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Preparation method of micro-cross-network hydrophobic association cationic polyacrylamide flocculant

A polyacrylamide, hydrophobic association technology, applied in chemical instruments and methods, flocculation/precipitation water/sewage treatment, water pollutants, etc. Effect

Active Publication Date: 2018-01-16
HENAN ZHENGJIA ENERGY ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the first step, 10gN,N-dimethylhexadecyl-1,2-epoxyhexyl ammonium bromide and 100g absolute ethanol were added to the three-necked flask successively, 40 o Stir in a constant temperature water bath under nitrogen protection to dissolve N,N-dimethylhexadecyl-1,2-epoxyhexyl ammonium bromide, then add 2.5g diallylamine, react for 24h, concentrate and spin dry , soaked and washed three times in absolute ethanol, 60 o C is vacuum-dried to obtain white powdery surfactant monomer N-(6-(diallylamine)-5-hydroxyhexyl)-N,N-dimethylhexadecyl ammonium bromide;

[0023] In the second step, 1g of synthesized N-(6-(diallylamine)-5-hydroxyhexyl)-N,N-dimethylhexadecylammonium bromide and 100g deionized water were added to the flask successively, under nitrogen atmosphere Protection 50 o Heat to dissolve in C water bath, then add 16g of acrylamide monomer, 8g of dimethyl diallyl ammonium chloride and 0.1g of cross-linking agent N,N-methylenebisacrylamide, and stir to dissolve;

[002...

Embodiment 2

[0030] In the first step, 10gN,N-dimethylhexadecyl-1,2-epoxyhexyl ammonium bromide and 100g absolute ethanol were added to the three-necked flask successively, 40 o Stir in a constant temperature water bath under nitrogen protection to dissolve N,N-dimethylhexadecyl-1,2-epoxyhexylammonium bromide, then add 5g of 4-vinylbenzylamine hydrochloride, react for 36h, and concentrate Spin dry, soak and wash three times in absolute ethanol, 60 oC vacuum-dried to obtain light yellow solid surfactant monomer N-(6-(p-vinylbenzylamino)-5-hydroxyhexyl)-N,N-dimethylhexadecyl ammonium bromide;

[0031] In the second step, 1.2g of synthetic N-(6-(p-vinylbenzylamino)-5-hydroxyhexyl)-N,N-dimethylhexadecylammonium bromide and 100g of deionized water were added to the flask in turn, Under nitrogen protection 60 o Heat to dissolve in C water bath, then add 16g of acrylamide monomer, 9g of dimethyl diallyl ammonium chloride and 0.1g of cross-linking agent N,N-methylenebisacrylamide, and stir to di...

Embodiment 3

[0038] In the first step, 20gN,N-dimethylhexadecyl-1,2-epoxyhexyl ammonium bromide and 300g absolute ethanol were added to the three-necked flask in turn, 40 o Stir in a constant temperature water bath under nitrogen protection to dissolve N,N-dimethylhexadecyl-1,2-epoxyhexylammonium bromide, then add 6g of diallylamine, react for 24h, concentrate and spin dry, Soak and wash three times in absolute ethanol, 60 o C is vacuum-dried to obtain white powdery surfactant monomer N-(6-(diallylamine)-5-hydroxyhexyl)-N,N-dimethylhexadecyl ammonium bromide;

[0039] In the second step, 1g of synthesized N-(6-(diallylamine)-5-hydroxyhexyl)-N,N-dimethylhexadecylammonium bromide and 100g deionized water were added to the flask successively, under nitrogen atmosphere Protection 50 o Heat to dissolve in a C water bath, then add 12g of acrylamide monomer, 12g of methacryloyloxyethyltrimethylammonium chloride and 0.2g of crosslinking agent N,N-methylenebisacrylamide, and stir to dissolve;

...

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Abstract

The invention discloses a method for preparing mico-crosslinking hydrophobically associating cation polyacrylamide flocculent. Firstly, a surface-active monomer containing a hydrophobic structure is synthesized in an ethyl alcohol solution, washed and dried, then the surface-active monomer, acrylamide, cationic monomer and a cross-linking agent are mixed according to a certain proportion, stirred and dissolved, and acid or alkali is added to adjust pH of a reaction solution to be 5-7; finally, azo initiator is added, reaction is conducted for 3-10 h under nitrogen protection and in constant-temperature water bath at 40-80 DEG C, and mico-crosslinking hydrophobically associating cation polyacrylamide flocculent powder is obtained after the mixture is washed with anhydrous ethanol and dried. The hydrophobic association function between molecules of the flocculent is better, contact and adsorption functions of organic particles in sewage are benefited, the bridging, sweeping and trapping functions are better, formed floc is larger, floc sedimentation speed is higher, and the use amount of the flocculent is smaller. Salt resistance, thermal stability and anti-shear ability of the prepared flocculent are better than those of traditional flocculent.

Description

technical field [0001] The invention relates to a synthesis method of a high-performance macromolecule flocculant, in particular to a preparation method of a microcross-network hydrophobic association cationic polyacrylamide flocculant. Background technique [0002] The increasingly tense water resources issue makes it urgent to study new, efficient and economical water treatment technologies. Among water treatment technologies including biological, chemical oxidation, ion exchange, electrodialysis, etc., flocculation has attracted more attention because of its simplicity, economy and high efficiency. For flocculation, the key is the performance of flocculants, so how to develop new and efficient flocculants is the focus and focus of research. Among all synthetic organic flocculants, polyacrylamide (PAM) is the most widely studied and used one. Among them, cationic polyacrylamide (CPAM) can conduct neutralization with negatively charged colloidal particles and undergo adso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F236/20C08F222/38C08F220/34C02F1/56C02F101/30C02F103/16
CPCC02F1/56C02F2101/30C02F2103/16C08F220/56C08F236/20C08F222/385C08F220/34
Inventor 刘松荫刘正正刘方方刘彦彬王中奇
Owner HENAN ZHENGJIA ENERGY ENVIRONMENTAL PROTECTION CO LTD