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Chemical Polymerization Method of High Molecular Weight Cationic Polyacrylamide

A polyacrylamide, high molecular weight technology, applied in the field of high molecular weight cationic polyacrylamide chemical polymerization, can solve the problems of reduced molecular weight, inconsistent molecular weight, and unstable product quality.

Inactive Publication Date: 2011-12-21
SHENZHEN MUNICIPAL ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

Although the occurrence or acceleration of polymerization can be promoted by increasing the initiator, the molecular weight of the product will also decrease accordingly, failing to achieve the purpose of synthesizing high molecular weight products
Moreover, the amount of additional initiator added each time is based on whether the polymerization reaction is carried out or accelerated, and the amount added is also uncertain, resulting in inconsistent molecular weights of each batch of products, resulting in unstable product quality

Method used

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Examples

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no. 1 example

[0023] The first embodiment of the chemical polymerization method of high molecular weight cationic polyacrylamide of the present invention is characterized in that: the component weight of each polymerization of high molecular weight polyacrylamide is:

[0024] Solid acrylamide monomer: 490--520KG DAC cationic monomer: 104--124KG

[0025] Deionized water: 1356--1956KG Azo: 1. 6-2.0KG

[0026] Ammonium persulfate: 10--14g Ferrous ammonium sulfate: 6-10g.

[0027] And follow these steps for production:

[0028] 1. Add 1356--1956KG deionized water into the batching tank, and turn on the stirring device of the batching tank to stir;

[0029] 2. Adjust the temperature of the batching tank to 0.9-1.1°C;

[0030] 3. Add solid acrylamide monomer 490--520KG to the batching tank until the acrylamide monomer is completely dissolved;

[0031] 4. Add DAC cationic monomer 104--124KG until it is completely dissolved;

[0032] 5. Add azo: 1.6-2.0KG; stop stirring after completely dissol...

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Abstract

A high molecular weight cationic polyacrylamide chemical polymerization method, the weight of each polymerization component is: solid acrylamide monomer: 490-520kg; DAC cationic monomer: 104-124kg; deionized water: 1356-1956kg; : 1.6-2.0kg; ammonium persulfate: 10-14g; ferrous ammonium sulfate: 6-10g. Ammonium ferrous sulfate with a stable chemical structure is selected as an auxiliary agent for reducing the activation energy of the polymerization reaction. Make the polymerization reaction occur in a large amount at a relatively low temperature, even in the case of low temperature in winter, the polymerization reaction can be completed in about 4 hours, the production is smooth, the molecular weight of the product is stable, and the product has good solubility in water.

Description

【Technical field】 [0001] The present invention relates to a homopolymer or copolymer composition having one or more unsaturated aliphatic compounds, in particular to polyacrylamide, especially a chemical polymerization method for high molecular weight cationic polyacrylamide. 【Background technique】 [0002] The synthesis of cationic polyacrylamide generally adopts the method of high and low temperature two-stage initiation system polymerization. The persulfate-sodium bisulfite redox initiation system is often used for polymerization at lower temperatures. Since the polymerization between acrylamide monomers is an exothermic reaction, the temperature of the polymerization system gradually increases with the release of reaction heat. Under certain conditions, the initiation of the polymerization reaction is completed by azo. The higher the polymerization temperature, the smaller the molecular weight of the product. At the same time, if the highest polymerization temperature e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/34C08F4/40
Inventor 陈学明
Owner SHENZHEN MUNICIPAL ENVIRONMENTAL PROTECTION TECH
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