JP7530082B2 - Continuously stirred tank reactor - Google Patents

Description

Application of Article 30, paragraph 2 of the Patent Act A continuous stirred tank reactor was exhibited at "JASIS 2019" held from September 4 to 6, 2019. A continuous stirred tank reactor was exhibited at the "12th FlowST Workshop and 1st FlowST Exhibition" held on September 6, 2019. A continuous stirred tank reactor was exhibited at "Microprocessing Frontline" held on December 2, 2019, and a flyer introducing the continuous stirred tank reactor was placed. A continuous stirred tank reactor was exhibited at "Okayama Microreactor Net" held on December 6, 2019, and a flyer introducing the continuous stirred tank reactor was placed.

The present invention relates to a continuous stirred tank reactor.

As shown in Patent Document 1, a continuous stirred tank reactor (hereinafter simply referred to as a tank reactor) having multiple reaction tanks is known. The tank reactor of Patent Document 1 can be used on a tabletop, and a magnetic stirrer can be used to drive a stirrer placed in the reaction tank.

JP 2018-192384 A

In the tank-type reactor of Patent Document 1, a disk-shaped elastic material or the like is sandwiched between the main body and the fixed part, and the main body and the fixed part are fixed with screws. A through hole is provided in the center of the disk-shaped elastic member. For this reason, in the tank-type reactor of Patent Document 1, gas and liquid leak from the through hole, making it impossible to carry out a reaction under pressurized conditions.

The objective of the present invention is to provide a tank-type reactor that is capable of carrying out a desired reaction under pressurized conditions and that can increase pressure resistance by strongly pressurizing the pressure-resistant member and the packing.

The above-mentioned problem is solved by a continuous stirred tank reactor having a lower member having a plurality of reaction tanks each composed of a bottomed hole, a pressure-resistant member for sealing the plurality of reaction tanks, a packing disposed between the pressure-resistant member and the lower member, and an upper member fixed by a screw so as to sandwich the packing and the pressure-resistant member between the lower member and the upper member. The packing and the pressure-resistant member are sandwiched between the upper member and the lower member and fixed by the screw, and a gap is formed between the upper member and the lower member when the upper end of the packing contacts the bottom surface of the pressure-resistant member and the lower end of the packing contacts the upper surface of the lower member, and the screw can be further tightened from this state. In the above tank-type reactor, a gap is formed between the upper member and the lower member when the pressure-resistant member and the packing are sandwiched between the upper member and the lower member and the screw is tightened. Due to the presence of this gap, the upper member can be displaced in a direction approaching the lower member without being hindered by the lower member, and the pressure-resistant member can be strongly pressed against the lower member when screwed together. It is preferable to place the packing in a recess provided in the lower member, as this makes it easier to determine the position of the packing and also makes it less likely to shift out of position.

In the above tank-type reactor, the pressure-resistant member is preferably made of a see-through material, and the upper member is provided with a sight glass, so that the state inside the reaction tank can be observed through the sight glass and the pressure-resistant member. This makes it possible to visually observe the state inside the reaction tank, and to irradiate light into the reaction tank, for example, to cause a photochemical reaction.

In the above tank-type reactor, it is preferable that the upper member is provided with a protective member made of a see-through material. By providing a protective member made of a see-through material, it is possible to prevent the contents in the reaction tank from leaking forcefully outside the device in the unlikely event that the pressure-resistant member is damaged. In addition, by making the protective member see-through, it is possible to visually inspect the inside of the reaction tank and irradiate it with light through the observation window and the pressure-resistant member.

In the above tank-type reactor, the lower member has a first step and a second step, the second step is located lower than the first step, and a receiving surface of the pressure-resistant member is disposed between the first step and the second step. When the upper member and the lower member are not fastened, the packing is disposed on the edge surface of the reaction tank at the same position as the lower end of the second step, and it is preferable that the upper end of the packing is located higher than the receiving surface of the pressure-resistant member. The receiving surface prevents the screws from being over-tightened, and the packing can be prevented from being over-compressed and damaged. In addition, since the upper end of the packing is located above the receiving surface of the pressure-resistant member, the screws can be further tightened from the state in which the pressure-resistant member is in contact with the upper end of the packing to compress the packing and increase the pressure resistance.

