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Poly-bisacrylamido cationic compound and preparation method thereof

A technology of acrylamide-based cationic and ionic compounds, which is applied in the fields of polymerized bis-acrylamide-based cationic compounds and their preparation, and wastewater treatment chemicals, can solve the problem of blocking soil pores, deterioration of water bodies, harm to the reproduction of benthic organisms in water bodies and fishery production, etc. question

Active Publication Date: 2016-08-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Discharge of sewage into rivers will cause deterioration of the water body, endangering the reproduction of benthic organisms in the water body and fishery production; discharge into farmland will block soil pores and affect the growth of crops

Method used

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  • Poly-bisacrylamido cationic compound and preparation method thereof
  • Poly-bisacrylamido cationic compound and preparation method thereof
  • Poly-bisacrylamido cationic compound and preparation method thereof

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preparation example Construction

[0028] see figure 1 , the polymeric bisacrylamide cationic compound of the present invention and preparation method thereof comprise amidolysis reaction of acid chloride, ring-opening reaction of cyclic ether and polymerization reaction, and concrete steps are as follows:

[0029] 1) In a 500mL three-neck flask equipped with an electric stirrer, a condensing reflux tube and a constant pressure funnel, add diethylenetriamine and solvent acetone, and add an acid-binding agent, and slowly drop while stirring at -15°C to 15°C Add acetone solution of acryloyl chloride, dropwise for 10-30 minutes, react at 0°C-30°C for 0.5h-2h after the dropwise addition, then distill off the solvent, extract with ether, wash with water and dry to obtain the intermediate product bisacrylamide Diethylamine; Wherein, the substance ratio of diethylenetriamine and acryloyl chloride is 1.5: (2 ~ 4), the substance ratio of diethylenetriamine and acid-binding agent is 1: (0.5 ~ 1.5), The mass fraction of ...

Embodiment 1

[0033] The preparation method of polyacrylamide-based cationic compound comprises the following steps:

[0034]1) In a 500mL three-neck flask equipped with an electric stirrer, a condensing reflux tube and a constant pressure funnel, add a solution of diethylenetriamine in acetone (60% by mass fraction), and add sodium bicarbonate. Slowly add the acetone solution of acryloyl chloride (30% by mass) dropwise while stirring, the dropwise addition time is 15min, after the dropwise addition is completed, react at 0°C for 1h, then distill off the solvent, extract with ether, wash with water and dry to obtain the intermediate The product bisacrylamide diethylamine; wherein, the molar ratio of diethylenetriamine to acryloyl chloride is 1.5:2, and the molar ratio of diethylenetriamine to acid-binding agent is 1:1.5;

[0035] 2) Add N-(3-chloro-2-hydroxypropyl)-N,N,N-trimethylammonium chloride aqueous solution (mass fraction is 40%) in the reactor equipped with condensation reflux devic...

Embodiment 2

[0037] The preparation method of polyacrylamide-based cationic compound comprises the following steps:

[0038] 1) In a 500mL three-necked flask equipped with an electric stirrer, a condensing reflux tube and a constant pressure funnel, add a solution of diethylenetriamine in acetone (65% by mass fraction), and add sodium hydroxide. Slowly add an acetone solution of acryloyl chloride (55% mass fraction) dropwise while stirring, and the dropwise addition time is 10 minutes. After the dropwise addition is completed, react at 10°C for 0.5h, then distill off the solvent, extract with ether, wash with water and dry to obtain intermediate The body product is bisacrylamide diethylamine; wherein, the molar ratio of diethylenetriamine to acryloyl chloride is 1:1.5, and the molar ratio of diethylenetriamine to acid-binding agent is 1:1.2.

[0039] 2) Add N-(3-chloro-2-hydroxypropyl)-N,N,N-trimethylammonium chloride aqueous solution (mass fraction is 50%) in the reactor equipped with con...

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Abstract

The invention relates to a poly-bisacrylamido cationic compound and a preparation method thereof. The preparation method comprises the following steps: carrying out amidation reaction, chloromethylation reaction, ring-opening reaction and quaterization reaction, preparing two different cationic compounds, and carrying out water solution polymerization to obtain the cationic organic high-molecular polymer. The molecules contain cations, and also contain amido groups, ester groups, carbon-oxygen bonds, large pi bonds and water-soluble hydroxy groups. The cation degree and water solubility of the polymer are greatly enhanced as compared with common cationic compounds. Since the organic matter content in sewage (waste water) is greatly enhanced along with the development of the modern industry and the enhancement of the living standard, the organic matter particle surface is usually negatively charged, and the cationic high-molecular flocculant can perform the electric neutralization and adsorptive bridging functions on particles in water, so that the particles in water are destabilized and flocculated, thereby being beneficial to settling and filter dehydration.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and relates to a waste water treatment chemical, in particular to a polymerized bisacrylamide cationic compound and a preparation method thereof. Background technique [0002] In the case of highly concentrated modern industries, the scarcity of water resources has become a major problem facing our country. Especially in recent years, with the rapid development of the domestic economy, the water consumption has risen sharply, the discharge of industrial wastewater and urban domestic sewage has become more and more serious, and the pollution of the water environment has become increasingly serious, which has exceeded the self-purification capacity of the water body, making the water environment worse and worse. It not only endangers the quality of industrial products but also seriously affects human health. Discharge of sewage into rivers will cause deterioration of the water body, endangering the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F122/38C08F8/44C02F1/56
CPCC02F1/56C08F8/44C08F122/385
Inventor 郭睿甄建斌王超李晓芳程敏刘爱玉杨江月李欢乐
Owner SHAANXI UNIV OF SCI & TECH
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