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Anionic polyacrylamide as well as preparation method and application thereof

A technology of polyacrylamide and acrylamide monomer, which is applied in the field of anionic polyacrylamide and its preparation and application, can solve the problems of low solid content of flocculant, long dissolution time, large usage, etc., and achieve the improvement of relative molecular weight and Solid content, high solid content, the effect of reducing the viscosity of the system

Active Publication Date: 2012-07-11
SHANGHAI EMPEROR OF CLEANING HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of low solid content, small molecular weight, long dissolution time, large usage amount and high cost of existing industrial wastewater treatment flocculants, and special screening for anionic polyacrylamide flocculants A kind of preparation method, the anionic polyacrylamide prepared by it and its application

Method used

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  • Anionic polyacrylamide as well as preparation method and application thereof
  • Anionic polyacrylamide as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) first acrylamide monomer and polyethylene oxide dispersant with a relative molecular weight of 50000 are mixed in a mass ratio of 1:2, then water is added to make the content of acrylamide monomer 25%;

[0026] (2) Add anionic monomer acrylic acid with 20% mass of acrylamide monomer and 6% cerium nitrate, and polymerize at 70° C. for 6 hours after adding the medicine.

[0027] The obtained product is kept warm for 24 hours, and the moisture is completely volatilized. After testing, the solid content is 93%, and the relative molecular weight is 25 million, which can be used as a high-efficiency industrial wastewater flocculant. At the same time, the solubility of the product was tested, 2g of the polymer was added into 100g of water, stirred gently, and quickly dissolved into a transparent solution.

Embodiment 2

[0029] (1) First, the acrylamide monomer is mixed with a polyethylene oxide dispersant with a relative molecular weight of 10000 in a mass ratio of 1:0.5, and then water is added to make the content of the acrylamide monomer 10%;

[0030] (2) Add anionic monomer methacrylic acid with 15% mass of acrylamide monomer and 0.8% praseodymium nitrate, and polymerize at 40° C. for 4 hours after adding the medicine.

[0031] The obtained product is kept warm for 24 hours, and the moisture is completely volatilized. After testing, the solid content is 90%, and the relative molecular weight is 18 million, which can be used as a more efficient industrial wastewater flocculant. At the same time, the solubility of the product was tested, 2g of the polymer was added into 100g of water, stirred gently, and quickly dissolved into a transparent solution.

Embodiment 3

[0033] The acrylamide monomer in step (1) is mixed with the polyethylene oxide dispersant with a relative molecular weight of 10000 in a mass ratio of 1:0.5, and then water is added to make the content of the acrylamide monomer 10%. All the other conditions are the same as in Example 1.

[0034] The obtained product is kept warm for 24 hours, and the moisture is completely volatilized. After testing, the solid content is 90%, and the relative molecular weight is 23 million, which can be used as a high-efficiency industrial wastewater flocculant. At the same time, the solubility of the product was tested, 2g of the polymer was added into 100g of water, stirred gently, and quickly dissolved into a transparent solution.

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Abstract

The invention discloses a preparation method of anionic polyacrylamide, which comprises the following steps that: in aqueous solution, in the presence of dispersing agent and salt of rare earth element, acrylamide monomer polymerizes with anionic monomer acrylic acid or methacrylic acid. The invention also discloses the anionic polyacrylamide prepared by the preparation method and the application of the anionic polyacrylamide. The operation of the preparation method is simple, the preparation method is friendly to the environment, the relative molecular mass and the solid content of the product are improved, and the viscosity of the system is reduced. The anionic polyacrylamide prepared by the method can be used as a flocculant, has good solubility, and can be quickly dissolved in water.

Description

technical field [0001] The invention specifically relates to an anionic polyacrylamide and its preparation method and application. Background technique [0002] The polyacrylamide molecular chain contains a certain amount of polar groups, which can absorb solid particles suspended in water, and bridge the particles to form large flocs. For suspended particles, anionic polyacrylamide is relatively thick, high in concentration, and positively charged. , The pH value of the water is neutral or alkaline, and the wastewater has a strong adsorption effect. Due to the acceleration of the settling of particles in the suspension, it has a very obvious effect of accelerating the clarification of the solution and promoting filtration. Anionic polyacrylamide is widely used in the treatment of chemical industrial wastewater and waste liquid. [0003] Anionic polyacrylamide can be prepared by free radical aqueous solution polymerization, inverse emulsion polymerization, inverse suspensio...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F4/12C02F1/56
Inventor 王炜
Owner SHANGHAI EMPEROR OF CLEANING HI TECH
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