The present invention provides a tank-type reactor that can carry out a desired reaction under pressurized conditions and can increase pressure resistance by strongly pressing the pressure-resistant member against the packing.

FIG. 1 is an exploded perspective view showing one embodiment of a continuous stirred tank reactor. FIG. 2 is a plan view of the tank reactor of FIG. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2 . FIG. 4 is an enlarged view of part B in FIG. 3 . 5 is a cross-sectional view showing a state in which the screws are further tightened from the state shown in FIG. 4 . FIG. FIG. 7 is a cross-sectional view taken along line CC in FIG. 6 . FIG. 7 is a cross-sectional view taken along line DD in FIG. 6 . FIG. 2 is a cross-sectional view showing another embodiment of the tank reactor. FIG. 2 is a front view of the tank-type reactor of FIG. 1 in an assembled state. FIG. 11 is a rear view of the tank reactor of FIG. FIG. 11 is a left side view of the tank reactor of FIG. FIG. 11 is a right side view of the tank reactor of FIG. FIG. 11 is a plan view of the tank reactor of FIG. FIG. 11 is a bottom view of the tank reactor of FIG. FIG. 11 is a cross-sectional view taken along the line EE of FIG. FIG. 11 is a perspective view of the tank reactor of FIG. FIG. 2 is an enlarged cross-sectional view of a tank-type reactor according to a comparative example. FIG. 2 is a front view of a tank-type reactor according to a reference example. FIG. 20 is a rear view of the tank reactor of FIG. 19. FIG. 20 is a left side view of the tank reactor of FIG. 19 . FIG. 20 is a right side view of the tank reactor of FIG. 19. FIG. 20 is a plan view of the tank reactor of FIG. 19. FIG. 20 is a bottom view of the tank reactor of FIG. 19. FIG. 20 is a perspective view of the tank reactor of FIG. 19.

Below, an embodiment of the continuous tank reactor (hereinafter referred to as a tank reactor) of the present invention and its modified examples will be described with reference to the drawings. The tank reactor described below is merely one embodiment of the present invention, and the technical scope is not limited thereto. Figures 1 to 8 show one embodiment of the tank reactor, and Figure 9 shows a modified example. Figures 10 to 17 show the appearance of a tank reactor in which the upper and lower members are fastened together. Figure 18 shows a cross-sectional view of a tank reactor for comparison. Figures 19 to 25 show the appearance of a tank reactor according to a reference example.

As shown in FIG. 1, the tank reactor 11 of this embodiment has a lower member 111, a pressure-resistant member 113, a gasket 114, an upper member 112, a number of screws 115, and a protective member 116. Note that FIG. 1 shows only one of the multiple gaskets arranged in each reaction tank, and the rest are not shown.

As shown in Figures 1 and 3, the lower member 111 has multiple reaction tanks 21 each composed of multiple bottomed holes. In the tank-type reactor 11 of this embodiment, the lower member 111 is composed of stainless steel. In this specification, a bottomed hole means a hole with a bottom. In the example of Figure 3, the reaction tank 21 is a hole having a shape in which a conical portion and a cylindrical portion are connected to each other, the conical portion is located at the bottom, and the cylindrical portion is located at the top of the lower member 111. The upper end of the cylindrical portion of the reaction tank 21 reaches the upper surface of the lower member and is an opening. Since the bottom of the reaction tank 21 is a conical portion, the liquid level in the reaction tank is high even with a small amount of liquid.

