JPH0620521B2 - Continuous processing equipment for highly viscous substances - Google Patents

Description

The present invention relates to a reaction for removing volatile substances such as alcohol and water during the progress of condensation or polymerization, particularly in the case of producing a high-molecular polymer, particularly high polymerization. The present invention relates to a continuous treatment device for high-viscosity substances relating to the production of fine products.

[Conventional technology]

Generally, in a process involving evaporation such as removal of a tracking substance which is a viscous substance during the reaction, an operation under reduced pressure is performed.
The efficiency of evaporation rises in proportion to the degree of pressure reduction, but when the atmospheric pressure is sharply lowered, part of the volatile substances removed by evaporation are discharged out of the system. Moreover, the physical properties of the viscous substance change due to the acceleration of evaporation, and the liquid viscosity rapidly increases.

Conventionally, for example, in the polyester polymerization reaction, there is no particular problem when producing fiber grade polyester. Because the degree of polymerization of fiber grade polyester is relatively low at 0.6-0.65, and the viscosity of the polymerized viscous substance at this time is about 3000 poise, existing reactors (for example, the contents described in Japanese Patent Publication No. 50-21514) are sufficient. This is because it can be processed.

However, when polyester of high polymerization degree grade (for example, tire cord grade, bottle grade) is produced, the degree of polymerization of polyester is as high as 0.8 or more and the viscosity is as high as 10,000 poise or more, so the treatment process becomes complicated. Was there.

For example, as shown in FIG. 5, the degree of polymerization of fiber grade, 0.
Up to about 6 to 0.65, the existing horizontal biaxial reaction device 12 is used for treatment, and then the CHIP conversion device 13 cools, cuts and dehydrates the polymer to make it into a CHIP state. Was getting

In addition, as shown in FIG. 6, a viscous substance in the form of parc is provided by providing a high-viscosity reaction device 16 (for example, the contents described in JP-A-62-112624) in a subsequent step of the existing horizontal biaxial reaction device 12. There is also a method of processing as it is.

[Problems to be Solved by the Invention]

The above-mentioned conventional technology does not consider continuous treatment of high-viscosity substances, and if a high degree of polymerization is to be produced, the treatment process will be complicated, resulting in an increase in equipment cost and an increase in operation and maintenance points. There were problems such as complication of work and increase of equipment installation space.

It is an object of the present invention to provide a continuous treatment device for highly viscous substances that eliminates the above drawbacks.

[Means for Solving the Problems]

The above-mentioned object is to provide a partition plate inside the conventional horizontal reactor and to have a two-chamber structure capable of processing by making the operating pressure different for each chamber, and there is no dead space in the front chamber and the stirring effect,
A stirring blade with a large volatile evaporation effect is provided, and in the rear chamber, a stirring blade having a structure that prevents co-rotation of high-viscosity substances and adhesion to the blade and shaft is provided, and the final polymerization reaction is performed in the front chamber. This is achieved by allowing a high degree of polymerization reaction in the rear chamber.

[Action]

The reactor is divided into two chambers by a partition plate, and since each chamber has an evaporative gas exhaust nozzle, it is possible to perform treatment with different operating pressures for each chamber.

The front chamber is provided with an agitating blade having an annular support plate and a scraping plate at its tip, which allows the final polymerization reaction (degree of polymerization = about 0.65, liquid viscosity of about 3000 poise) to be carried out. .

In the rear chamber, another agitating blade constituted by a rod-shaped rectangular frame is provided, whereby a high degree of polymerization reaction (degree of polymerization = 0.8 or more, liquid viscosity 20,000 poise or more) can be performed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 4 shows a method for producing a heavy product using the reaction apparatus 17 of the present invention. As shown in the drawing, the high degree of polymerization product is treated only inside the reaction apparatus 17.

Details of the reactor 17 are shown in FIGS. 1 to 3, and will be described below with reference to this figure. Inside the main body 1 of the reactor which is installed substantially horizontally (here, the main body of the container may have a structure in which a jacket is provided on the outer periphery thereof to enable the main body to be heated), the main body 1 is provided in parallel with each other. The rotary shafts 2a, 2b and the notches as the flow paths of the liquid to be treated, and the rotary shafts 2a, 2
A partition plate 7 having a notch for installing b is provided so as to partition the inside of the reaction device into two chambers. In the front chamber, an agitating blade 5 composed of an annular support plate 3 fixed to the rotary shafts 2a and 2b at right angles to the shaft and a scraping plate 4 fixed at the tip at a right angle to each other is opposed to each other. A plurality of them are attached with a phase angle of 90 degrees.

