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Method for producing high polymer polyacrylamide adapted to paper-making black liquor processing

A technology of polyacrylamide and its manufacturing method, which is applied in papermaking, textile and papermaking, fiber raw material processing, etc., can solve the problems of obvious degradation of polyacrylamide, and achieve the effect of meeting the processing requirements and solving the obvious degradation

Inactive Publication Date: 2007-06-06
SHANDONG POLYMER BIO CHEM CO LTD
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Problems solved by technology

[0003] The object of the present invention is to aim at the above-mentioned defects existing in the prior art, to provide a kind of solution that solves the problem of obvious degradation of common polyacrylamide in black liquor treatment, so as to meet the processing requirements of papermaking black liquor and is suitable for the treatment of papermaking black liquor. Production method of polymer polyacrylamide

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  • Method for producing high polymer polyacrylamide adapted to paper-making black liquor processing

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Embodiment Construction

[0014] In conjunction with accompanying drawing, the present invention is further described:

[0015] Pure water is added to the refined acrylamide monomer in the preparation kettle to adjust the concentration to 21.0-25.0%, and soda ash with a pure monomer content of 9-14% is uniformly added to the preparation kettle. And feed the refrigerant water or steam to adjust the temperature of the monomer solution to 5-12 degrees. The monomer solution is sent into the polymerization tank, and the pressure is above 0.4Mpa, and the nitrogen gas with a purity of 99.95% is introduced. After 15 minutes, add disodium EDTA solution and sodium formate solution. After nitrogen gas for 10 minutes, add the prepared initiator, after nitrogen gas for 10 minutes, add potassium persulfate solution, after nitrogen gas for 15 minutes, add the prepared sodium bisulfite solution, after nitrogen gas for 25 minutes, close the polymerization kettle When the nitrogen pressure in the polymerization kettle...

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Abstract

The present invention relates to a preparation method of high-molecular polyacrylamide for treating paper-making black liquor. Said preparation method includes the following steps: (1), adding soda into acrylamide aqueous solution whose concentration is 21.0%-25.0% and regulating temperature to 5-12 deg.C; (2), introducing nitrogen gas and adding chemicals and initiator, making polymerization reaction, when the temperature is risen to about 70-90 deg.C, introducing steam to make hydrolysis, after 1-4 hours of hydrolysis forming colloidal block; and (3), using granulating machine to make granulation, drying, and adding stabilizing agent and tack-producing agent, grinding and screening so as to obtain the invented final product.

Description

1. Technical field: [0001] The invention relates to a production method of high-molecular polyacrylamide series products, in particular to a production method of high-molecular polyacrylamide suitable for papermaking black liquor treatment. 2. Background technology: [0002] At present, there are many polyacrylamide products produced in China, and the processes adopted are also different. The molecular weight is the highest, but the hydrolysis after homopolymerization is more complex than the cohydrolysis process of homopolymerization, and the production equipment is more and it is easier to corrode the equipment. At the same time, the polyacrylamide produced by the above several processes is prone to hydrolysis reaction in alkaline high-temperature environment. With the hydrolysis of polyacrylamide, the content of carboxylic acid groups increases, the main chain is easy to degrade under high temperature environment, and the viscosity drops significantly. . Papermaking bla...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C11/00
Inventor 夏春良吴时军刘皓周卫东李岳军孙中华
Owner SHANDONG POLYMER BIO CHEM CO LTD
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