In the tank-type reactor 11 of this embodiment, the lower member 111 has a first portion 22 in which a plurality of reaction tanks 21 are provided, and a second portion 23 arranged adjacent to the outer periphery of the first portion 22, as shown in FIG. 1. The first portion 22 is cylindrical, and the second portion 23 has a shape that includes the first portion 22 and is arranged adjacent to the first portion. In the tank-type reactor 11, the first portion 22 and the second portion 23 are configured as an integral cylindrical member. Specifically, the first portion 22 and the second portion 23 are configured as an integral continuous stainless steel, and the reaction tank 21 is formed by cutting the first portion 22. Therefore, the number of parts that constitute the lower member 111 is small, and the tank-type reactor 11 is easy to assemble.

In the tank-type reactor 11 of this embodiment, a total of four reaction tanks 21 are provided in the first portion of the lower member 111. As shown in FIG. 6, the reaction tanks are arranged from upstream to downstream in the order of the first reaction tank 1, the second reaction tank 2, the third reaction tank 3, and the fourth reaction tank 4. The most upstream reaction tank 1 is provided with two injection holes 221 that communicate with the inside of the reaction tanks from the side of the lower member 111. The multiple injection holes 221 are connected to a supply unit for pre-reaction materials such as substrates, such as a syringe pump. The supply unit for pre-reaction materials is liquid-tightly and airtightly connected to the injection holes using a packing or the like.

The most downstream reaction tank 4 is provided with a discharge hole 222 that connects from the side of the lower member 111 to the inside of the reaction tank. A suction part for sucking up the reaction product using a syringe pump or the like is connected to the discharge hole 222. The suction part is connected to the discharge hole in a liquid-tight and airtight manner using a packing or the like.

In the tank-type reactor 11 of this embodiment, an injection hole 221 or a discharge hole 222 is provided on the side of the lower member 111. Therefore, the injection hole, discharge hole, and syringe pump connected thereto are not visible on the top surface of the tank-type reactor 11. Since the top surface of the tank-type reactor 11 is open, there is nothing to observe the state inside the reaction tank through the observation window 117 described below, or to block light irradiation.

In the tank reactor 11 of this embodiment, a communication hole 223 is provided between the first reaction tank 1 and the second reaction tank 2, between the second reaction tank 2 and the third reaction tank 3, and between the third reaction tank 3 and the fourth reaction tank 4. When using the tank reactor 11, a stirrer, a solvent, a catalyst, an enzyme, or the like is put into any reaction tank. Any substrate, catalyst, enzyme, or the like is supplied from the supply section, and the substrate and catalyst are mixed by rotating the stirrer to perform a desired chemical reaction. The substrate, catalyst, etc. supplied to the tank reactor 11 move through the respective communication holes 223 while being stirred in the order of the first reaction tank 1, the second reaction tank 2, the third reaction tank 3, and the fourth reaction tank 4, and the desired chemical reaction proceeds in the process. The reactants that reach the fourth reaction tank 4 are taken out of the tank reactor 11 by sucking the reaction products from the discharge hole 222 with the above-mentioned suction section. The stirrer may be driven by a driving source such as a motor, or a commercially available magnetic stirrer may be placed under the lower member and the stirrer may be rotated by the magnetic force of the magnetic stirrer.

In the tank-type reactor 11 of this embodiment, there is no communication hole between the first reaction tank 1 and the fourth reaction tank 4, and a groove 225 is provided to thermally separate the first reaction tank 1 and the fourth reaction tank 4. The groove may be any groove that can thermally separate one reaction tank from the other reaction tank. In the tank-type reactor of this embodiment, the groove 225 is composed of a slit-shaped groove that does not penetrate the bottom of the lower member 111.

