JP4840995B2 - Dilutions of water-in-oil dispersions, methods for their preparation and methods for their use - Google Patents

Description

The present invention is a dilute solution in which a means for mixing a water-in-oil dispersion and water is connected in the middle of a pipe to continuously dissolve the water-in-oil dispersion, and the water-in-oil dispersion is immiscible with water. Dilution liquid of water-in-oil dispersion characterized by being excellent in dissolution containing organic liquid, water phase containing water-soluble polymer, acid and cationic oil-soluble polymer as essential, and preparation method thereof And its usage.

Water-in-oil dispersions containing water-soluble polymers in the aqueous phase are easier to measure, dissolve and automate than powdered or highly viscous liquids. In particular, water-in-oil emulsions are excellent in handleability and are widely used as flocculating agents and thickeners. Usually, the water-soluble polymer is dissolved in a batch system by installing a dilution tank equipped with a stirrer. However, for water-in-oil emulsions, a method of continuous dissolution in the line has been proposed to reduce the equipment scale and installation area. However, in Patent Document 1, the emulsion polymer flocculant to be used is generally commercially available, and the dissolution rate is slow. Even though it seems to be completely dissolved during line dissolution, there are actually many undissolved parts. On the other hand, there is a problem that requires a large amount of chemical addition. Patent Document 2 relates to the composition of a water-soluble polymer, which is effective when the amount of ionic monomer units is large, but when the amount of ionic monomer units is small, a sufficient dissolution rate cannot be obtained. There were problems such as generation of foreign matters during mold dispersion polymerization.
JP 7-328319 A JP 2004-202400 A

The object of the present invention is to use water-in-oil dispersions excellent in dissolution, particularly water-in-oil emulsions, so that troubles such as undissolved particles remain in piping parts when lines are dissolved, and water-soluble high The aim is to develop a dissolution method that allows efficient line dissolution without limiting the molecular composition. Here, when it is described as a water-in-oil dispersion, it refers to a dispersion having a water phase particle size of 0.5 to 500 μm, and when it is described as a water-in-oil emulsion, the water phase particle size is 0.1 to 500 μm. Refers to a 5 μm dispersion. Both are collectively referred to as a water-in-oil dispersion hereinafter.

As a result of intensive studies to achieve the above object, the present inventors have reached the following invention. That is, the invention of claim 1 is a dilution liquid in which a means for mixing a water-in-oil dispersion and water is connected in the middle of a pipe to continuously dissolve the water-in-oil dispersion, and the water-in-oil dispersion Is a water-immiscible organic liquid, an aqueous phase containing a water-soluble polymer, an acid, and a cationic oil-soluble polymer having a structural unit represented by the following general formulas (1) and (2) as an essential component. It is a dilution liquid of the water-in-oil dispersion liquid characterized by being.
General formula (1)
Here, R1 is hydrogen or a methyl group, Q is a phenyl group, an aryl group having 7 to 18 carbon atoms, an alkyl group, COOR3 or CONHR4. Here, R3 and R4 are alkyl groups having 4 to 18 carbon atoms. R2 is hydrogen or an alkyl group having 1 to 3 carbon atoms.
General formula (2)
R5 is hydrogen or a methyl group, R6 and R7 are alkyl or alkoxyl groups having 1 to 3 carbon atoms, and R8 is hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group or a benzyl group, which may be the same or different. A represents an oxygen atom or NH, and B represents an alkylene group or alkoxylene group having 2 to 4 carbon atoms. X1 represents an anion.

The invention according to claim 2 is characterized in that the cationic oil-soluble polymer comprises an alkyl (meth) acrylate having 50 to 95 mol% of an alkyl group having 4 to 18 carbon atoms and a dialkylaminoalkyl (meth) acrylate of 5 to 50 mol%. The dilution liquid of the water-in-oil dispersion according to claim 1, which is a copolymer.

The invention according to claim 3 is characterized in that the acid is added to the water-in-oil monomer dispersion before polymerization or the water-in-oil polymer dispersion after polymerization with respect to the amino group in the molecule of the cationic oil-soluble polymer. The dilution liquid of the water-in-oil dispersion according to claim 1 or 2, wherein 30 mol% or more and 1000 mol% or less are added.

