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Zwitterionic polyacrylamide and its preparation method and application

A polyacrylamide and zwitterionic technology, which is applied in the field of zwitterionic polyacrylamide and its preparation, can solve problems such as unfavorable particle sinking, poor flocculation effect, etc., and achieve large molecular weight and reduce residues , the effect of mild reaction conditions

Active Publication Date: 2020-05-12
罗山县中原聚合物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application range of zwitterionic polyacrylamide depends to a large extent on the relative molecular weight. High molecular weight PAM is an important flocculant, which has good adhesion to many microclusters and dissolved substances in sewage, but the existing Most of the zwitterionic polyacrylamides prepared by the method have low molecular weight, low viscosity and poor dissolution rate, which is not conducive to particle sinking, poor flocculation effect, and cannot meet industrial needs.

Method used

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  • Zwitterionic polyacrylamide and its preparation method and application

Examples

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Embodiment 1

[0033] This embodiment provides a preparation method of zwitterionic polyacrylamide, which comprises the following steps:

[0034] According to the mass ratio of 0.05:5:90 for one polymerization, weigh the photoinitiator, diallyldimethylammonium chloride and acrylamide monomer, mix the acrylamide monomer and deionized water to obtain a mass fraction of 17% acrylamide solution; at 13-30°C, mix the acrylamide solution, diallyldimethylammonium chloride, and photoinitiator evenly, and react for 2 hours to prepare cationic polyacrylamide glue Block; Wherein, the photoinitiator is azodiether propane hydrochloride;

[0035] In secondary polymerization, first crush the cationic polyacrylamide block, then add sodium hydroxide to the crushed cationic polyacrylamide at a mass ratio of 1000:1, and react at 70-80°C 2 h to prepare zwitterionic polyacrylamide.

Embodiment 2

[0037] This embodiment provides a preparation method of zwitterionic polyacrylamide, which comprises the following steps:

[0038] According to the mass ratio of 0.05:10:95 for one polymerization, weigh the redox initiator, dimethylamino diallyl ammonium chloride and acrylamide monomer, mix the acrylamide monomer and deionized water to obtain the mass The fraction is 20% acrylamide solution; at 12-30°C, mix the acrylamide solution, diallyldimethylammonium chloride, and redox initiator uniformly, and react for 3 hours to prepare cationic poly Acrylamide rubber block; Wherein, described redox initiator comprises ammonium persulfate and sodium bisulfite, and the mol ratio of ammonium persulfate and sodium bisulfite is 1:1;

[0039] In secondary polymerization, first crush the cationic polyacrylamide block, then add sodium hydroxide to the crushed cationic polyacrylamide at a mass ratio of 1000:3, and react at 70-80°C After 4 h, zwitterionic polyacrylamide was prepared, and the z...

Embodiment 3

[0041] This example provides a method for preparing zwitterionic polyacrylamide. The difference between this example and Example 2 is that the redox initiator includes potassium persulfate and sodium formaldehyde sulfoxylate, and the persulfate The molar ratio of potassium to sodium formaldehyde sulfoxylate is 1:2.

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Abstract

The invention provides zwitterionic polyacrylamide. The preparing method comprises the following steps of uniformly mixing an acrylamide solution with an initiator and a cationic monomer under the conditions of 13-30 DEG C, and conducting a reaction for 2-3 h to obtain a cationic type polyacrylamide gel slug; firstly conducting smashing treatment on cationic polyacrylamide, then adding inorganic base, and conducting a reaction at 70-80 DEG C for 2-4 h to obtain zwitterionic polyacrylamide. Meanwhile, the invention further provides zwitterionic polyacrylamide prepared through the method. Zwitterionic polyacrylamide has the advantages of being large in molecular weight and high in instant solubility, can be used as a flocculant applied to all fields, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of flocculants, and in particular relates to a zwitterionic polyacrylamide and its preparation method and application. Background technique [0002] As a water-soluble polymer product, zwitterionic polyacrylamide is widely used in sewage treatment, solid-liquid separation, anti-slump and fluid loss in drilling, polymer flooding in oil production industry, papermaking, textile, printing and dyeing, coal washing and other industries. Especially in sewage treatment as a flocculant, because of its wide range of suitable acidity values, it is more effective than cationic polyacrylamide. [0003] At present, the preparation method of zwitterionic polyacrylamide mainly uses the following two methods: [0004] The first is a two-step method. Firstly, acrylamide is homopolymerized to obtain nonionic polyacrylamide, and then the nonionic polyacrylamide is modified, such as amine methylation reaction and sulfomethylation reacti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F226/02C08F2/48C08F4/40C08F2/00C02F1/56
CPCC02F1/56C08F2/00C08F2/48C08F4/40C08F220/56C08F226/02
Inventor 余荣和余梦郭瀚程
Owner 罗山县中原聚合物有限公司
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