In the tank reactor 11 of this embodiment, as shown in FIG. 4, a first step 231 is provided between the first part 22 and the second part 23, into which the pressure-resistant member 113 can be fitted. A receiving surface 232 is provided at the lower end of the first step 231. Due to the first step 231, the receiving surface 232 of the pressure-resistant member 113 is lower than the upper surface of the second part 23. The receiving surface 232 is at the same height as the lower end of the first step 231 and is a surface that extends along the extension direction of the pressure-resistant member 113. Since the first step 231 corresponds to the outer shape of the pressure-resistant member 113, when the pressure-resistant member 113 is placed over the lower member 111, the position of the pressure-resistant member 113 is easily fitted into a previously designed position. In the tank reactor 11 of this embodiment, the shape of the first step 231 is circular when viewed from above. The shape of the pressure-resistant member 113 is also circular when viewed from above.

In the tank-type reactor 11 of this embodiment, a second step 234 is provided on the edge of the reaction tank 21 provided on the lower member 111. The second step 234 makes the edge surface 235 of the reaction tank lower than the second step 234 or the receiving surface 232 of the pressure-resistant member 113. Since the second step 234 corresponds to the outer shape of the packing 114, when placing the packing 114 on the edge of the reaction tank 21, it is easy to place the packing 114 in a pre-designed position, and the position of the packing 114 is less likely to shift when the upper member and the lower member are fastened. In the tank-type reactor 11 of this embodiment, the shape of the second step 234 is circular when viewed from above. The shape of the packing 114 is also annular.

As shown in FIG. 1, the upper surface of the second portion 23 of the lower member 111 is provided with a number of screw holes 236, which are configured to receive screws inserted into the upper member 112 as described below.

The pressure-resistant member 113 is fixed between the lower member 111 and the upper member 112 so as to be sandwiched between them. In the tank-type reactor 11 of this embodiment, the pressure-resistant member 113 is a circular plate-like member when viewed from above. The size of the pressure-resistant member 113 when viewed from above is configured to be smaller than the sizes of the lower member 111 and the upper member 112 when viewed from above. As a result, a gap 31 is formed between the upper member 112 and the lower member 111, as shown in FIG. 4. The gap 31 is formed in the outer periphery of the pressure-resistant member 113.

The pressure-resistant member may be any member that has the pressure resistance to withstand the pressure inside the reaction tank. In the tank-type reactor 11 of this embodiment, the pressure-resistant member is made of transparent sapphire glass, which is a type of ceramic glass. Therefore, the pressure-resistant member not only withstands the pressure inside the reaction tank, but also allows the state inside the reaction tank to be visually confirmed and light to be irradiated into the reaction tank through the observation window 117 provided in the upper member 112 and the pressure-resistant member 113, as described below.

A gasket 114 is placed between the pressure-resistant member 113 and the lower member 111. The gasket 114 may be any gasket that can withstand the pressure inside the reaction tank. In the tank-type reactor 11 of this embodiment, multiple gaskets 114 made of synthetic rubber are placed so as to fit into the second step 234 on the edge of each reaction tank 21. The gaskets 114 are circular when viewed from above, and four are used as shown in FIG. 1. Note that FIG. 1 shows only one gasket, and the remaining three are omitted. In the tank-type reactor 11 of this embodiment, the gasket 114 is placed in a recess provided in the lower member 111. In the example of FIG. 4, the recess is composed of a step 234 and an edge surface 235, which will be described later.

The upper member 112 is fixed to the lower member 111 by inserting multiple screws 115 and screwing the multiple screws 115 into the screw holes of the lower member 111. In the tank-type reactor 11 of this embodiment, the upper member 112 is a plate-like member that is circular when viewed from above, and is made of stainless steel. The diameter of the circle of the upper member when viewed from above and the diameter of the circle of the lower member when viewed from above are approximately the same. This allows the upper member 112 and the lower member 111 to have a smoothly continuous outer shape when fastened together.

