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Reversed phase emulsion synthesis method for polyacrylamide flocculant

A technology of polyacrylamide and inverse emulsion, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of short storage period and instability of polyacrylamide flocculant, achieve good stability, promote stability, and operate simple effect

Active Publication Date: 2008-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for synthesizing an inverse emulsion of a polyacrylamide flocculant. The method of the present invention overcomes the instability and short storage period of the polyacrylamide flocculant existing in the existing inverse emulsion polymerization technology. insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] (1) Add 10 parts of methacryloxyethyltrimethylammonium chloride, 15 parts of acrylamide, 20 parts of styrene, 5 parts of methyl methacrylate in a 500ml round bottom four-necked flask, 5 parts of acrylic acid, 70 parts of deionized water.

[0025] (2) Nitrogen blowing to remove oxygen, adding initiator (sodium bisulfite) 0.005% (accounting for the total weight of the monomer), 7 parts of tween20, raising the temperature to 35°C, controlling the temperature for 10 hours, and ending the reaction.

[0026] (3) After demulsification, wash 4 times with deionized water, refine with acetone and dry to obtain polymer emulsifier A1.

example 2

[0028] (1) Add 20 parts of methacryloxyethyltrimethylammonium chloride, 15 parts of acrylamide, 5 parts of styrene, 10 parts of methyl methacrylate in a 500ml round bottom four-necked flask, 5 parts of butyl acrylate, 70 parts of deionized water.

[0029] (2) Nitrogen blowing to remove oxygen, adding initiator (potassium persulfate) 0.005% (accounting for the total weight of the monomer), 5 parts of tween20, raising the temperature to 70°C, controlling the temperature for 8 hours, and ending the reaction.

[0030] (3) After demulsification, wash 4 times with deionized water, refine with acetone and dry to obtain polymer emulsifier A2. Preparation of polyacrylamide flocculant emulsion:

example 3

[0032] (1) Add 100 parts of white oil, 5 parts of span80, 1 part of polymer emulsifier Al, 3 parts of tween20, and 0.0001 part of azobisisobutyronitrile into a 500mL beaker, dissolve and prepare the oil phase.

[0033] (2) Take 40 parts of deionized water, add 15 parts of acrylamide, 3 parts of methacryloyloxyethyltrimethylammonium chloride, 0.001 part of EDTA disodium, 0.002 parts of urea, add 0.002 parts of over Ammonium sulfate, formulated as an aqueous phase.

[0034] (3) Put the oil phase in a high-speed emulsifier, start the emulsifier, then add the water phase, and emulsify for 30 minutes to make a monomer emulsion.

[0035](4) Put the monomer emulsion in a 500mL four-neck flask, pass nitrogen gas to deoxygenate for 30 minutes, turn off the nitrogen gas, start the stirring equipment at a speed of 100 rpm, control the temperature at 40°C, react for 7.0 hours, and add 0.00002 parts After raising the reaction temperature to 60° C. for another 3.0 hours, stop the reaction....

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PUM

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Abstract

The invention provides an inverse emulsion synthesis method of polyacrylamide flocculent, which belongs to a macromolecular compound synthesis field. The invention utilizes the inverse emulsion method to synthesize the polyacrylamide flocculent. Firstly, the polymer emulsifier is prepared; then the water phase and oil phases are prepared, the polymer emulsifier is added into the oil phase, which is mixed and emulsified with the water phase; under the function of a polymerization initiator, the polyacrylamide flocculent emulsion is finally obtained through the chemical reaction. The mehtod of the invention utilizes the specialized polymer emulsifier to prepare the polyacrylamide flocculent emulsion, which has the advantages of a high concentration and a good stability.

Description

technical field [0001] The invention relates to a preparation method of a cationic high-efficiency flocculant for suspended matter dehydration and sewage treatment. Background technique [0002] Polyacrylamide (PAM) is a general term for acrylamide and its various copolymers. It is an important fine chemical product with high technology content and high added value. In 1952, Dow Chemical Company of the United States obtained a patent for polyacrylamide, and began industrialization in 1954. At present, commercialized polyacrylamide products have five series and more than 2,000 varieties, which are widely used in various industries. Polyacrylamide series products can be divided into non-ionic type (NPAM), anionic type (APAM), and cationic type (CPAM). As a flocculant, polyacrylamide is mainly used in urban sewage treatment, mine production and mine wastewater treatment, as well as water treatment in the steel industry, chemical industry, petrochemical industry, paper industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
Inventor 黄玉洪李凌波
Owner CHINA PETROLEUM & CHEM CORP
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