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Preparation method and applications of polyvinylamine polymeric flocculant containing dihydroxyphenylalanine functional groups

A polyvinylamine polymer, dopa-functional technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of weak binding force of colloidal particles, inability to form stable flocculent precipitation, restricted use, etc., and achieve excellent winding and flocculation effect, low production cost, and the effect of enhancing adhesion

Active Publication Date: 2014-06-18
嘉兴浩然科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although polyvinylamine has a certain flocculation effect, its binding force with colloidal particles in sewage / wastewater is weak, and it cannot form stable flocculent precipitates in many cases, which limits its use to a large extent

Method used

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  • Preparation method and applications of polyvinylamine polymeric flocculant containing dihydroxyphenylalanine functional groups
  • Preparation method and applications of polyvinylamine polymeric flocculant containing dihydroxyphenylalanine functional groups

Examples

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Effect test

Embodiment 1

[0023] A preparation method of a polyvinylamine polymer flocculant containing a dopa functional group, the steps are as follows in parts by weight:

[0024] (1) Mixing: Mix 10g of polyvinylamine and 1000mL of water and stir to fully dissolve; then add 10g of 3,4-dihydroxyphenylpropionic acid, stir to fully dissolve;

[0025] (2) Coupling reaction: After 50 minutes, heat up to 40°C, add 0.1M dilute hydrochloric acid to adjust the pH value of the solution to 6.0, and slowly add 1-(3-dimethylaminopropyl)-3-ethyl under nitrogen protection 10 g of carbodiimide hydrochloride, stirred for 3 hours, cooled and discharged; the purpose is to control the initiation of the reaction and reduce the generation of side reactants.

[0026] (3) Separation: Collect the reaction liquid and collect it in the regenerated cellulose dialysis membrane for separation. The separation time is 3 days, and then the solution is dried to constant weight, and finally polyvinylamine polymer flocculation contain...

Embodiment 2

[0029] A preparation method of a polyvinylamine polymer flocculant containing a dopa functional group, the steps are as follows in parts by weight:

[0030] (1) Mixing: Take 20g of polyvinylamine, 2000mL of water and 200mL of ethanol, mix and fully stir to fully dissolve; then add 10g of 3,4-dihydroxyphenylpropionic acid, stir to fully dissolve;

[0031] (2) Coupling reaction: After 90 minutes, heat up to 65°C, add sodium hydroxide to adjust the pH value of the solution to 10.0, and slowly add 1-(3-dimethylaminopropyl)-3-ethyl carbon under the protection of nitrogen 35 g of diimine hydrochloride, stirred for 3 hours, cooled and discharged; the purpose is to control the initiation of the reaction and reduce the generation of side reactants.

[0032] (3) Separation: Collect the reaction solution and collect it in the regenerated cellulose dialysis membrane for separation. The separation time is 2 days, and then the solution is dried to constant weight, and finally polyvinylamine...

Embodiment 3

[0034] A preparation method of a polyvinylamine polymer flocculant containing a dopa functional group, the steps are as follows in parts by weight:

[0035] (1) Mixing: Take 10g of polyvinylamine, 800mL of water and 25mL of methanol, mix and fully stir to fully dissolve; then add 4g of 3,4-dihydroxyphenylpropionic acid, stir to fully dissolve;

[0036] (2) Coupling reaction: After 60 minutes, heat up to 35°C, add 0.1M oxalic acid to adjust the pH value of the solution to 5.0, and slowly add 5g of diisopropylcarbodiimide under the protection of nitrogen, stir for 2 hours, then cool down and discharge ; The purpose is to control the initiation of the reaction and reduce the generation of side reactants.

[0037] (3) Separation: Collect the reaction solution and collect it into the regenerated cellulose dialysis membrane for separation. The separation time is 4 days, and then the solution is dried to constant weight, and finally polyvinylamine polymer flocculation containing dopa...

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Abstract

The invention relates to a preparation method and applications of a polyvinylamine polymeric flocculant containing dihydroxyphenylalanine functional groups, which belong to the technical field of environment-friendly water treatment. The polyvinylamine polymeric flocculant is prepared through the steps of mixing, coupling-reacting and separating. Compared with the existing traditional polymeric flocculant, the polyvinylamine polymeric flocculant as well as a flocculant and a mud cake dehydrant applied to sewage treatment are greatly enhanced in flocculation effect, thereby greatly reducing the turbidity of sewage under low concentration dosage of chemical agents.

Description

technical field [0001] The invention relates to a preparation method and application of a polyvinylamine polymer flocculant containing a dopa functional group, and belongs to the technical field of environmental protection water treatment. Background technique [0002] Flocculant is a common water treatment chemical, which occupies a pivotal position in the water treatment industry. Flocculants can be used to reduce sensory indicators such as turbidity and chromaticity of water, and remove various high-molecular organic matter, colloidal particles, heavy metals and certain radioactive substances. At present, the flocculants widely used in China are mainly inorganic and organic synthesis. [0003] The most common inorganic flocculants are mainly aluminum salts and iron salts, including polyaluminum chloride (PAC), polyaluminum sulfate (PAS), polyferric sulfate (PFS), and polyferric chloride (PFC). Generally speaking, the dosage of inorganic flocculants is large, the treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F26/02C08F8/32C02F1/56
Inventor 张丹龙柱
Owner 嘉兴浩然科技有限责任公司
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