As shown in FIG. 1, the upper member 112 has a plurality of screw holes 236 for inserting the screws 115 and a plurality of sight windows 117 provided at positions corresponding to the plurality of reaction tanks 21 provided in the lower member 111. The screw holes 236 penetrate the upper member 112 in the vertical direction. In the tank-type reactor 11 of this embodiment, the sight window 117 is composed of a hole penetrating the upper member 112 in the upper direction. As described above, the sight window 117 is provided at a position corresponding to the plurality of reaction tanks 21 provided in the lower member 111. The pressure-resistant member 113 is made of a transparent material. In addition, as described later, a protective member made of a see-through material is fixed to the upper member 112. Therefore, in the tank-type reactor 11 of this embodiment, the state inside the reaction tank can be observed through the sight window 117 and the pressure-resistant member 113.

In the tank-type reactor 11 of this embodiment, as shown in FIG. 4, a step 237 is provided on the bottom surface of the upper member 112. The shape of the recess surrounded by the step 237 corresponds to the shape of the pressure-resistant member 113. When the pressure-resistant member 113 is arranged so as to be sandwiched between the upper member 112 and the lower member 111, the pressure-resistant member 113 fits inside the step 237. This makes it possible to arrange the pressure-resistant member 113 in a pre-designed position and fix the upper member 112 and the lower member 111.

A protective member 116 made of a material that allows the inside of the reaction tank to be viewed is attached to the upper surface of the upper member 112. In the tank-type reactor 11 of this embodiment, the protective member is a plate-shaped member made of transparent acrylic resin. The protective member 116 has a shape in which the circumference is cut out in an arc shape at multiple points. The cutouts of the protective member 116 accommodate the heads of multiple screws 115 that fix the upper member 112 and the lower member 111 when the protective member 116 is fixed to the upper member 112. The protective member 116 has screw holes for inserting multiple screws. Screws 118 for fixing the protective member 116 to the upper member 112 are inserted into the screw holes. The protective member 116 is fixed to the upper member 112 by screwing the multiple screws 118 into the screw holes provided in the upper member 112.

As shown in FIG. 4, the tank-type reactor 11 of this embodiment is configured such that when the upper member 112 and the lower member 111 are not fastened and each packing 114 is placed on the edge surface 235 of each reaction tank 21, the upper end of the packing 114 is located higher than the receiving surface 232 of the pressure-resistant member 113. The edge surface 235 is located at the same position as the lower end of the second step 234. With this configuration, the pressure-resistant member 113 comes into contact with the upper end of the packing 114 before it comes into contact with the receiving surface 232 of the lower member 111. As a result, the pressure-resistant member 113 is pressed against the packing, resulting in high airtightness or liquid-tightness.

In the tank-type reactor 11 of this embodiment, when the upper member 112 and the lower member 111 are fixed with the screw 115 with the gasket 114 and the pressure-resistant member 113 sandwiched therebetween, a gap 31 is formed between the upper member 112 and the lower member 111. As shown in Figures 4 and 5, by tightening the screw 115, the upper member 112 and the lower member 111 are displaced in a direction approaching each other, and the upper end of the gasket 114 contacts the bottom surface of the pressure-resistant member 113, and the lower end of the gasket 114 contacts the upper surface of the lower member 111. As shown in Figure 4, immediately after the upper end of the gasket 114 contacts the bottom surface of the pressure-resistant member 113, the size of the gap formed between the bottom surface of the upper member 112 and the upper surface of the lower member 111 is L1, and the thickness of the gasket 114 at this time is P1. When the screw 115 is further tightened from the gap L1 state, the bottom surface of the pressure-resistant member 113 comes into contact with the receiving surface 232 of the lower member 111, and the tightening of the screw 115 is complete. As shown in FIG. 5, the above gap at this time is L2, and the thickness of the packing 114 at this time is P2.