The invention according to claim 4 is the dilution liquid of the water-in-oil dispersion according to claim 1, wherein the mixing means is a line mixer.

The invention of claim 5 provides a water-in-oil dispersion in the case of preparing a dilution of a water-in-oil dispersion that is continuously dissolved by connecting means for mixing the water-in-oil dispersion and water in the middle of the pipe. Is a water-immiscible organic liquid, an aqueous phase containing a water-soluble polymer, an acid, and a cationic oil-soluble polymer having a structural unit represented by the following general formulas (1) and (2) as an essential component. It is a method for preparing a dilute solution of a water-in-oil type dispersion liquid.
General formula (1)
Here, R1 is hydrogen or a methyl group, Q is a phenyl group, an aryl group having 7 to 18 carbon atoms, an alkyl group, COOR3 or CONHR4. Here, R3 and R4 are alkyl groups having 4 to 18 carbon atoms. R2 is hydrogen or an alkyl group having 1 to 3 carbon atoms.
General formula (2)
R5 is hydrogen or a methyl group, R6 and R7 are alkyl or alkoxyl groups having 1 to 3 carbon atoms, and R8 is hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group or a benzyl group, which may be the same or different. A represents an oxygen atom or NH, and B represents an alkylene group or alkoxylene group having 2 to 4 carbon atoms. X1 represents an anion.

The invention according to claim 6 is characterized in that the cationic oil-soluble polymer comprises an alkyl (meth) acrylate having 50 to 95 mol% of an alkyl group having 4 to 18 carbon atoms and a dialkylaminoalkyl (meth) acrylate of 5 to 50 mol%. It is a copolymer, It is a method of preparing the dilution liquid of the water-in-oil dispersion liquid of Claim 5.

In the invention according to claim 7, the acid is added to the water-in-oil monomer dispersion before polymerization or the water-in-oil polymer dispersion after polymerization with respect to the amino group in the molecule of the cationic oil-soluble polymer. The method for preparing a diluted solution of a water-in-oil dispersion according to claim 5 or 6, wherein 30 mol% or more and 1000 mol% or less are added.

The invention according to claim 8 is the method for adjusting the diluted liquid of the water-in-oil dispersion according to claim 5, wherein the mixing means is a line mixer.

Invention of Claim 9 adds the dilution liquid of the water-in-oil dispersion liquid in any one of Claims 1-4 to organic sludge, and spin-dry | dehydrates with a dehydrator, It is characterized by the above-mentioned. It is the usage method of the liquid dilution.

The present invention provides a water-immiscible organic liquid excellent in solubility, an aqueous phase containing a water-soluble polymer, an acid, a specific cationic group and a hydrophobic group in order to realize a dissolution method capable of efficient line dissolution. A water-in-oil dispersion containing a cationic oil-soluble polymer having the following structural unit as an essential component is used. The cationic oil-soluble polymer is preferably a copolymer of an alkyl (meth) acrylate having a C 4-18 alkyl group and a dialkylaminoalkyl (meth) acrylate. Further, the acid is added in an amount of 30 mol% or more to the water-in-oil monomer dispersion before polymerization or the water-in-oil polymer dispersion after polymerization with respect to the amino group in the molecule of the cationic oil-soluble polymer. It is preferable.

First, the cationic oil-soluble polymer will be described. The cationic oil-soluble polymer of the present invention can be produced by copolymerization of a hydrophobic monomer and a monomer having a cationic group. The hydrophobic monomer is a monomer having an aromatic ring such as styrene or α-methylstyrene or an aromatic ring to which an alkyl group is added, an aromatic ring having 6 to 20 carbon atoms such as an α-olefin, or an aliphatic vinyl compound. Moreover, the alkyl (meth) acrylate which has a C4-C18 alkyl group can also be used. Specific examples of the alkyl (meth) acrylate include the following. That is, butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl acrylate, butyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, stearyl methacrylate, and the like. Of these hydrophobic monomers, alkyl (meth) acrylate is preferable, and 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, and lauryl acrylate are more preferable.

