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A kind of guar gum-chitosan natural flocculant and preparation method thereof

A flocculant and guar gum technology, applied in the field of natural polymers, can solve the problem of less natural flocculants, etc., and achieve the effect of simple preparation method, good safety, and reduced COD efficiency

Active Publication Date: 2017-12-12
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are few researches on this natural flocculant in foreign countries, and domestic patents related to guar gum-chitosan natural flocculant have not been reported yet.

Method used

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  • A kind of guar gum-chitosan natural flocculant and preparation method thereof
  • A kind of guar gum-chitosan natural flocculant and preparation method thereof
  • A kind of guar gum-chitosan natural flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of preparation method of guar gum-chitosan natural thing flocculant, concrete steps are as follows:

[0041] (1) Preparation of guar gum emulsion

[0042] At room temperature, dissolve 2 parts of guar gum powder and 1 part of surfactant in 800 parts of water, stir and let stand for 4 hours;

[0043] (2) Chitosan emulsion preparation

[0044] Dissolve 1 part of chitosan powder in 80 parts of acetic acid solution, stir and let stand;

[0045] (3) Preparation of polyelectrolyte gel

[0046] Slowly add the solution obtained in step (2) to the solution in step (1), stir while adding, mix slowly, react at 15-40°C for 4 hours, and slowly add dropwise into the solidification liquid;

[0047] (4) Separation of products

[0048] Slowly add 6 parts of alcohol solvent to the mixed system to precipitate the product, filter it with suction, wash it and dry it.

Embodiment 2

[0050] A kind of preparation method of guar gum-chitosan natural thing flocculant, concrete steps are as follows:

[0051] (1) Preparation of guar gum emulsion

[0052] At room temperature, dissolve 5 parts of guar gum powder and 1 part of surfactant in 1000 parts of water, stir and let stand for 6 hours;

[0053] (2) Chitosan emulsion preparation

[0054]Dissolve 3 parts of chitosan powder in 100 parts of acetic acid solution, stir and let stand;

[0055] (3) Preparation of polyelectrolyte gel

[0056] Slowly add the solution obtained in step (2) to the solution in step (1), stir while adding, mix slowly, continue to react for 6 hours after mixing, and slowly add dropwise to the solidified liquid;

[0057] (4) Separation of products

[0058] Slowly add 8 parts of alcohol solvent to the mixed system to precipitate the product, filter it with suction, wash it and dry it.

Embodiment 3

[0060] A kind of preparation method of guar gum-chitosan natural flocculant, concrete steps are as follows:

[0061] (1) Preparation of guar gum emulsion

[0062] At room temperature, dissolve 10 parts of guar gum powder and 2 parts of surfactant in 1000 parts of water, stir and let stand for 8 hours;

[0063] (2) Chitosan emulsion preparation

[0064] Dissolve 5 parts of chitosan powder in 100 parts of acetic acid solution, leave standstill after stirring;

[0065] (3) Preparation of polyelectrolyte gel

[0066] Slowly add the solution obtained in step (2) to the solution in step (1), stir while adding, mix slowly, and after reacting for 8 hours, slowly add it dropwise into the solidified liquid;

[0067] (4) Separation of products

[0068] Slowly add 10 parts of alcoholic solvent to the mixed system to precipitate the product, filter it with suction, wash it and dry it.

[0069] The carboxymethyl hydroxyethyl guar gum that embodiment 1-3 prepares is analyzed with Fourie...

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Abstract

The invention discloses a guar gum-chitosan natural flocculant and a preparing method thereof and belongs to the technical field of natural polymer. The natural polymer flocculant is prepared through direct mixing with guar gum and chitosan as raw materials based on the principle of electrostatic adsorption. The guar gum-chitosan natural flocculant prepared with the method has the advantages of being efficient, environmentally friendly, economical, composite and the like, and the printing and dyeing wastewater decolourization ratio can reach 95%.

Description

technical field [0001] The invention relates to a guar gum-chitosan natural flocculant and a preparation method thereof, belonging to the technical field of natural polymers. Background technique [0002] The light and textile industry is an important pillar industry of my country's national economy. However, with the increasing impact of the global green environment concept, a large amount of liquid waste brought by light industry has affected the future development of the industry. At present, about 1 billion tons of printing and dyeing wastewater are discharged into the environment every year in my country, occupying the fifth place in the statistical discharge of industrial wastewater in the country, and the discharge of industrial papermaking wastewater accounts for 1 / 6 of the total discharge. Textile (printing and dyeing) and papermaking are two important branches of the light textile industry. The large amount of waste water they bring has gradually become the top pri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56
CPCC02F1/5263C02F1/56
Inventor 龙柱赵昱
Owner JIANGNAN UNIV
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