In the tank reactor 11 of this embodiment, when the bottom surface of the pressure-resistant member 113 contacts the upper end of the packing 114 and the upper surface of the lower member contacts the lower end of the packing 114, a gap L1 is formed between the bottom surface of the upper member 112 and the upper surface of the lower member 111. Therefore, by tightening the screw 115 until the gap L1 becomes L2, the packing can be compressed from a thickness of P1 to a thickness of P2. At this time, P1>P2. Thus, in the tank reactor 11 of this embodiment, when the bottom surface of the pressure-resistant member 113 contacts the upper end of the packing 114 and the upper surface of the lower member contacts the lower end of the packing 114, the bottom surface of the upper member 112 and the upper surface of the lower member 111 are not in contact with each other and a gap is provided, so that the packing 114 can be further compressed by tightening the screw, thereby increasing the pressure resistance. L1 is not particularly limited, but can be, for example, 1 to 10 mm. L2 is not particularly limited, but can be, for example, 5 mm or less. However, L2 is greater than 0 mm. This is to reduce the loss of screw fastening force caused by the upper and lower members coming into contact with each other, and to concentrate the screw fastening force on the packing.

Figure 18 is a cross-sectional view of the tank reactor 11 according to the comparative example, which corresponds to Figure 4. In the tank reactor 11c according to the comparative example, when the bottom surface of the pressure-resistant member 113 contacts the upper end of the packing 114 and the upper surface of the lower member 111c contacts the lower end of the packing 114, the bottom surface of the upper member 112c and the upper surface of the lower member 111c are in close contact. In the tank reactor of the comparative example, the screw 115 cannot be further tightened from the state in which the bottom surface of the pressure-resistant member 113 contacts the upper end of the packing 114 and the upper surface of the lower member contacts the lower end of the packing 114. Therefore, the packing 114 cannot be further compressed from the state in which the bottom surface of the pressure-resistant member 113 contacts the upper end of the packing 114 and the upper surface of the lower member contacts the lower end of the packing 114. In the comparative example, the tank-type reactor 11c cannot increase pressure resistance by further tightening the screws to further compress the gasket 114.

As shown in Figures 19 to 25, a configuration is also possible in which a gasket having the same diameter as the upper and lower members when viewed from above and a pressure-resistant member are sandwiched between the upper and lower members. However, although a tank-type reactor with this configuration can withstand pressures up to about 1.5 MPa, its pressure resistance is inferior to that of the tank-type reactor 11 of this embodiment. The tank-type reactor of this embodiment can withstand pressures up to about 20 MPa. In the tank-type reactors of Figures 19 to 25, two polytetrafluoroethylene sheets are used as the gaskets, and through holes are drilled in the areas corresponding to the six-hole reaction tank and the screw holes.

In the tank-type reactor 11 of this embodiment, when the bottom surface of the pressure-resistant member 113 comes into contact with the receiving surface 232, the upper member 112 cannot approach the lower member 111 even if the screw is tightened, and the user is made aware that the tightening operation is complete. By providing the first step 231 and the receiving surface 232, it is possible to prevent the packing 114 or the pressure-resistant member 113 from being over-compressed and damaged by over-tightening the screw. The packing 114 is placed on the edge surface 235 of the packing, which is located lower than the receiving surface 232. Therefore, the bottom surface of the pressure-resistant member 113, which is stopped by the receiving surface 232, compresses it to a degree that does not cause damage, thereby providing high pressure resistance.

In the tank-type reactor 11 of this embodiment, a see-through pressure-resistant member 113 is provided, making it possible to observe the state inside the reaction tank and to supply light to the reaction tank. The screws are configured to contact the upper member 112, rather than being pressed against the see-through pressure-resistant member 113. With this configuration, the screws are not pressed against the see-through pressure-resistant member, so it is possible to prevent the pressure-resistant member from being damaged by the screws.

In the tank-type reactor 11 of this embodiment, the upper member 112 and the pressure-resistant member are configured as separate members. The upper member and the pressure-resistant member may be configured as an integrated member as shown in FIG. 9. In the tank-type reactor 11b of FIG. 9, the upper member 112b and the pressure-resistant member 1123 are formed of stainless steel. Since the upper member 112b and the pressure-resistant member 1123 are configured as an integrated single member, the operation of assembling the tank-type reactor 11b is easy. In FIG. 9, the same reference numerals as in FIG. 1 and the like are used for the same components as the above-mentioned tank-type reactor.

