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A kind of graft copolymerization type cationic polysaccharide biological flocculant and preparation method thereof

A technology of biological flocculant and cationic polysaccharide, applied in the field of graft copolymerization type cationic polysaccharide biological flocculant and its preparation, can solve the problems of inseparability and difficult to compare with adsorption bridging, and achieve high positive charge density and good social The effect of economic benefits and broad market prospects

Active Publication Date: 2017-05-03
威海汉邦生物环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the above examples, it can be seen that the currently researched graft copolymerization cationic modified polymer materials are inseparable from amide groups. Although they have the ability to neutralize negative charges, their properties such as adsorption and bridging are still difficult to compare with those on the market. Comparable to the commonly used polyacrylamide

Method used

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  • A kind of graft copolymerization type cationic polysaccharide biological flocculant and preparation method thereof
  • A kind of graft copolymerization type cationic polysaccharide biological flocculant and preparation method thereof
  • A kind of graft copolymerization type cationic polysaccharide biological flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Nonionic polysaccharide bioflocculant grafted with methacryloyloxyethyltrimethylammonium chloride and acryloyloxyethyltrimethylammonium chloride.

[0033] In the 500ml there-necked flask, add 200g mass concentration to be the non-ionic polysaccharide biological flocculant (Dx) solution of 15%, start to stir, add the methacryloyloxyethyl trimethyl ammonium chloride ( DMC) solution 50g and mass concentration are 80% acryloyloxyethyltrimethylammonium chloride (DAC) solution 25g, after logical nitrogen deoxygenation, be warming up to 30 ℃, add ammonium persulfate 0.36g, bisulfite Sodium 0.09g, after reacting for 1h, heat up to 60°C and add 0.09g of dibenzoyl peroxide (BPO), continue stirring for 3h, stop nitrogen flow, feed air to terminate the reaction, take it out, the product is precipitated with ethanol, after ethanol and After extraction with water and washing, dry in a vacuum oven at 50°C until constant weight and grind.

[0034] The results show that the monomer con...

Embodiment 2

[0036] Nonionic polysaccharide bioflocculant grafted with dimethylaminoethyl methacrylate and dimethylaminoethyl acrylate.

[0037] Adding 200g mass concentration in a 500ml three-necked flask is a 15% non-ionic polysaccharide bioflocculant (Dx) solution, start stirring, add dimethylaminoethyl methacrylate (DMAEMA) 30g and dimethylaminoethyl acrylate ( DMAEA) 30g, after blowing nitrogen to remove oxygen, heat up to 50°C, then add cerium ammonium nitrate 0.45g, after reacting for 8 hours, stop nitrogen blowing, blow in air to terminate the reaction, take it out, precipitate the product with ethanol, and extract it with ethanol and water , After washing, dry in a vacuum oven at 50°C until constant weight, and grind.

[0038] The results showed that the monomer conversion rate was 69.5%, the cationic degree was 34.6%, and the flocculation effect was good.

Embodiment 3

[0040] Nonionic polysaccharide bioflocculant grafted with methacryloyloxyethyltrimethylammonium chloride.

[0041]In the 500ml there-necked flask, add 200g mass concentration and be 15% non-ionic polysaccharide biological flocculant (Dx) solution, start stirring, add the aqueous solution containing 60g methacryloyloxyethyltrimethylammonium chloride (DMC), After passing nitrogen to remove oxygen, heat up to 40°C, add cerium ammonium nitrate 0.45g, react for 4 hours, stop nitrogen, pass air to terminate the reaction, take it out, the product is precipitated with ethanol, extracted with ethanol and water, and washed at 50 °C in a vacuum drying oven to constant weight and grind.

[0042] The results showed that the monomer conversion rate was 62.7%, the cationic degree was 43.53%, and the flocculation effect was obvious.

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Abstract

The invention relates to a grafted copolymerized cationic polysaccharide bioflocculant and a preparing method thereof. A product with the cationic degree (DC) of 3-63% is finally prepared through an aqueous solution polymerization technology with a present nonionic polysaccharide bioflocculant (Dx) as a raw material, one or more of dimethyl diallyl ammonium chloride (DMDAAC), methacryloxyethyltrimethyl ammonium chloride (DMC), acryloyloxyethyltrimethyl ammonium chloride (DAC), dimethylaminoethyl methacrylate (DMAEMA), dimethylaminoethyl acrylate (DMAEA) as a monomer, and one or two of ammonium persulfate / sodium bisulfate and dibenzoyl peroxide (BPO) (AIBA) as an initiator. The preparation method is simple, and is easy to control, and the product obtained in the invention has good flocculation effect and high treatment efficiency, and can be widely used in the field of treatment various sewages, the sludge dewatering field and the like.

Description

technical field [0001] The invention belongs to the technical field of polysaccharide biological flocculant modification technology, in particular to a graft copolymerization type cationic polysaccharide biological flocculant and a preparation method thereof. Background technique [0002] Graft copolymerization cationic bioflocculant is the product of graft copolymerization of bioflocculant materials and cationic monomers, which can act as charge neutralization and adsorption bridging with water particles in water treatment to reduce electrostatic repulsion between particles , which is conducive to flocculation. In recent years, there have been many studies on the preparation of water-soluble graft-copolymerization cationic bioflocculant materials that have great application prospects in papermaking, oil exploration, and sewage treatment, such as cationic starch and cationic modified chitosan. Concentrate on the selection of cationic monomer, initiator and preparation proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F2/10C02F1/56
Inventor 庄茅胡阳
Owner 威海汉邦生物环保科技股份有限公司
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