In the rear chamber, other stirring blades 14 having a structure in which rotating shafts 2a and 2b are connected with rectangular frames 6a and 6b formed in the direction perpendicular to the shafts without interposing the shafts are arranged at an angle of 45 degrees. Multiple objects are attached with a phase angle.

In addition, the rotating shafts 2a and 2b are supported so that the tips of the stirring blades 5 and the rod-shaped rectangular frame 6a pass near the rotating shafts 2a and 2b (rotation centers). Further, the container body 1 is provided with a high-viscosity liquid inlet nozzle 10, an outlet nozzle 11, exhaust nozzles 9a and 9b, and shaft sealing devices 8a and 8b for rotating shafts.

High viscosity liquid (liquid viscosity 30
(About 0 poise) is agitated by the agitating blades 5 and the surface is updated by the rotation of the rotary shafts 2a and 2b which rotate in the opposite directions from the inner side to the outer side of the container body 1 in the front chamber as shown by an arrow (Fig. 2). While receiving the action, the volatile components are evaporated to accelerate the reaction, and the viscosity gradually increases and the viscosity is sent to the rear chamber side.

In the case of performing a process that normally involves an evaporation operation, the high-viscosity liquid is not filled in the container and the upper part of the container is a gas phase part. The gas phase in the container is completely partitioned by the partition plate 7, and the dripping surface of the high-viscosity liquid in the front chamber is controlled so as to come to the upper part of the notch for installing the rotating shafts 2a and 2b. The container body 1 is completely partitioned into two chambers, and the operating pressure in each chamber can be adjusted independently. The structure, position, and size of the partition plate 7 are not particularly limited.

Usually, the operating pressure in the antechamber is about 1 to 2 Torr and is lower than that in the antechamber.

The high-viscosity liquid (liquid viscosity of about 3000 poise) supplied to the rear chamber side is subjected to a surface renewal action by the stirring blades composed of rod-shaped rectangular frames 6a and 6b which perform the same rotary motion as the stirring blades 5 in the front chamber. While evaporating the volatile components, the reaction is promoted, the viscosity gradually increases, and the liquid is discharged from the liquid outlet nozzle 11. Further, the volatile components evaporated in each chamber are exhausted by the exhaust nozzle 9a,
It is discharged by 9b.

Needless to say, the stirring performance of the stirring blades installed in the front chamber and the rear chamber has already been confirmed to be functionally sufficient.

〔The invention's effect〕

According to the present invention, a polymer can be highly polymerized in a viscous liquid state in a single reactor, so that the treatment process can be simplified, resulting in reduction of equipment cost, operation and maintenance. There are effects such as reduction, simplification of work, and reduction of equipment installation space.

[Brief description of drawings]

1 is a plan sectional view of a reactor according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is III of FIG.
-III sectional view, FIG. 4 is a schematic view showing a process for producing a high degree of polymerization polymer when the reactor according to the present invention is used, FIG.
FIG. 6 and FIG. 6 are schematic views showing a conventional high-polymerization degree polymer production process. 1 ... Container body, 2a, 2b ... Rotating shaft, 5 ... Front chamber stirring blade, 6a, 6b ... Rod-shaped rectangular frame, 7 ... Partition plate, 12 ...
… Horizontal biaxial reactor, 13 …… CHIP device, 14 …… Rear chamber stirring blade, 15 …… Solid-state polymerization device, 16 …… High viscosity reactor, 17 …… Reactor according to the present invention

Claims (2)

[Claims] 1. A horizontal container is provided with two rotary shafts arranged at both ends in a longitudinal direction in a cylindrical container, and a partition plate is provided inside the cylindrical container so as to divide the cylindrical container in the longitudinal direction. In the front chamber formed by the partition plate, a plurality of stirring blades made of an annular support plate are installed using the two rotating shafts, and the installed rotating shafts of the rotating blades of one rotating shaft are opposed to each other. The tip is formed so that it passes near the rotation center of the stirring blade of the other rotating shaft, and another stirring blade with a plurality of rod-shaped rectangular frames connected to the rear chamber side is connected to the rotating shaft and the end of the front chamber. Installed between the rotating shafts of the other, and held so that the tip end of the rod-shaped rectangular frame of the other one stirring blade corresponding to each other passes in close proximity to the rotation center of the other stirring blade of the other A continuous treatment device for high-viscosity substances. 2. A plurality of stirring blades each comprising a supporting plate, another stirring blade having a rod-shaped rectangular frame connected thereto, and a stirring blade and another stirring blade which are adjacent to each other, respectively. A continuous processing device for highly viscous substances, characterized in that they are connected to each other with a phase angle of 90 degrees.