Preparation for water soluble high-molecular weight cationic polymer

A cationic polymer, high molecular weight technology, applied in the field of water-soluble high molecular weight cationic polymer, can solve the problems of low purity, low molecular weight, poor water solubility, etc., and achieve the effect of simple polymerization process

Active Publication Date: 2005-12-28
HAISO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low activity of domestic METMAC and AETMAC monomers, especially the low purity, the obtained METMAC or AETMAC and acrylamide copolymers have small intrinsic viscosity, low molecular weight, low cationic degree, poor water solubility, and small flocculation effect. Ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 30g of acrylamide, 0.5g of 2-acryloyloxyethyltrimethylammonium chloride, and 70g of deionized water, add them into a three-neck flask, stir and mix evenly, and prepare a solution with a required monomer concentration of 30wt%; Add 0.004g of disodium diaminetetraacetic acid, 0.005g of sodium formate, 0.0025g of sodium perborate, and 0.002g of ammonium persulfate (APS) into a three-necked flask; place the three-necked flask in a constant temperature water bath at 30°C, and pass through nitrogen to remove oxygen for 15 Minutes later, add 0.004 g of sodium bisulfite, continue to pass nitrogen for 5 minutes, and pass nitrogen protection; after standing for 5 hours, take out the rubber block, granulate, dry, crush, and sieve to obtain 20-100 mesh, Intrinsic viscosity 23.4dl / g white powder cationic polymer product (intrinsic viscosity [η] is measured at 25±0.05°C in 1mol / L NaCl aqueous solution).

Embodiment 2

[0019] Weigh 75g of 2-acryloyloxyethyltrimethylammonium chloride, 0.7g of acrylamide, and 25g of deionized water, add them into a three-necked flask, stir and mix evenly, and prepare a solution with a required monomer concentration of 60wt%. Add 0.002g of disodium diamine tetraacetate, 0.002g of sodium formate, 0.0015g of sodium perborate, and 0.0015g of ammonium persulfate (APS) into a three-necked flask; place the three-necked flask in a constant temperature water bath at 30°C, and pass through nitrogen to remove oxygen for 15 Minutes later, add 0.003 g of sodium thiosulfate, continue to pass nitrogen for 5 minutes, and pass nitrogen protection; after standing for 24 hours, take out the rubber block, granulate, dry, crush, and sieve to obtain 20-100 mesh, Intrinsic viscosity 15.2dl / g white powder cationic polymer product.

Embodiment 3

[0021] Weigh 21.33g of acrylamide and 35.5g of 2-methyl-acryloyloxyethyltrimethylammonium chloride, add deionized water to prepare a total liquid volume of 100g, add them into a three-necked flask, stir and mix evenly, and prepare the required single Body concentration is the solution of 44wt%; Disodium edetate 0.0005g, ascorbic acid 0.0005g, sodium formate 0.002g, sodium perborate 0.002g, ammonium persulfate (APS) 0.0015g are added in the there-necked flask; Place in a constant temperature water bath at 30°C, pass nitrogen to remove oxygen for 15 minutes, add 0.003 g of sodium bisulfite, continue to pass nitrogen for 5 minutes, and pass nitrogen protection; after standing for 20 hours, take out the rubber block, granulate, Dry, pulverize, and sieve to obtain a white powder cationic polymer product with 20-100 mesh and intrinsic viscosity of 13.4dl / g.

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PUM

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Abstract

The invention provides a preparation method of a water-soluble high molecular weight cationic polymer. The method adopts a multi-component composite redox initiation system, adds a variety of additives, and initiates the copolymerization of methacryloyloxyethyltrimethylammonium chloride or acrylamide acryloyloxyethyltrimethylammonium chloride and acrylamide aqueous solution. A water-soluble cationic polymer powder product with an intrinsic viscosity of 13.4-23.4dl / g is prepared, the molar content of METMAC or AETMAC in the polymer is 0.5%-99.5%, and the residual monomer content is ≤0.1wt%. The present invention is characterized in that domestic industrial-grade monomers are directly used as raw materials without refining, and the obtained high molecular weight polymer has a cationic degree of 50-99.5%. The product can be used as clay stabilizer, inverse demulsifier, corrosion inhibitor in petroleum engineering, strengthening agent in papermaking industry, papermaking wastewater treatment agent, water treatment agent in environmental protection, sludge dehydrating agent, etc.

Description

technical field [0001] The invention relates to a method for preparing a water-soluble high-molecular-weight cationic polymer through the copolymerization of methacryloyloxyethyltrimethylammonium chloride or acryloyloxyethyltrimethylammonium chloride and acrylamide. Background technique [0002] The compound with structural formula (1) can be used for the monomer of synthesizing water-soluble cationic polymer [0003] I [0004] In the formula: M represents the cationic center atom, which can be nitrogen, phosphorus and sulfur atoms (when it is a sulfur atom, only three hydrocarbon groups are used); R 1 , R 2 , R 3 , and R 4 Represents a hydrocarbon group (or a hydrogen atom), at least one of which is an unsaturated olefin group or a reactive epoxy hydrocarbon group. In most cases, at least two of the 4 hydrocarbon groups are the same. The olefin group can be long or short, and the carbon The number varies from 2 to 40, preferably in the range of 2 to 12, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/40C08F220/56
Inventor 蒋拥华李绵贵
Owner HAISO TECH
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