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Aqueous phase cation polyacrylamide emulsion one-step synthesis method

A technology of polyacrylamide and acrylamide monomer, which is applied in the field of synthesizing water-phase cationic polyacrylamide emulsion, which can solve the problems of energy consumption and prolongation of production time, and achieve the effects of reducing energy consumption, improving efficiency and reducing production equipment

Inactive Publication Date: 2009-11-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology uses powdered dispersant, and the process of preparation, drying and pulverization of powdery dispersant will lead to prolongation of production time and energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The polymerization formula is shown in Table 1.

[0021] (1) Add deionized water and methacryloyloxyethyltrimethylammonium chloride monomer (DMC) into the reaction flask, stir and blow nitrogen to exhaust oxygen.

[0022] (2) Add azobisisobutylamidine hydrochloride (AIBA) and react at 50° C., stirring at 300 rpm and blowing nitrogen for 6 hours.

[0023] (3) Add ammonium sulfate, acrylamide monomer and DMC, adjust the temperature to 50°C, stir at 170 rpm, and react for 24 hours. After the reaction is completed, the product in the form of an emulsion in water phase is obtained after discharge.

[0024] The resulting final polymer product was a viscous, flowable, opaque liquid. The polymer content in the product was 12.6%. The monomer conversion rate measured according to GB12005.3-89 was 95%; the intrinsic viscosity of the obtained polymer measured according to GB12005.1-89 was 832ml / g.

[0025] Table 1

[0026] components

Embodiment 2

[0028] The polymerization formula is shown in Table 2.

[0029] (1) Add deionized water and methacryloyloxyethyltrimethylammonium chloride monomer (DMC) into the reaction flask, stir and blow nitrogen to exhaust oxygen.

[0030] (2) Potassium persulfate was added and reacted for 6 hours at 50° C., stirring at 300 rpm and flowing nitrogen.

[0031] (3) Add ammonium sulfate, sodium chloride, acrylamide and DMC, adjust the temperature to 45°C, stir at 204rpm, and react for 12 hours. After the reaction is completed, the product in the form of an emulsion in water phase is obtained after discharge.

[0032] The resulting final polymer product was a viscous, flowable, opaque liquid. The polymer content in the product was 8.3%. The monomer conversion rate measured according to GB12005.3-89 was 99%; the intrinsic viscosity of the obtained polymer measured according to GB12005.1-89 was 525ml / g.

[0033] Table 2

[0034] components

Embodiment 3

[0036] The polymerization formula is shown in Table 3.

[0037] (1) Add deionized water and methacryloyloxyethyltrimethylammonium chloride monomer (DMC) into the reaction flask, stir and blow nitrogen to exhaust oxygen.

[0038] (2) Add ammonium persulfate and react at 45°C for 9 hours with stirring at 300 rpm and nitrogen flow.

[0039] (3) Add ammonium sulfate, potassium chloride, acrylamide and DMC, adjust the temperature to 45°C, stir at 140rpm, and react for 24 hours. After the reaction is completed, the product in the form of an emulsion in water phase is obtained after discharge.

[0040] The resulting final polymer product was a viscous, flowable, opaque liquid. The polymer content in the product was 17.4%. The monomer conversion rate measured according to GB12005.3-89 was 97%; the intrinsic viscosity of the obtained polymer measured according to GB12005.1-89 was 478ml / g.

[0041] table 3

[0042] components

[0043] ammonium sulfate

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PUM

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Abstract

The invention discloses a method used for synthesizing aqueous phase cation polyacrylamide emulsion by one step. The method is characterized in that polymerization adopts free radical evocating agent, firstly dispersant (such as poly methacrylatoethyl trimethyl ammonium chloride) is synthesized in aqueous solution, then inorganic salt, acrylamide monomer and a cationic monomer (such as methacrylatoethyl trimethyl ammonium chloride) are added for aqueous phase dispersion polymerization, thus obtaining aqueous phase emulsion cation polyacrylamide. The dispersion stabilizer of the invention is formed by in-situ polymerization in the aqueous solution, the obtained polymer aqueous solution is directly used as stabilizer component for aqueous phase dispersion polymerization of acrylamide and can be part objective product, and one-step preparation technique which contains the processes from feeding raw material to obtaining cation polyacrylamide aqueous base emulsion is realized. The method effectively reduces production device, improves raw material utilization factor, reduces energy consumption and cost and improves efficiency without using organic solvent, thus being safe and environmentally friendly.

Description

technical field [0001] The invention relates to a method for synthesizing water-phase cationic polyacrylamide emulsion in one step. Background technique [0002] The industrial preparation of polyacrylamide and its copolymers mainly adopts homogeneous aqueous solution polymerization, inverse emulsion polymerization and inverse dispersion polymerization. Among them, aqueous solution polymerization is the most widely used, with safe production and low cost, but it needs to be granulated and dried to obtain powdery polyacrylamide products, which consumes a lot of energy; inverse emulsion polymerization and inverse dispersion polymerization products have good solubility, but production The process requires the use of a large amount of hydrocarbon organic solvents, with high costs, explosion risks, and environmental issues. [0003] Aqueous phase dispersion polymerization is a special type of precipitation polymerization, and it is one of the newer polymerization implementation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F226/04C08F220/34C08F2/20
Inventor 陈晓农吴丙照苏志强石淑先
Owner BEIJING UNIV OF CHEM TECH
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