Hydrolysis method in technique for synthesizing polyacrylamide with super molecular weight

Abstract

A hydraulic process for synthesizing the ultrahigh-molecular polyacrylamide used to treat the sewage in oil field includes polymerizing reaction of the acquous solution of acrylamide to become colloid, granulating, proportionally mixing it with solid alkali, and stirring in stirrer while heatinb by the hot water jacket of stirrer. Its molecular weight can reach 28,000,000.

Description

Technical field: [0001] The invention relates to the hydrolysis and granulation process in the production process of polyacrylamide series products, specifically, it is a hydrolysis method in the synthesis process technology of ultra-high molecular weight polyacrylamide. Background technique: [0002] At present, there are three methods for synthesizing polyacrylamide: ① Homopolymerization and co-hydrolysis process. Although the process is simple, this method has the disadvantages of high raw material purity requirements, fast polymerization chain termination, and difficulty in producing high molecular weight products. The general molecular weight is 500. ~1500; ②copolymerization process, although this method does not require hydrolysis, it has high requirements on the purity of raw materials, especially acrylamide, and it is difficult to obtain high molecular weight products. ; ③Post-polymerization hydrolysis process, although the method does not require high purity of raw ...

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Problems solved by technology

[0002] At present, there are three methods for synthesizing polyacrylamide: ① Homopolymerization and co-hydrolysis process. Although the process is simple, this method has the disadvantages of high raw material purity requirements, fast polymerization chain termination, and difficulty in producing high molecular weight products. The general molecular weight is 500. ~1500; ②copolymerization process, although this method does not require hydrolysis, it has high requirements on the purity of raw materials, especially acrylamide, and it is difficult to obtain high molecular weight products. ; ③Post-polymerization hydrolysis process, although the method does not require high purity of raw materials, but because polyacrylamide is a poor conductor of heat, the temperature is difficult to reach the hydrolysis conditions, and polyacrylamide with higher molecular weight cannot be obtained. reached 24 million

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