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A kind of polyamine cationic polymer modified starch flocculant and preparation method thereof

A technology of cationic polymers and ionic polymers, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve problems such as safety performance doubts, performance degradation, large feeding amount, etc., to reduce production costs, excellent flocculation effect, and improve flocculation effect of effect

Active Publication Date: 2018-04-10
YELLOW RIVER CONSERVANCY TECHN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used flocculation technology at home and abroad and the existing problems are: the price of inorganic flocculant is low, but the feeding amount is large, which is unsafe and secondary pollution; the organic polymer flocculant is mainly polyacrylamide series products , the macromolecules of this flocculant are easily damaged by external factors, so that its performance is greatly reduced
Moreover, the most important disadvantage is that the residual monomer acrylamide in the polyacrylamide polymerization process is a neurotoxic agent, which can damage the nervous system, and its safety performance is questioned; the new microbial flocculant has high activity, safety, harmlessness and pollution-free , easy to be biodegraded, easy to use, etc., but most of them are still in the screening stage of strains, and have the disadvantage of high cost, which cannot meet the needs of industrial production

Method used

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  • A kind of polyamine cationic polymer modified starch flocculant and preparation method thereof
  • A kind of polyamine cationic polymer modified starch flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Below 30°C, slowly drop 15 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride into 10.3 parts of diethylenetriamine while stirring. Then the temperature was raised to 50° C., stirred at this temperature for 6 hours, cooled down to room temperature, and a cationized polymer was obtained.

[0033] Slowly add a mixture of 30 parts of cornstarch, 300 parts of water and 0.5 parts of 1-ethyl-2,3-dimethylimidazolium tetrafluoroborate to the above-mentioned cationized polymer while stirring at 50°C. The reaction was carried out for 8 hours, cooled to room temperature, and polyamine cationic polymer modified starch flocculant.

Embodiment 2

[0035] Below 30°C, slowly drop 19 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride into 10.3 parts of diethylenetriamine while stirring. Then, the temperature was kept at 30° C., stirred at this temperature for 6 hours, cooled down to room temperature, and a cationized polymer was obtained.

[0036] Slowly add a mixture of 30 parts of cornstarch, 300 parts of water and 0.5 parts of 1-ethyl-3-methylimidazolium tetrafluoroborate to the above cationic polymer while stirring at 70°C, and react at this temperature for 8 Hours, cooled to room temperature, polyamine cationic polymer modified starch flocculant.

Embodiment 3

[0038] Below 30°C, slowly drop 23 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride into 10.3 parts of diethylenetriamine while stirring. Then the temperature was raised to 50° C., stirred at this temperature for 6 hours, cooled down to room temperature, and a cationized polymer was obtained.

[0039] Slowly add a mixture of 30 parts of cornstarch, 300 parts of water and 0.5 parts of 1-butyl-3-methylimidazolium tetrafluoroborate to the above cationic polymer while stirring at 90°C, and react at this temperature for 8 Hours, cooled to room temperature, polyamine cationic polymer modified starch flocculant.

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Abstract

The invention belongs to the technical field of flocculants for sewage treatment, in particular to a polyamine cationic polymer modified starch flocculant and a preparation method thereof. The cationic polymer is prepared by reacting polyamine with a cationic reagent, and the starch flocculant is prepared by etherifying the cationic polymer with starch under ionic liquid catalysis. The flocculant of the present invention has excellent flocculation effect in industrial and domestic sewage, can reduce production costs, accelerate the application of green renewable resources in the water treatment industry, and thus promote the development of social environmental protection.

Description

technical field [0001] The invention belongs to the technical field of flocculants for sewage treatment, in particular to a polyamine cationic polymer modified starch flocculant and a preparation method thereof. Background technique [0002] With the advancement of technology and the enhancement of people's awareness of environmental protection, the environmental safety performance of flocculants has gradually attracted the attention and attention of the society. Flocculation precipitant is the most commonly used reagent in sewage post-treatment. It can separate the dispersed phase from the dispersion medium to separate flocculent precipitates. It has the functions of sludge settlement, filtration, and clarification in sludge treatment. [0003] At present, the commonly used flocculation technology at home and abroad and the existing problems are: the price of inorganic flocculant is low, but the feeding amount is large, which is unsafe and secondary pollution; the organic p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/00C08B31/12C02F1/56
Inventor 刘伟刘国际姚新鼎方瑞娜程亮王宗舞
Owner YELLOW RIVER CONSERVANCY TECHN INST
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