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Synthesis method of cationic polyacrylamide p(am-dac)

A technology of polyacrylamide and synthesis method, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor flocculation effect of flocculants, etc., and achieve the effects of improved flocculation effect, large relative molecular weight, and simple process

Active Publication Date: 2015-10-14
格润化学(东营)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies in the prior art, the present invention provides a synthetic method of cationic polyacrylamide P (AM-DAC), to improve the product quality of cationic polyacrylamide, and to solve the poor flocculation effect of existing cationic polyacrylamide flocculants The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of synthetic method of cationic polyacrylamide P (AM-DAC), comprises the following steps:

[0015] (1) Weigh acrylamide powder and acryloyloxyethyltrimethylammonium chloride solution (80%), mix them, add deionized water and stir evenly to obtain an aqueous solution of polymerized monomers with a mass concentration of 24%, and the polymerized monomers The mol ratio of acrylamide and acryloyloxyethyltrimethylammonium chloride in the body is 2:3;

[0016] (2) Cool down to 15°C, add ammonia water to adjust the pH to 8.2, then add tetrasodium edetate, sodium benzoate, boric acid, isopropanol, urea and Span 20 and mix well, of which edetate The consumption of tetrasodium, sodium benzoate, boric acid, isopropanol, urea and Span 20 is respectively 0.015%, 0.008%, 0.008%, 0.020%, 0.012% and 0.006% of the polymerized monomer aqueous solution weight;

[0017] (3) Cool down to 8°C, pass nitrogen to remove oxygen for 20 minutes, add a redox composite initiator to polymerize ...

Embodiment 2

[0020] A kind of synthetic method of cationic polyacrylamide P (AM-DAC), comprises the following steps:

[0021] (1) Weigh acrylamide powder and acryloyloxyethyltrimethylammonium chloride solution and mix, add deionized water and stir evenly to obtain a polymerized monomer aqueous solution with a mass concentration of 26%, and the acrylamide in the polymerized monomer The molar ratio with acryloyloxyethyltrimethylammonium chloride is 3:2;

[0022] (2) Cool down to 18°C, add ammonia water to adjust the pH to 8.5, then add tetrasodium ethylenediaminetetraacetic acid, sodium benzoate, boric acid, isopropanol, urea and Span 20 and mix well, of which ethylenediaminetetraacetic acid The consumptions of tetrasodium, sodium benzoate, boric acid, isopropanol, urea and Span 20 are respectively 0.016%, 0.009%, 0.009%, 0.022%, 0.013% and 0.0065% of the weight of the polymerized monomer aqueous solution.

[0023] (3) Cool down to 10°C, pass nitrogen to remove oxygen for 25 minutes, add a ...

Embodiment 3

[0026] A kind of synthetic method of cationic polyacrylamide P (AM-DAC), comprises the following steps:

[0027] (1) Weigh acrylamide powder and acryloyloxyethyltrimethylammonium chloride solution and mix, add deionized water and stir evenly to obtain a polymerized monomer aqueous solution with a mass concentration of 25%, and the acrylamide in the polymerized monomer The molar ratio with acryloyloxyethyltrimethylammonium chloride is 1:1.2;

[0028] (2) Cool down to 16°C, add ammonia water to adjust the pH to 8.3, then add tetrasodium edetate, sodium benzoate, boric acid, isopropanol, urea and Span 20 and mix well, of which edetate The dosages of tetrasodium, sodium benzoate, boric acid, isopropanol, urea and Span 20 are respectively 0.015-0.018%, 0.008-0.010%, 0.008-0.010%, 0.020-0.024%, 0.012-0.014% of the weight of the polymerized monomer aqueous solution % and 0.006-0.007%;

[0029] (3) Cool down to 9°C, pass nitrogen to remove oxygen for 25 minutes, add a redox composit...

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Abstract

The invention provides a method for synthesizing cation polyacrylamide P(AM-DAC), comprising the following steps of: (1) weighting and mixing an acrylamide powder and an acryloyloxyethyl trimethyl ammonium chloride solution, adding deionized water, uniformly stirring, to obtain a polymerization monomer aqueous solution with 24-26% of mass concentration; (2) reducing temperature to 15-18 DEG C, adding ammoniacal liquor to regulate PH to be 8.2-8.5, then adding tetrasodium ethylenediamine tetraacetate, sodium benzoate, boric acid, isopropanol, urea and span 20, and uniformly mixing; (3) reducing temperature until 8-10 DEG C, adding a redox composite initiator for polymerization for 3-4h after introducing nitrogen and deoxygenating; and (4) after polymerization, taking out micelle for granulation, drying, crushing and sieving, to obtain the cation polyacrylamide powder. The cation polyacrylamide provided by the invention has big relative molecular weight (more than 16millions) and has good water solubility. Proved in a city sewage treatment plant, flocculation effect is greatly raised.

Description

technical field [0001] The invention relates to the field of organic polymers, in particular to a method for synthesizing cationic polyacrylamide P (AM-DAC). Background technique [0002] Polyacrylamide (PAM) is a general term for acrylamide (Acrylamide, AM) homopolymers or linear polymers obtained by copolymerization with other monomers, including anionic (APAM) and cationic (CPAM), liquid, gel, Physical form such as powder. Polyacrylamide is a linear water-soluble polymer. It is one of the most widely used varieties of water-soluble polymers. It has a wide range of applications in industries such as building materials and agriculture, and is known as "all-industry additives" and "universal products". Polyacrylamide is a fine chemical product and also belongs to the category of new materials. Among them, ultra-high molecular weight polyacrylamide is one of the eight major fine chemical products prioritized by the country, and it is also one of the key projects of the for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/34C08F4/40C08F2/48C02F1/56
Inventor 李海涛李恒滨毛凤
Owner 格润化学(东营)有限公司