The monomer having a cationic group is dialkylaminoalkylacrylamide or dialkylaminoalkyl (meth) acrylate. Specific examples of the dialkylaminoalkylacrylamide include dimethylaminopropylacrylamide and diethylaminopropylacrylamide. Specific examples of the dialkylaminoalkyl (meth) acrylate include dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoethyl acrylate and the like.

Of these combinations of copolymerization of the hydrophobic monomer and the monomer having a cationic group, 2-ethylhexyl acrylate or lauryl acrylate and dimethylaminoethyl methacrylate are most preferable.

The molar ratio of the hydrophobic monomer in the cationic oil-soluble polymer is preferably 50 to 95 mol%, more preferably 50 to 80 mol%. On the other hand, the molar ratio of the monomer having a cationic group is preferably 5 to 50 mol%, more preferably 20 to 50 mol%.

The cationic oil-soluble polymer can be prepared by a conventional polymerization method after preparing the monomer mixture. Examples of the polymerization method include solution polymerization, bulk polymerization, and suspension polymerization. A preferred method is solution polymerization which is easy to handle and handle the polymerization. In the case of solution polymerization, the polymerization is performed at a monomer concentration of 20 to 80%, preferably 40 to 60%. In this case, the polymerization solvent is preferably a nonpolar organic solvent. That is, it is an aromatic or aliphatic hydrocarbon, and particularly preferred is paraffin or isoparaffin having a boiling point of 190 ° C. to 230 ° C. used as a dispersion medium in water-in-oil emulsion polymerization.

The method for using the cationic oil-soluble polymer of the present invention can be arbitrarily used. That is, after polymerizing the cationic oil-soluble polymer, an appropriate amount is added and dispersed in the water-in-oil emulsion, and then an amount of acid proportional to the amino group in the cationic oil-soluble polymer is added and stabilized. Alternatively, an acid in an amount proportional to the amino group in the cationic oil-soluble polymer may be added to the water-in-oil dispersion in advance, and the cationic oil-soluble polymer may be added after polymerization. Preferably, an acid is added in advance, and a cationic oil-soluble polymer is added after polymerization.

The acid added as described above is to neutralize and dissociate the amino group of the cationic oil-soluble polymer to enhance the dispersibility of the cationic oil-soluble polymer and improve the function as a dispersion stabilizer. Another object is to prevent deterioration of the water-soluble polymer by adjusting the water-in-oil dispersion pH after polymerization. As the acid used for such a purpose, any acid may be used as long as it does not adversely affect the water-soluble polymer in the aqueous phase and the dispersion form retention. Specific examples include succinic acid, acetic acid, citric acid, adipic acid and the like.

The amount of acid to be added is 30 mol% or more based on the amino group in the molecule of the cationic oil-soluble polymer in the water-in-oil monomer dispersion before polymerization or the water-in-oil polymer dispersion after polymerization. Added. Further, it is preferably 30 mol% or more and 1000 mol% or less, more preferably 50 mol% or more and 500 mol% or less.

The acid can be partially replaced by a monomer having an anionic group, that is, when an amphoteric water-soluble polymer is produced, a monomer containing a carboxyl group or a sulfone group is neutralized. Use as raw material without. The addition amount is 5-100 mol% with respect to the amino group in the molecule | numerator of a cationic oil-soluble polymer, Preferably it is 5-50 mol%. If too much is added, the performance of the cationic oil-soluble polymer is adversely affected. When the amount of acid is insufficient due to the monomer having an anionic group, the above-mentioned succinic acid, acetic acid, citric acid, adipic acid and the like are added as an additional acid.

The water-soluble polymer in the present invention is polymerized using a water-in-oil dispersion polymerization method or a water-in-oil emulsion polymerization method. The water-soluble polymer can be produced by any of cationic, amphoteric, nonionic and anionic. The water-in-oil dispersion polymerization method uses a monomer or a monomer mixture of two or more copolymerizable monomers as water, an oily substance comprising at least water-immiscible hydrocarbons, and water-in-oil. This is a method of synthesizing by mixing an effective amount for forming a mold emulsion and at least one surfactant having HLB, and stirring strongly to form a water-in-oil dispersion, followed by polymerization.

