High-performance cation type high-molecular flocculant and preparation method thereof

A polymer flocculant, cationic technology, applied in the field of cationic polymer flocculants and preparation, can solve the problems of long storage period, low emulsion stability, affecting flocculation effect, etc., to reduce secondary pollution, The effect of reducing dosage and excellent flocculation efficiency

Inactive Publication Date: 2005-06-15
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. Emulsion products obtained by traditional emulsion methods: mainly because there are many polymer chains in a single micelle, which are entangled with each other and affect the flocculation effect, which has been mentioned in many documents (US5,670,615 US5,152,903 US6,025,432 ); and due to the low stability of the emulsion itself, the storage period generally cannot be longer
Undoubtedly, the cost is increased, and the main reason is that such a large amount of emulsifier is difficult to remove after the reaction, which undoubtedly brings secondary pollution during use;

Method used

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  • High-performance cation type high-molecular flocculant and preparation method thereof
  • High-performance cation type high-molecular flocculant and preparation method thereof
  • High-performance cation type high-molecular flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Add 15 parts of dimethylaminoethyl methacrylate, 20 parts of 1-bromohexane, 10 parts of propionitrile to a 50ml round-bottomed flask, control the temperature at 45°C, react for 12 hours, wash with ether, wash with acetone and Co-solvent recrystallization of water to obtain compound (methacryloyloxyethyl dimethyl hexaalkylammonium bromide) B 1 .

[0045] (2) In a 50ml round bottom flask, add 10 parts of distilled water and 10 parts of B 1 , completely dissolved, pass N 2 Add 0.0290 parts of trithiocarbonate in 15 minutes, raise the temperature to 60°C to initiate the reaction, and react for 20 hours. Precipitate with acetone to get macromolecular emulsifier A 1 The crude product is recrystallized with a mixed solvent of acetone and water to obtain macromolecular emulsifier A 1 , vacuum dried.

[0046] (3) Add 15 parts of dimethylaminoethyl methacrylate, 8.5 parts of 1,4-dibromobutane, and 10 parts of propionitrile to a 50ml round-bottom flask, control the temper...

Embodiment 2

[0049] In a 250ml four-necked bottle, add 70 parts of white oil, 5 parts of n-pentanol, 5 parts of Span80, and then add the water phase (containing 4 parts of distilled water, 3.6 parts of acrylamide, 0.5 parts of macromolecular emulsifier A 1 , 0.0144 parts of tetrasodium ethylenediaminetetraacetic acid, 0.8 parts of ammonium bromide); through N 2 Exhaust oxygen for 0.5 hours, add 0.003 parts of azobisisobutyronitrile, heat to 70°C to initiate the reaction, and then add 70 parts of monomers, (50% aqueous solution, acrylamide: methacryloyloxyethyl dimethyl ethyl Ammonium bromide = 10:1, pass N before use 2 0.5 hour), continue to react for 10 hours after the addition of the monomer. The uniform and stable microemulsion product obtained by the reaction.

Embodiment 3

[0051] Into a 250ml four-necked bottle, add 70 parts of white oil (a mixture of straight chain hydrocarbons and cyclic hydrocarbons), 5 parts of n-pentanol, 4 parts of distilled water, 3.6 parts of acrylamide, 0.0144 parts of ethylenediaminetetraacetic acid tetra Sodium salt, 0.8 parts of ammonium bromide, 0.36 parts of macromolecular emulsifier A 2 ; pass N 2 Add 0.0003 parts of azobisisobutyronitrile in 0.5 hours, heat to 70°C to initiate the reaction, keep the temperature at 60°C for reaction, add 70 parts of monomer (50% aqueous solution, acrylamide: methacryloyloxyethyl dimethyl ethyl Ammonium bromide = 10:1, through N 2 0.5 hours), continue to react for 10 hours after the addition of the monomer. The obtained uniform and stable microemulsion product.

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Abstract

A cationic polymer flocculant and its preparation method, the flocculant has a structural formula represented by formula I: ∴ where R 1 for C 4 -C 16 Alkyl or quaternary ammonium groups, R 2 for C 1 -C 4 Alkyl, X 1 for Br, X 2 is Cl, m 1 、m 4 for 2-10 5 , m 3 for 2-10 7 . The preparation method is divided into two steps: the first step is to synthesize a macromolecular emulsifier with a cationic monomer with a long-chain alkyl group on N; A compound of Tween series non-ionic emulsifiers with short-chain alkyl R on N 2 The cationic monomer, water, oil, alcohol and azobisisobutyronitrile can be polymerized in reverse phase microemulsion system to obtain uniform and stable microemulsion product or dry to obtain solid powder.

Description

technical field [0001] The invention relates to a cationic polymer flocculant for suspended solid dehydration and sewage treatment and a preparation method. Background technique [0002] As an important link in water treatment, flocculation has attracted more and more attention. Flocculants have developed from inorganic flocculants to polymer flocculants. Polymer flocculants have the advantages of less dosage, high efficiency, and low toxicity; polymer flocculants have also experienced development from non-ionic to anionic, cationic, and amphoteric. Type, while the cationic polymer flocculant also has the advantages of sterilization, higher flocculation efficiency, fast dehydration and good effect on many suspended solids, and has become one of the focuses of flocculant development at home and abroad in recent years. [0003] The existing cationic polymer flocculants have the following characteristics: [0004] 1. Solution products and solid products obtained by solution p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D21/01C02F1/56C08F20/56C08G61/12
Inventor 王栋张国杰袁建军张金枝程时远
Owner HUBEI UNIV
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