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Preparation method of water-in-water cation polyacrylamide

A polyacrylamide, cationic monomer technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor fluidity, long synthesis time, low safety, etc., to achieve a wide range of applications, long storage time, safe operation high sex effect

Inactive Publication Date: 2010-06-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are only a few domestic patents related to the synthesis of cationic polyacrylamide by dispersion polymerization, but there are problems such as long synthesis time, poor fluidity and low safety during the reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 72g of deionized water, 5.5g of sodium chloride, 17g of acrylamide, 6g of methacryloyloxyethyltrimethylammonium chloride (concentration 80%) solution, 99.5g self-made dispersion stabilizer, 4g ethylenediaminetetraacetic acid disodium salt (concentration is 1%) solution; constant temperature 50 ℃, stirring 1000rpm, blowing nitrogen to remove oxygen in the system. Add 4mL of 1wt% potassium persulfate solution after passing nitrogen for half an hour, start for the second time after 1 hour, add 4mL of 1wt% potassium persulfate solution, react after 4 hours and discharge to obtain a uniform milky white liquid product.

Embodiment 2

[0041] Add 62g of deionized water, 15.5g of ammonium sulfate, 21g of acrylamide, 12g of methacryloxyethyltrimethylammonium chloride (concentration of 80%) solution, 99.5g self-made dispersion stabilizer, 4g ethylenediaminetetraacetic acid disodium salt (concentration is 1%) solution; constant temperature 50 ℃, stirring 1000rpm, blowing nitrogen to remove the oxygen in the system. Add 4mL of 1wt% potassium persulfate solution and 3mL of 1wt% sodium bisulfite solution after passing nitrogen for half an hour, carry out the second initiation after 1 hour, add 4mL of 1wt% potassium persulfate solution and 3mL of 1wt% sulfurous acid Sodium hydrogen solution, after the reaction lasted for 4 hours, the material was discharged to obtain a uniform milky white liquid product.

Embodiment 3

[0043] Add 72g deionized water, 15.5g ammonium sulfate, 17g acrylamide, 24g dimethyl diallyl ammonium chloride (concentration is 62%) in the four-necked flask that is equipped with condenser tube, thermometer, nitrogen inlet and stirring paddle Solution, 99.5g self-made dispersion stabilizer, 4g ethylenediaminetetraacetic acid disodium salt (concentration is 1%) solution; constant temperature 50 ℃, stirring 1000rpm, blowing nitrogen to remove oxygen in the system. Add 4mL of 1wt% potassium persulfate solution after passing nitrogen for half an hour, start for the second time after 1 hour, add 4mL of 1wt% potassium persulfate solution, react after 4 hours and discharge to obtain a uniform milky white liquid product.

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PUM

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Abstract

The invention relates to a method for synthesizing water-in-water cation polyacrylamide. The method takes an inorganic salt water solution as a reaction medium, adopts a mixed dispersion stabilizing agent containing polyethylene glycol PEG series, polyvinylpyrrolidone and polyvinyl alcohol (the mass ratio of the polyethylene glycol PEG series to the polyvinylpyrrolidone to the polyvinyl alcohol is 1:1:1) and enables acrylamide and a quaternary ammonium organic compound with double bonds to generate a free radical copolymerization reaction so as to generate water-in-water cation polyacrylamide emulsion. The preparation method of the water-in-water cation polyacrylamide comprises the following steps: (A) adding acrylamide, a cationic monomer, inorganic salt, a dispersant, a screening agent and deionized water into a four-neck flask, dissolving evenly, putting into water bath of 50 DEG C, introducing nitrogen, deoxidizing and stirring at the speed of 1000rpm; (B) when reacting for 0.5 hour and 1.5 hours respectively, adding a certain amount of initiator; and (C) after adding the initiator for the second time, reacting for 3-4 hours continuously so as to obtain a product. The emulsion has the characteristics of high dissolving speed, good stability and convenient use and transportation and can not cause secondary pollution to the environment.

Description

technical field [0001] The present invention relates to the synthetic method of macromolecular compound cationic polyacrylamide, especially relate to a kind of synthetic method of " water in water " type cationic polyacrylamide. Background technique [0002] Polyacrylamide (PAM for short) is a water-soluble polymer widely used as a synthetic polymer flocculant. According to the different types of sewage to be treated, a series of ionic, nonionic and amphoteric polyacrylamines with different charges have been developed at home and abroad, among which cationic polyacrylamide (CPAM) is widely used due to its wide application range. The influence of coexisting salt is small, and the negatively charged colloidal particles and other pollutants can be destabilized and removed through the two functions of adsorption neutralization and adsorption bridging at the same time, and are widely used in petroleum exploration, papermaking, metallurgy, mining, etc. , textile printing and dyei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F226/02C08F220/34C08F2/30C08F4/40C02F1/56
Inventor 徐冉李风亭王梓贾敏陈书怡孙宇翔
Owner TONGJI UNIV
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