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Production of flocculating agent containing fluorine cation

A cationic flocculant and crosslinking agent technology, which is applied in the field of flocculant preparation, can solve the problems of difficult separation of solid and liquid, slow settling speed, and immature process conditions, etc.

Inactive Publication Date: 2007-11-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, inorganic salt flocculants are mainly divided into aluminum salts and iron salts. The aluminum ions remaining in the water in the former will cause secondary pollution, and the iron ions themselves have color and have a corrosive effect on equipment; microbial flocculants are still in the selection of strains. In the stage of laboratory research, the cost is high, some process conditions are not mature, and there is still a certain distance from industrial production; although the dosage of ordinary polymer flocculants is small and the flocculation effect is good, the flocs formed are large and the flocs The body is loose, the sedimentation speed is slow, the solid and liquid are not easy to separate, and the moisture content of the filter cake is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1, first stir and drop a dimethylamine solution with a mass fraction of 30% into epichlorohydrin at a constant temperature of 25-35°C, and then add the crosslinking agent 1,2-ethylenediamine after the dropwise addition is completed, Continue to stir, and raise the temperature to 70°C at a heating rate of 1°C / min, react at a constant temperature for 4 hours, then add perfluoroalkylsulfonyl halide perfluorobutylsulfonyl chloride, and react for another 2 hours to obtain a fluorine-containing cationic flocculant, in which The mass ratio of oxychloropropane: dimethylamine: perfluoroalkylsulfonyl halide: crosslinking agent is 150:280:20:10.

Embodiment 2

[0009] Example 2, first stirring and dropping a dimethylamine solution with a mass fraction of 30% into epichlorohydrin at a constant temperature of 25-35°C, and then adding the crosslinking agent 1,3-propylenediamine after the dropping is completed, Continue to stir, and raise the temperature to 70°C at a heating rate of 1°C / min, react at a constant temperature for 4 hours, then add perfluoroalkylsulfonyl halide perfluorohexylsulfonyl chloride, and react for another 2 hours to obtain a fluorine-containing cationic flocculant, in which epoxy The mass ratio of chloropropane: dimethylamine: perfluoroalkylsulfonyl halide: crosslinking agent is 200:160:40:13.

Embodiment 3

[0010] Example 3, first stirring and dropping a dimethylamine solution with a mass fraction of 30% into epichlorohydrin at a constant temperature of 25-35°C, and then adding the crosslinking agent 1,4-butanediamine after the dropping is completed, Continue to stir, and raise the temperature to 70°C at a heating rate of 1°C / min, react at a constant temperature for 4 hours, then add perfluoroalkylsulfonyl halide perfluorooctylsulfonyl chloride, and react for another 2 hours to obtain a fluorine-containing cationic flocculant, in which The mass ratio of oxychloropropane: dimethylamine: perfluoroalkylsulfonyl halide: crosslinking agent is 260:100:50:16.

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PUM

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Abstract

Production of fluoride cation flocculating agent is carried out by dripping 30% dimethylamine solution into epoxy chloropropane at 25-35 degree while agitating, adding into cross-linking agent, agitating, raising temperature to 70 degree by 1 degree / min, keeping temperature while reacting for 4 hrs, adding into perfluoro alkyl sulfonic acid halide, and re-reacting for 2 hrs to obtain final product. It's tight, has low deposition speed, no solid-liquid separation and less filter cake water content.

Description

technical field [0001] The invention relates to a preparation method of a flocculant, in particular to a preparation method of a fluorine-containing cationic flocculant. Background technique [0002] With the rapid development of my country's economy, the treatment of wastewater in papermaking, dyeing and printing and dyeing industries has increasingly become an urgent problem in wastewater treatment. In the wastewater treatment of papermaking, dyestuff and printing and dyeing industries, chemical flocculation method is one of the key research directions at home and abroad, and its treatment effect mainly depends on the performance of flocculants. [0003] At present, inorganic salt flocculants are mainly divided into aluminum salts and iron salts. The aluminum ions remaining in the water in the former will cause secondary pollution, and the iron ions themselves have color and have a corrosive effect on equipment; microbial flocculants are still in the selection of strains. ...

Claims

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Application Information

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IPC IPC(8): C02F1/56C08G59/14C08K5/42C08K5/17
Inventor 张光华来智超王义伟朱军峰吴桂霞
Owner SHAANXI UNIV OF SCI & TECH
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