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Production method of copolymerized powdered cationic polyacrylamide

A polyacrylamide, cationic technology, applied in the field of chemical synthesis technology, can solve the problems of difficult control of reaction polymerization process, uncontrollable product quality, unstable aqueous solution, etc., to improve water solubility and stability, easy for industrial application, easy to control effects

Inactive Publication Date: 2009-06-17
赵吉滨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to control the reaction polymerization process, and it is not easy to control, and the quality of the product obtained from the polymerization is even more uncontrollable. The molecular weight of the product is medium, generally below 8 million, mostly between 3 million and 5 million, and the product has poor water solubility and a long water soluble time. , it takes 60-90 minutes, and the aqueous solution is unstable, and it will be hydrolyzed and deteriorated after 48 hours of storage, losing its due performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The production method of copolymerized powdery cationic polyacrylamide of the present invention is as follows:

[0019] (1) According to the type of cationic monomer used and its polymerization inhibitor composition, try to remove the polymerization inhibitor in the monomer, the polymerization inhibitor of dimethylaminoethyl acrylate chloride methane salt MC80 can be heated to 60 ° C for a certain period of time Removal is a routine method of operation.

[0020] (2) The acrylamide monomer is made into an aqueous solution with deionized water, generally prepared according to a weight concentration of 35%, and ion-exchanged with an ion-exchange column until the conductivity is less than 10us / cm, and its concentration is measured and calculated based on its concentration The amount of acrylamide required for 1 ton of mixed monomer aqueous solution is pumped into a temperature-adjustable stainless steel batching kettle with a stirring device, the amount of cationic monomer ...

Embodiment 2

[0033] The production method of copolymerized powdery cationic polyacrylamide of the present invention is as follows:

[0034] (1) According to the type of cationic monomer used and its polymerization inhibitor composition, try to remove the polymerization inhibitor in the monomer, the polymerization inhibitor of dimethylaminoethyl acrylate chloride methane salt MC80 can be heated to 60 ° C for a certain period of time remove.

[0035] (2) The acrylamide monomer is made into an aqueous solution with deionized water, generally prepared according to a weight concentration of 40%, and ion-exchanged with an ion-exchange column until the conductivity is less than 10us / cm, and its concentration is measured and calculated based on its concentration The amount of acrylamide required for 1 ton of mixed monomer aqueous solution is pumped into a temperature-adjustable stainless steel batching kettle with a stirring device, the amount of cationic monomer is measured according to the catio...

Embodiment 3

[0048]The production method of copolymerized powdery cationic polyacrylamide of the present invention is as follows:

[0049] (1) The acrylamide monomer is made into an aqueous solution with deionized water, generally prepared according to a weight concentration of 45%, and the amount of acrylamide required for 1 ton of mixed monomer aqueous solution is calculated based on its concentration, and pumped into a mixing tank with a stirring device In the temperature-regulated stainless steel batching kettle, measure the amount of cationic monomer dimethylaminoethyl acrylate chloride methane salt SMC according to the cationic molar ratio required by the reaction, add it to the acrylamide solution, and use deionized water to adjust the mixing in the batching kettle The monomer (mixture of two monomers) concentration was 45%.

[0050] (2) Adjust the temperature to 20°C to 30°C while stirring.

[0051] (3) Regulate the pH value of the mixed solution to 4 with hydrochloric acid or sod...

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PUM

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Abstract

A process for preparing the powdered cationic copolyacrylamide includes optically triggered polymerizing reaction between acrylamide and cationic monomer while adding chain regulating agent, drying and pulverizing. It features that the photosensitizer is added to the reaction liquid for optical trigger.

Description

technical field [0001] The invention relates to a new method for producing copolymerized powdery cationic polyacrylamide, which is a chemical synthesis technology. Background technique [0002] At present, the basic production method of copolymerized powdery cationic polyacrylamide is to prepare acrylamide monomer and cationic monomer into a certain concentration of aqueous solution to mix monomers, initiate free radical copolymerization with a chemical initiator, and then dry and pulverize the product . The initiation system generally adopts an oxidation-reduction system, or a composite initiation system composed of an oxidation-reduction system and an azo compound. It is difficult to control the reaction polymerization process, and it is not easy to control, and the quality of the product obtained from the polymerization is even more uncontrollable. The molecular weight of the product is medium, generally below 8 million, mostly between 3 million and 5 million, and the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/56C08F2/38
Inventor 赵吉滨
Owner 赵吉滨
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