In the tank-type reactor 11 of this embodiment, a chemical reaction progresses as the reaction substrates pass through and are stirred through the multiple reaction tanks 21 and the communication holes 223. The communication holes 223 and reaction tanks are less likely to become clogged with solid matter compared to methods in which chemical reactions are caused by minute flow paths called microreactors. For this reason, the tank-type reactor 11 of this embodiment can be suitably used for chemical reactions that are carried out under pressure and involve the precipitation of solid matter, or chemical reactions that add solid matter such as solid catalysts.

In the above tank-type reactor 11, the number of reaction tanks is four. The number of reaction tanks is not limited to this and can be increased or decreased as appropriate. The shape of the reaction tank is also not limited to the above example and may be any shape that has a bottom.

The shape of the lower member may be any shape that can form a reaction vessel. The first and second parts of the lower member may be made of separate materials. For example, the first part may be made of Hastelloy and the second part may be made of stainless steel.

The protective member may be omitted. The protective member may be made of a transparent material such as tempered glass, glass, acrylic resin, or ceramic glass, or may be made of a translucent material that has been given a matte finish.

The shape of the pressure-resistant member is not limited to a circle or a plate, and may be, for example, a block shape. The pressure-resistant member may be made of tempered glass. The pressure-resistant member may be made of a translucent material, such as matte tempered glass.

The shape and number of packings are not limited, and a single packing may be used to make all reaction vessels airtight and liquidtight.
stomach.

The number of sight windows may be one. A cover made of a material that allows the inside of the reaction vessel to be seen through the through hole may be attached to the sight window.

The shape of the lower or upper member is not limited to a cylindrical shape and may be other shapes. There are also no particular limitations on the material that constitutes the lower or upper member.

11 Continuous stirred tank type reactor 21 Reaction tank 111 Lower member 112 Upper member 113 Pressure-resistant member 114 Gasket 115 Screw 117 Viewport 116 Protective member 11b Continuous stirred tank type reactor

Claims (5)

A continuous stirred tank reactor comprising: a lower member having a plurality of reaction vessels each having a bottomed hole; a pressure-resistant member for sealing the plurality of reaction vessels; a packing disposed between the pressure-resistant member and the lower member; and an upper member fixed by screws so as to sandwich the packing and the pressure-resistant member between the lower member and the upper member,
The packing and the pressure-resistant member are sandwiched between the upper and lower members and fixed with screws, and a gap is formed between the upper and lower members when the upper end of the packing is in contact with the bottom surface of the pressure-resistant member and the lower end of the packing is in contact with the upper surface of the lower member, and the screws can be further tightened from this state ,
the lower member has a first step and a second step, the second step being located lower than the first step;
a receiving surface of the pressure-resistant member is disposed between the first step and the second step;
When the upper member and the lower member are not fastened to each other, the packing is disposed on the edge surface of the reaction vessel at the same position as the lower end of the second step, and the upper end of the packing is located higher than the receiving surface of the pressure-resistant member ;
The pressure-resistant member is lowered by tightening a screw, and a packing is compressed at the bottom surface of the pressure-resistant member , thereby bringing the bottom surface of the pressure-resistant member into contact with the receiving surface, thereby restricting the descent of the pressure-resistant member. 2. The continuous stirred tank reactor according to claim 1, wherein the packing is disposed in a recess provided in the lower member. The pressure-resistant member is made of a transparent material, and a viewing window is provided in the upper member.
3. The continuous stirred tank reactor according to claim 1 or 2, which is configured so that the condition inside the reaction tank can be observed through the observation hole and the pressure-resistant member. 4. The continuous stirred tank reactor according to claim 1, wherein the upper member is provided with a protective member made of a see-through material. 5. The continuous agitation vessel according to claim 1, wherein the upper member and the pressure-resistant member are an integral member. Type reactor.

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