Examples of oily substances composed of hydrocarbons used as a dispersion medium include paraffins, mineral oils such as kerosene, light oil, and middle oil, or hydrocarbon-based synthetic oils having characteristics such as boiling point and viscosity in substantially the same range as these. Or a mixture thereof. As content, it is the range of 20 weight%-50 weight% with respect to the total amount of water-in-oil dispersion liquid, Preferably it is the range of 20 weight%-35 weight%.

Examples of at least one surfactant having an amount effective to form a water-in-oil dispersion and HLB are HLB 3 to 13 nonionic surfactants, specific examples of which are oil-soluble interfaces. Examples of the activator include sorbitan monooleate, sorbitan monostearate, sorbitan monopalmitate and the like. Nonionic water-soluble surfactants include polyoxyethylene alkyl ether, polyoxyethylene alcohol ether, and polyoxyethylene alkyl ester. Specifically, polyoxyethylene (20) sorbitan trioleate, polyoxyethylene (4) sorbitan monostearate, polyoxyethylene (5) sorbitan monooleate and the like. The addition amount of these surfactants is 0.5 to 10% by weight, preferably 1 to 5% by weight, based on the total amount of the water-in-oil emulsion.

After the polymerization, a hydrophilic interfacial modifier called a phase inversion agent is added to make the dispersed particles covered with the oil film easy to adjust to water, and the water-soluble polymer inside is easily dissolved as necessary. Dilute with water and use for each application. Examples of hydrophilic interfacial chemicals are cationic interfacial chemicals and nonionic interfacial chemicals of HLB 9-15, such as polyoxyethylene polyoxypropylene alkyl ether systems and polyoxyethylene alcohol ether systems. is there.

The dilution method of the water-soluble polymer high concentration liquid of the present invention is performed as follows. That is, as a means for mixing the high concentration liquid and water, a general line mixer can be used. A pump may be used instead of the line mixer. When dissolution is insufficient with one unit, two units can be connected in series. The line mixer is relatively inexpensive compared to a pump, has a simple structure, is light in weight, is easy to handle, and is very convenient to use. Specific examples include Kalman Mixer Series-F1, F2, F3, KS2, and KT2 manufactured by Chilling Industries Co., Ltd.

The water-soluble polymer in the present invention can be produced by any of cationic, amphoteric, nonionic and anionic, and can be produced by a water-in-oil dispersion polymerization method. The cationic water-soluble polymer can be produced by polymerization using a cationic monomer or a cationic monomer and a nonionic monomer. The amphoteric water-soluble polymer can be produced by polymerization using a cationic monomer, an anionic monomer and a nonionic monomer. The anionic water-soluble polymer can be produced by polymerization using an anionic monomer or an anionic monomer and a nonionic monomer.

Examples of the cationic monomer include dimethylaminoethyl (meth) acrylate and dimethylaminopropyl (meth) acrylamide, and examples of the quaternary ammonium group-containing polymer include the tertiary amino-containing monomer. (Meth) acryloyloxyethyltrimethylammonium chloride, (meth) acryloyloxy 2-hydroxypropyltrimethylammonium chloride, (meth) acryloylaminopropyltrimethylammonium chloride, ) Acryloyloxyethyldimethylbenzylammonium chloride, (meth) acryloyloxy 2-hydroxypropyldimethylbenzylammonium chloride, (meth) acryloylaminopropyldimethylbenzylammonium chloride, etc. .

Examples of the anionic monomer include methacrylic acid, acrylic acid, itaconic acid, maleic acid, vinyl sulfonic acid, vinyl benzene sulfonic acid, 2-acrylamido 2-methylpropane sulfonic acid, and salts thereof. These may be used alone or in combination of two or more.

Examples of the water-soluble nonionic monomer used include (meth) acrylamide, N, N-dimethylacrylamide, vinyl acetate, acrylonitrile, 2-hydroxyethyl (meth) acrylate, diacetone acrylamide, and N-vinylpyrrolidone. N-vinylformamide, N-vinylacetamide, acryloylmorpholine, acryloylpiperazine and the like.

For the water-soluble polymer of the present invention, methylene bisacrylamide or ethylene glycol di (meth) acrylate as a polyfunctional monomer having a plurality of vinyl groups, N, N- Dimethylacrylamide or the like can be applied.

