Preparation method of water-in-water type cationic polyacrylamide emulsion

A polyacrylamide, cationic monomer technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of inconvenience, molecular weight reduction, secondary environmental pollution, etc., and achieves wide application range, good stability, and safe operation. Effect

Inactive Publication Date: 2014-02-26
SHANGHAI WSHINE CHEM
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Problems solved by technology

Although the powder product has greatly expanded the scope of use, it also has some defects: first, it needs to consume a lot of steam and electric energy in the process of drying, crushing and granulation; It reduces the molecular weight and broadens the molecular weight distribution, thereby weakening its final application performance; third, the powdered product is easily inhaled into the respiratory tract, threatening the health of production and user personnel; fourth, the dissolution rate is slow (usually takes more than 40min), and It is easy to produce "fish eyes" during the dissolution process. In order to overcome this defect, oil field sites or water tre

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preparation example Construction

[0032] A preparation method of polyacrylamide emulsion is prepared from the following components: inorganic salt, deionized water, dispersant, cationic monomer, acrylamide monomer, masking agent and initiator.

[0033] The mass of the monomer system accounts for 20-40% of the mass of the entire dispersion system. Wherein, the nonionic monomer suitable for the present invention is acrylamide or its derivatives, preferably acrylamide; the cationic monomer suitable for the present invention is a quaternary ammonium salt organic compound with a double bond, such as dimethyl diene Propyl ammonium chloride, etc.

[0034] The content of inorganic salt accounts for 27-29% of the whole dispersion system.

[0035] EDTA (disodium ethylenediaminetetraacetic acid) is a masking agent, and the dosage is 0.002-0.005% of the mass of the non-ionic monomer.

[0036] The dosage of the initiator is 0.001-0.005% of the mass of the non-ionic monomer.

[0037] Its preparation process is as follows...

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specific example 2

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Abstract

The invention relates to a preparation method of a polyacrylamide emulsion. The method is characterized by comprising the following steps: taking dimethyl diallyl ammonia chloride (DMDAAC) as the cationic monomer, taking ammonium sulfate and PDMDAAC respectively as the dispersion medium and the dispersion agent for CPAM dispersion polymerization in a saline water medium, and making acrylamide to carry out free radical copolymerization reactions with quaternary ammonium salt organic compounds so as to generate the water-in-water type cationic polyacrylamide emulsion. The appearance of the emulsion is in a milk white color, and the particle size is smaller than 1 [mu]m, which is in the range of emulsion particle size value. The preparation method adopts a novel polymer synthesis method, and overcomes the shortages existing in the prior art that a large amount of organic solvent and surfactant used in the synthesis process generates secondary pollutions to the environment and the product cost is greatly increased. The emulsion can be widely applied to the fields of oil field, industrial or city sewage processing, sludge dehydration, paper making, and personal nursing and cosmetic.

Description

technical field [0001] The invention relates to the technical field of preparation methods of water-soluble polymeric organic compound cationic polyacrylamide, in particular to a preparation method of 'water-in-water' cationic polyacrylamide. Background technique [0002] Polyacrylamide (PAM) is currently the most widely used water-soluble polymer, among which cationic polyacrylamide (CPAM) is widely used in papermaking, metallurgy, mining, printing and dyeing, textile, It is widely used in daily chemical industry, industrial water treatment, clay anti-swelling, acid thickening, water plugging and profile control in the process of oil and gas drilling and production. [0003] Most of the early CPAM products were colloidal, that is, acrylamide (AM) monomers and cationic monomers were copolymerized in aqueous solution or PAM was modified by Mannich reaction to obtain gel-like products. Due to the low polymer content (mass fraction generally not exceeding 8%), this type of pro...

Claims

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Application Information

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IPC IPC(8): C08F226/02C08F220/56C08F2/10C02F1/56
Inventor 谭辉铁
Owner SHANGHAI WSHINE CHEM
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