Chitosan graft ternary polymerization polymeric flocculant and its preparation method and use

A technology of ternary copolymerization polymer and chitosan, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of improving performance

Inactive Publication Date: 2005-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no chitosan grafted ternary copolymerization polymer flocculant has been found in the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 35Kg of deionized water into the enamel reactor with agitator and heating jacket, add 1Kg of acetic acid, add 2Kg of chitosan, dissolve completely, add 9.5Kg of acrylamide, 4Kg of dimethyl diallyl Ammonium chloride, 2Kg of nonylphenol polyoxyethylene ether, quickly dispersed for 3 minutes, and a total of 0.2Kg of cerium ammonium nitrate initiator was added to carry out chain initiation polymerization. Control the polymerization reaction temperature to 30.1°C. The polymerization reaction time was 6 hours, and a viscous translucent colloid was obtained. Add 0.2 kg of sodium hydroxide to adjust the pH value to about 5.5 to obtain a chitosan grafted ternary copolymerized polymer flocculant.

Embodiment 2

[0019] Put 29.5Kg of deionized water into the enamel reactor with agitator and heating jacket, add 0.6Kg of acetic acid, add 2Kg of chitosan, dissolve completely, add 12Kg of acrylamide, 5.5Kg of acrylamide propyl tri Methylammonium chloride, 1.5Kg of alkylphenol polyoxyethylene ether, dispersed rapidly for 3 minutes, added a total amount of 0.2Kg of benzoyl peroxide initiator, and carried out chain initiation polymerization. Control the polymerization reaction temperature to 65°C. The polymerization reaction time was 4 hours, and a viscous translucent colloid was obtained. Add 0.15 kg of ammonia water to adjust the pH value to about 5.5 to obtain the chitosan grafted ternary copolymerization polymer flocculant.

Embodiment 3

[0021] Put 63Kg of deionized water into the enamel reactor with agitator and heating jacket, add 1.5Kg propionic acid, add 3Kg chitosan, dissolve completely, add 18Kg of acrylamide, 9Kg of trimethylamine ethyl methacrylate Ester ammonium chloride, 5Kg of alkylphenol polyoxyethylene ether, quickly dispersed for 5 minutes, and a total of 0.5Kg of potassium persulfate-urea initiator was added to carry out chain-initiated polymerization. Control the polymerization reaction temperature to 50.5°C. The polymerization reaction time was 6 hours, and a viscous translucent colloid was obtained. Add 0.3 kg of potassium hydroxide to adjust the pH value to about 5.5 to obtain the chitosan grafted ternary copolymerization polymer flocculant.

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Abstract

The present invention discloses one kind of chitosan-grafting ternary copolymer flocculant and its preparation process and application. Chitosan is first dissolved in acid solution and made to produce grafting polymerization with non-ionic monomer, cationic monomer and non-ionic surfactant under the action of initiator at 30-75 deg.c for 2-6 hr; and the reaction product is then added with alkali to regulate the pH value to 3.5-5.5, so as to obtain the chitosan-grafting ternary copolymer flocculant. The produced flocculant is used in sewage treatment, and has treating effect higher than available marketable flocculants, small use amount, wide application pH range, large flocculated product, fast deposition and other advantages.

Description

technical field [0001] The invention relates to a chitosan grafted ternary copolymerization polymer flocculant, a preparation method and application thereof. Background technique [0002] Polymer water treatment flocculants commonly used in China include polyaluminum chloride, polyferric chloride, polyacrylamide, and cationic polyacrylamide. Among them, inorganic polymer flocculants are mainly produced in Henan, Guangxi and other places, and organic polymer flocculants are mainly produced in Henan, Guangxi and other places. Agents include French SNF company and domestic companies such as Daqing and Shengli. At present, no chitosan grafted ternary copolymerization polymer flocculant has been found in the market. From the research and comparison of water solubility, flocculation characteristics and the applicable range of pH, the results show that the performance of chitosan grafted acrylamide cationic monomer ternary polymer flocculant is superior to that of inorganic polyal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08F251/00
Inventor 胡勇有程建华李泗清
Owner SOUTH CHINA UNIV OF TECH
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