The polymerization conditions are usually appropriately determined depending on the monomer used and the copolymerization mol%, and the temperature is 20 to 80 ° C., preferably 20 to 60 ° C. For the initiation of polymerization, a radical polymerization initiator is used. These initiators may be either oil-soluble or water-soluble, and can be polymerized by any of azo, peroxide, and redox systems. Examples of oil-soluble azo initiators are 2,2′-azobisisobutyronitrile, 1,1′-azobis (cyclohexanecarbonitrile), 2,2′-azobis (2-methylbutyronitrile), 2,2′-azobis (2-methylpropionate), 4,4-azobis (4-methoxy-2,4dimethyl) valeronitrile and the like.

Examples of water-soluble azo initiators include 2,2′-azobis (amidinopropane) dichloride, 2,2′-azobis [2- (5-methyl-2-imidazolin-2-yl) propane] And dihydrochloride, 4,4′-azobis (4-cyanovaleric acid), and the like. Examples of redox systems include a combination of ammonium peroxodisulfate and sodium sulfite, sodium hydrogen sulfite, trimethylamine, tetramethylethylenediamine, and the like. Further examples of peroxides include ammonium or potassium peroxodisulfate, hydrogen peroxide, benzoyl peroxide, lauroyl peroxide, octanoyl peroxide, succinic peroxide, t-butylperoxy 2-ethylhexanoate, and the like. I can give you.

It is possible to obtain a water-in-oil dispersion excellent in dissolution by the cationic oil-soluble polymer of the present invention. The reason why a water-in-oil dispersion excellent in dissolution according to the present invention is obtained is that when a cationic oil-soluble polymer that is water-dispersible by pH adjustment comes into contact with an aqueous phase that has been pH-adjusted by an acid. This is thought to be because the contact portion forms a salt, becomes water-dispersible (water-soluble), and strongly adsorbs to the aqueous phase.

(Examples) The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following examples.

(Synthesis Example 1) In a reaction vessel equipped with a stirrer and a temperature control device, 24.75 g of isoparaffin having a boiling point of 190 ° C. to 230 ° C., 5.48 g (30 mol%) of dimethylaminoethyl methacrylate (hereinafter abbreviated as DMM), lauryl Acrylate (12 carbon atoms, hereinafter abbreviated as LA) 19.52 g (70 mol%), 3-mercapto 1,2-propanediol 0.25 g, dimethyl-2,2-azobisisobutyrate (V made by Wako Pure Chemical Industries, Ltd.) -601) 0.5 g (2% by weight of monomer) was charged and dissolved. The temperature of the monomer solution was kept at 70 to 73 ° C., nitrogen substitution was performed for 30 minutes, and the polymerization reaction was started. The reaction was completed at a reaction temperature of 71 ± 2 ° C. for 5 hours to complete the reaction.

(Synthesis Example 2) In a reaction vessel equipped with a stirrer and a temperature controller, 5.50 g of sorbitan monooleate was charged and dissolved in 127 g of isoparaffin having a boiling point of 190 ° C to 230 ° C. Separately, 137.53 g of 80% aqueous solution of acryloyloxyethyltrimethylammonium chloride (hereinafter abbreviated as DMQ), 149.95 g of 50% aqueous solution of acrylamide (abbreviated as AAM), 0.32 g of 0.2% aqueous solution of methylenebisacrylamide, and 0.32 g of isopropyl alcohol. 37 g (0.2% by weight of monomer), 5.63 g of 80% aqueous solution of acetic acid, and 73.70 g of ion-exchanged water were each collected, mixed and completely dissolved. Thereafter, the oil and the aqueous solution were mixed, and stirred and emulsified with a homogenizer at 1000 rpm for 15 minutes. The monomer composition at this time is DMQ / AAM = 35/65 (mol%). The obtained emulsion was maintained at a temperature of the monomer solution at 40 to 43 ° C. and purged with nitrogen for 30 minutes, and then dimethyl-2,2-azobisisobutyrate (V-601, manufactured by Wako Pure Chemical Industries). 04 g (0.02% by weight of monomer) was added to initiate the polymerization reaction. The reaction was completed at a reaction temperature of 42 ± 2 ° C. for 12 hours to complete the reaction. After polymerization, the resulting water-in-oil emulsion was mixed with 10.0 g of polyoxyethylene polyoxypropylene alkyl ether (both body fluids: 2%) as a phase inversion agent. The water-in-oil emulsion viscosity after polymerization was 360 mPa · s, and the weight average molecular weight determined by the dynamic light scattering method was 7.7 million.

