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A polymer membrane for high-salt wastewater treatment and its preparation method

A technology for polymer membranes and high-salt wastewater, applied in osmosis/dialysis water/sewage treatment, chemical instruments and methods, membranes, etc., can solve the problems of mechanical properties that need to be further improved, complex preparation processes, and poor corrosion resistance , to achieve the effects of low equipment dependence, excellent mechanical properties, and good anti-fouling and salt-resistance properties

Active Publication Date: 2020-09-01
张春云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the membrane material in the prior art is complicated, the preparation cost is high, the strength is poor, the corrosion resistance is poor, and the anti-fouling performance is poor, these defects limit its application in high-salt wastewater treatment
[0005] The Chinese invention patent with the application publication number CN107486031 discloses an organosilicon composite membrane for the treatment of high-salt wastewater, which is made by the following steps: Coating silica sol on organic materials by high-speed spin coating, and forming after low-temperature heat treatment A very thin layer of inorganic prefabricated layer, and then spin-coat silica sol on the prefabricated layer, and then perform low-temperature heat treatment. This membrane has water stability and high The salt removal rate is high, but its water flux is not high, and its mechanical properties in water need to be further improved

Method used

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  • A polymer membrane for high-salt wastewater treatment and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a polymer membrane for high-salt wastewater treatment, comprising the steps of:

[0031] Ⅰ Preparation of fluorine-containing piperazine amide polymers: Dissolve 10 g of piperazine-2-carboxamide and 24.3 g of 1,4-bis(2',3'-epoxypropyl) perfluorobutane in dimethyl ethylene Form a solution in 100g of sulfone, then add 2g of potassium carbonate to the solution, stir and react at 90°C for 8 hours, then add 4,6-bis(2,2,2-trifluoroethoxy)-1, 1g of 3,5-triazine-2-amine, continue to stir for 1 hour, then cool to room temperature, precipitate in water, wash the precipitated polymer 3 times with water, then wash 4-6 times with ethanol, and then vacuum drying in a drying oven at 70°C for 12 hours to obtain a fluperazine-containing amide polymer;

[0032] II Modified chitosan: Add 30g of chitosan, 5g of chloromethyltriethoxysilane, and 5g of potassium carbonate to 90g of chloroform, stir and react at 50°C for 4 hours, remove the solvent by rotary evaporation...

Embodiment 2

[0037] A method for preparing a polymer membrane for high-salt wastewater treatment, comprising the steps of:

[0038]Ⅰ Preparation of fluoropiperazine amide polymers: Dissolve 10 g of piperazine-2-carboxamide and 24.3 g of 1,4-bis(2',3'-epoxypropyl)perfluorobutane in N,N - Form a solution in 110g of dimethylformamide, then add 3g of sodium carbonate to the solution, stir and react at 93°C for 8.5 hours, then add 4,6-bis(2,2,2-trifluoroethoxy Base)-1,3,5-triazine-2-amine 1g, continue stirring for 1.2 hours, then cool to room temperature, precipitate in water, wash the precipitated polymer 4 times with water, and then wash 5 times with ethanol, Then dry at 73° C. in a vacuum oven for 13 hours to obtain a fluoperazine-containing amide polymer;

[0039] II Modified Chitosan: Add 35g of chitosan, 5g of chloromethyltriethoxysilane, and 5g of potassium carbonate to 100g of acetonitrile, stir and react at 53°C for 4.5 hours, remove the solvent by rotary evaporation to obtain a crude...

Embodiment 3

[0044] A method for preparing a polymer membrane for high-salt wastewater treatment, comprising the steps of:

[0045] Ⅰ Preparation of fluorine-containing piperazine amide polymers: Dissolve 10 g of piperazine-2-carboxamide and 24.3 g of 1,4-bis(2',3'-epoxypropyl) perfluorobutane in N-formazine Form a solution in 125g of pyrrolidone, then add 3.5g of potassium hydroxide to the solution, stir and react at 95°C for 9 hours, then add 4,6-bis(2,2,2-trifluoroethoxy) - 1g of 1,3,5-triazin-2-amine, continue to stir and react for 1.6 hours, then cool to room temperature, precipitate in water, wash the precipitated polymer 5 times with water, then 6 times with ethanol, and then Drying in a vacuum oven at 75°C for 15 hours to obtain a fluperazine-containing amide polymer;

[0046] II Modified chitosan: Add 40g of chitosan, 5g of chloromethyltriethoxysilane, and 5g of potassium carbonate to 125g of acetone, stir and react at 56°C for 5 hours, remove the solvent by rotary evaporation to...

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Abstract

The invention provides a preparation method of a polymer film for treating high-salt wastewater. The method comprises the following steps: I preparation of a fluorine-containing piperazine amide polycondensate; II modification of chitosan; III surface modification of graphene oxide; IV preparation of the film. The invention also discloses a polymer film for treating high-salt wastewater prepared according to the preparation method. The preparation method of the polymer film for treating the high-salt wastewater disclosed by the invention is simple and easy, the dependence on equipment is not high, the demanding on the reaction conditions is not strict, the raw materials are easy to obtain, the price is low, and the product is suitable for large-scale production. The prepared polymer film for treating the high-salt wastewater has the advantages of stable performance, large water flux, high salt removal rate, excellent mechanical properties, and strong corrosion and stain resistance.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a polymer membrane for high-salt wastewater treatment and a preparation method thereof. Background technique [0002] With the advancement of global industrialization, environmental issues and energy issues are still the main factors restricting economic development and social progress. In particular, in recent years, the industrial wastewater represented by papermaking wastewater has a large amount of discharge and is rich in toxic and harmful pollutants. It is very harmful to the ecological environment and people's health, and it is difficult to deal with and purify. Seeking effective wastewater treatment technology to treat industrial wastewater has become a problem that enterprises have to face. [0003] At present, the treatment technologies for industrial wastewater mainly include: biological treatment technology, chemical treatment technology and physical tre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/56B01D67/00B01D69/02C02F1/44
CPCB01D67/0002B01D69/02B01D71/56B01D2325/24C02F1/44
Inventor 不公告发明人
Owner 张春云
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