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Process for producing cation polyacrylamide

A technology of polyacrylamide and production process, which is applied in the field of production process of cationic polyacrylamide, can solve the problems of increasing production cost and equipment investment cost, affecting product performance stability, complicated production control, etc., and achieves reduction of production cost and Equipment investment cost, deodorization and elimination of some harmful bacteria, and the effect of easy control of the reaction

Inactive Publication Date: 2009-02-25
SICHUAN TONGFENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method all increases the production cost and equipment investment cost, and due to the addition of various additives, the production control is more complicated, thus affecting the stability of product performance

Method used

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  • Process for producing cation polyacrylamide
  • Process for producing cation polyacrylamide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The raw materials of each raw material are calculated by mass percentage:

[0016] Acrylamide 10.0

[0017] Acryloyloxyethyltrimethylammonium chloride 5.05

[0018] Redox agent (potassium persulfate: trimethylamine=1:1) 0.4

[0019] Azobisisobutyronitrile 0.03

[0020] Urea 0.5

[0021] Sodium formate 0.02

[0022] Deionized water 84.0

[0023] The operation steps are: add deionized water into the reactor, feed nitrogen gas until the oxygen saturation is ≤5%, add acrylamide, acryloyloxyethyltrimethylammonium chloride, urea and sodium formate in sequence, and adjust the pH value to 6.0, by injecting nitrogen and keeping the oxygen saturation ≤ 5%, add redox agent, react under nitrogen protection conditions for 43 minutes, then add azobisisobutyronitrile, continue to react for 60 minutes, then react again at 60°C After 4 hours, the copolymer colloid was obtained, cooled to room temperature, granulated, and dried at 60-70°C to obtain cationic polyacrylamide. Its per...

Embodiment 2

[0025] The raw materials of each raw material are calculated by mass percentage:

[0026] Acrylamide 25.0

[0027] Acryloyloxyethyltrimethylammonium chloride 6.98

[0028] Redox agent (potassium persulfate: dimethyloctylamine = 1: 1) 0.02

[0029] Azobisamidinopropane 0.15

[0030] Urea 2.2

[0031] Sodium propionate 0.15

[0032] Deionized water 65.5

[0033] The operation steps are: add deionized water into the reactor, feed nitrogen until the oxygen saturation is ≤5%, add acrylamide, acryloyloxyethyltrimethylammonium chloride, urea and sodium propionate in sequence to adjust the pH value to 6.5, by feeding nitrogen and keeping the oxygen saturation ≤ 5%, adding a redox agent, reacting under the condition of nitrogen protection for 45 minutes, then adding azobisamidinopropane, continuing the reaction for 50 minutes, at 50 ° C React for another 4.5 hours to obtain copolymer colloid, cool to room temperature, granulate, and dry at 60-70°C to obtain cationic polyacrylamid...

Embodiment 3

[0035] The raw materials of each raw material are calculated by mass percentage:

[0036] Acrylamide 14.5

[0037] Acryloyloxyethyltrimethylammonium chloride 10.0

[0038] Redox agent (potassium persulfate: triethanolamine=1:1) 0.3

[0039] 2. 2-azobis(2-amidinopropane) 0.1

[0040] Urea 5.0

[0041] Sodium butyrate 0.1

[0042] Deionized water 70.0

[0043] The operation steps are: add deionized water into the reactor, feed nitrogen until the oxygen saturation is ≤5%, add acrylamide, acryloyloxyethyltrimethylammonium chloride, urea and sodium butyrate in sequence, adjust When the pH value reaches 7, enter nitrogen and keep the oxygen saturation ≤ 5%, add a redox agent, react for 47 minutes under the condition of nitrogen protection, then add 2,2 azobis(2-amidinopropane) to continue the reaction After 60 minutes, react at 40°C for another 5 hours to obtain copolymer colloid, cool to room temperature, granulate, and dry at 60-70°C to obtain cationic polyacrylamide. Its p...

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Abstract

The invention provides a technique for producing cationic polyacrylamide, and comprises the raw materials by mass percent: 10.0 to 25.0% of acrylamide, 5.0 to 10.0% of acryloxyethyl trimethylammonium chloride, 0.02-0.04% of redox, 0.03-0.015% of azo compound, 0.5 to 5.0 of urea, 0.02 to 0.15% of fatty acid salt, and 65.5-84% of deionized water; the raw materials are put into a reactor and added with the redox to have induced polymerization reaction under nitrogen protection at the room temperature, and then added with the azo compound to have secondary induced polymerization reaction; finally, the products of the invention are obtained after granulation and dryness. The technique is stable, slow in induction, even in reaction, mild and ordered, and easy in the control of operation process; the obtained products are rapid in dissolution rate, little in usage, large in water yield, big and dense in floccules, and not easy in fragmentation. The technique is mainly used for various environment-friendly fields such as sewage disposal, sludge dewatering, etc.

Description

technical field [0001] The invention relates to a production process of a polymer, in particular to a production process of cationic polyacrylamide. Background technique [0002] Cationic polyacrylamide has been widely used in the field of environmental protection as an effective flocculant for sewage treatment and sludge dehydration. In the process of producing cationic polyacrylamide, due to the difference in production process, the molecular weight, molecular order, charge intensity in the molecule, and charge density and distribution of the product cationic polyacrylamide will have great differences, which will directly affect the flocculation. Precipitation effect, dehydration performance and application effect. At present, cationic polyacrylamide is mainly synthesized by copolymerization reaction. Chinese patent CN1824682A discloses a preparation method of ultra-high molecular weight cationic polyacrylamide. The comonomer acrylamide (AM) and acryloyloxyethyltrimethyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F2/00C08F4/40C08F4/04C08F220/34
Inventor 孙玉梅陈家任韩中文许建光颜成功童佳琼
Owner SICHUAN TONGFENG TECH
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