Samples 1 were prepared by adding 1% of the oil-soluble polymer of Synthesis Example 1 to the water-in-oil emulsion polymer of Synthesis Example 2 (in terms of the pure amount of the oil-soluble polymer relative to the total amount of the liquid). Sample 2 to which no polymer was added was designated as Sample-2.

Hereinafter, the line dissolution method was tested using the water-in-oil emulsion produced in the synthesis example. As shown in the flow sheet of FIG. 1, an apparatus for performing the dissolution system test of the present invention was assembled. The dilution water supply pump is operated, dilution water is supplied from the water tank at a rate of 20 L / min, the stock solution supply pump is operated, and 100 mL of the water-soluble polymer composed of the water-in-oil emulsion produced in the synthesis example from the stock solution tank. / Min. In this case, the dilution factor is 200 times. A sludge dewatering test was performed using the supplied solution to confirm the degree of dissolution. The residence time of the dissolved solution in the pipe is about 1 minute.

Excess human waste sludge was granulated and agglomerated with the above solution, and the resulting floc floc was subjected to gravity filtration and squeezing dehydration test. The properties of the test sludge are as follows. TS: 12,000 mg / L, VTS: 58.3% / TS, SS: 10,500 mg / L (200 mesh filtration) pH 7.05. 200 mL of the above sewage digested sludge was collected in a 300 mL beaker, and after adding the 200-fold solution of the water-in-oil emulsion consisting of the ionic water-soluble polymer, Sample-1, and Prototype-2, it was added at 1000 rpm using a high-speed stirrer. The mixture was stirred for 30 seconds to produce sludge aggregation floc, and the floc particle size was measured. Then, using a 40 mesh filter cloth as a filter, the dispersion liquid in which the sludge aggregation floc was generated was gravity filtered. The amount of each filtrate was measured after 5 and 10 seconds. Moreover, the external appearance of the obtained filtrate was visually evaluated in the following five stages.

Criteria for evaluating the appearance of the filtrate ○: Clearness of the filtrate is good, SS (suspended particles) is not found in the filtrate ○-: Good clarity of the filtrate, SS is seen in the filtrate Δ: The filtrate is cloudy, SS is not found in the filtrate Δ-: The filtrate is turbid and SS is seen in the filtrate X: The filtrate is very turbid and SS is seen in the filtrate

The obtained sludge cake was squeezed and dehydrated with a sludge dewatering test apparatus using nylon # 202 as a filter cloth under the conditions of 3.0 Kg / cm ² and 30 seconds, and the moisture content of the sludge cake was measured. The results are shown in Table 1.

(Comparative example) When Comparative Example 1-1 was used by dissolving the oil-soluble polymer-free Sample-2 in a line, Comparative Example 1-2 and Comparative Example 1-3 were lined up with Sample-1 and Sample-2. It is the case where it melt | dissolves at 800 rpm, 200 times, and 30 minutes by magnetic stirrer stirring in a beaker instead of melt | dissolving and using.

(Table 1)
Chemical dosage: Weight against sludge ppm, Flock diameter: mm,
Filtrate amount: mL, filtrate state; described in test conditions, moisture content: wt%

When Example 1 and Comparative Example 1-2 are compared, it can be seen that Sample-1 is dissolved in the same manner as beaker dissolution even when line dissolution is performed. It can be seen that Comparative Example 1-1 and Comparative Examples 1-3 to Sample-2 do not provide a sufficient dissolved state by line dissolution. It can be seen that Comparative Examples 1-3 to Sample-2 are effective in a sufficiently dissolved state. That is, it can be confirmed that the addition of the oil-soluble polymer makes the dissolution of the water-in-oil emulsion excellent.
As can be seen from the results of the above tests, the present invention enables a dissolution method that enables efficient line dissolution.

The figure showing the test flow sheet of the line dissolution method in an Example.

