Preparation method of cationic polyacrylamide

A technology of polyacrylamide and cation, which is applied in the direction of flocculation/sedimentation water/sewage treatment, dehydration/drying/concentrated sludge treatment, etc. It can solve problems such as unsuitable production and application, difficult removal of product purity, long reaction and polymerization time, etc. , achieve the effect of shortening the initiation polymerization time, short polymerization reaction time and low price
CN102603970BActive Publication Date: 2014-04-09贾高锋 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
贾高锋
Publication Date
2014-04-09
Patent Text Reader

Abstract

The invention relates to a preparation method of cationic polyacrylamide. The cationic polyacrylamide is prepared by the following steps of: adding a certain amount of solubilizing agent and complexing agent into acrylamide (AM) and aqueous solution of two cationic monomers; regulating the pH value of a reaction system; then adding a certain amount of initiator; and performing the polymerization reaction under the ultraviolet light with a certain wavelength. The preparation method has the advantages that the polymerization reaction time is short; few types of auxiliaries are added; and the prepared product has high purity and is non-toxic and harmless. The cationic polyacrylamide obtained by the preparation method has multifunctionality, has the molecular weight of 1 million to 12 million, has ultralow concentration of a residual acrylamide monomer, is suitable for treatment of drinking water and sewage treatment and dehydration treatment of sludge and has excellent application prospect.
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Description

technical field

[0001] The invention relates to a method for preparing an aqueous solution polymer, in particular to a method for preparing a cationic polyacrylamide. Background technique

[0002] At present, the flocculants used in sewage treatment plants mainly include inorganic flocculants and organic polymer flocculants. Polyacrylamide flocculant is an important organic polymer flocculant, including cationic polyacrylamide (CPAM), anionic polyacrylamide (APAM), nonionic polyacrylamide (NPAM) and zwitterionic polyacrylamide; among them, Cationic polyacrylamide (CPAM) is its high-end product. It has the advantages of excellent turbidity removal and decolorization performance. Most of the products produced by the current preparation method are affected by the use of too many additives, which affects the purity of the product and the synthesis reaction is insufficient. The monomer content is relatively large, and the residual monomer content of acrylamide after refining is ...

Claims

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