Explanation of symbols

b) Line mixer c) Product stock solution tank d) Diluted water tank e), f) Pump g), h), i), j) Valve

Claims (9)

A water-in-oil dispersion is a dilute solution of water-in-oil dispersion that is continuously dissolved by connecting means for mixing the water-in-oil dispersion and water in the middle of the pipe, the water-in-oil dispersion being a water-immiscible organic liquid, An oil characterized by being excellent in dissolution, containing an aqueous phase containing a water-soluble polymer, an acid, and a cationic oil-soluble polymer having structural units of the following general formulas (1) and (2) as essential components Diluent of medium water dispersion.
General formula (1)
Here, R1 is hydrogen or a methyl group, Q is a phenyl group, an aryl group having 7 to 18 carbon atoms, an alkyl group, COOR3 or CONHR4. Here, R3 and R4 are alkyl groups having 4 to 18 carbon atoms. R2 is hydrogen or an alkyl group having 1 to 3 carbon atoms.
General formula (2)
R5 is hydrogen or a methyl group, R6 and R7 are alkyl or alkoxyl groups having 1 to 3 carbon atoms, and R8 is hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group or a benzyl group, which may be the same or different. A represents an oxygen atom or NH, and B represents an alkylene group or alkoxylene group having 2 to 4 carbon atoms. X1 represents an anion. The cationic oil-soluble polymer is a copolymer of 50 to 95 mol% of an alkyl (meth) acrylate having an alkyl group having 4 to 18 carbon atoms and 5 to 50 mol% of a dialkylaminoalkyl (meth) acrylate. A dilute solution of a water-in-oil dispersion according to claim 1. With respect to the amino group in the molecule of the cationic oil-soluble polymer, the acid is added in a water-in-oil monomer dispersion before polymerization or in a water-in-oil polymer dispersion after polymerization to 30 mol% or more and 1000 mol. The diluted solution of the water-in-oil dispersion according to claim 1 or 2, characterized by being added in an amount of not more than%. The diluting liquid of the water-in-oil dispersion according to claim 1, wherein the mixing means is a line mixer. When preparing a dilution of a water-in-oil dispersion that continuously dissolves by connecting a means for mixing the water-in-oil dispersion and water in the middle of the pipe, the water-in-oil dispersion is a water-immiscible organic liquid. The aqueous phase containing a water-soluble polymer, an acid, and a cationic oil-soluble polymer having a structural unit represented by the following general formulas (1) and (2) as essential components are excellent in dissolution. A method for preparing a dilution of a water-in-oil dispersion.
General formula (1)
Here, R1 is hydrogen or a methyl group, Q is a phenyl group, an aryl group having 7 to 18 carbon atoms, an alkyl group, COOR3 or CONHR4. Here, R3 and R4 are alkyl groups having 4 to 18 carbon atoms. R2 is hydrogen or an alkyl group having 1 to 3 carbon atoms.
General formula (2)
R5 is hydrogen or a methyl group, R6 and R7 are alkyl or alkoxyl groups having 1 to 3 carbon atoms, and R8 is hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group or a benzyl group, which may be the same or different. A represents an oxygen atom or NH, and B represents an alkylene group or alkoxylene group having 2 to 4 carbon atoms. X1 represents an anion. The cationic oil-soluble polymer is a copolymer of 50 to 95 mol% of an alkyl (meth) acrylate having an alkyl group having 4 to 18 carbon atoms and 5 to 50 mol% of a dialkylaminoalkyl (meth) acrylate. 6. A method for preparing a dilution of a water-in-oil dispersion according to claim 5. With respect to the amino group in the molecule of the cationic oil-soluble polymer, the acid is added in a water-in-oil monomer dispersion before polymerization or in a water-in-oil polymer dispersion after polymerization to 30 mol% or more and 1000 mol. % Or less is added, The method of preparing the dilution liquid of the water-in-oil dispersion liquid of Claim 5 or 6 characterized by the above-mentioned. 6. The method for preparing a diluted liquid of a water-in-oil dispersion according to claim 5, wherein the mixing means is a line mixer. A method for using a dilution of a water-in-oil dispersion, wherein the dilution of the water-in-oil dispersion according to any one of claims 1 to 4 is added to organic sludge and dehydrated by a dehydrator. .