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Infiltration vaporization blending composite film for removing phenols from waste water

A pervaporation and composite membrane technology, applied in the field of pervaporation blended composite membranes, can solve the problems of limited adsorption capacity, complex process flow, secondary pollution, etc., achieve the best physical and chemical properties, expand the scope of use, and low production costs Effect

Inactive Publication Date: 2007-11-28
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the treatment technologies of phenol-containing wastewater, such as extraction method, adsorption method, biochemical method, electrolysis method and liquid membrane method, all have certain treatment effects on phenol-containing wastewater, but there are problems such as easy to cause secondary pollution, limited adsorption capacity, and energy consumption. High, high processing costs, complex process and other disadvantages, it is difficult to large-scale industrial application

Method used

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  • Infiltration vaporization blending composite film for removing phenols from waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Dissolve polyacrylonitrile in N,N-dimethylacetamide solvent to prepare a membrane solution with a concentration of 16% by mass. After filtration and deaeration, it is cast on a polyester non-woven fabric with a casting thickness of 160μm. , The polyacrylonitrile porous ultrafiltration base membrane is made by gel in water at 15℃.

[0037]Dissolve dimethyl silicone rubber (viscosity 10000Pa.s) with a mass percentage concentration of 70% and trifluoropropyl silicone rubber (viscosity 8000Pa.s) with a mass percentage concentration of 28% in the solvent n-heptane and stir to make it Fully dissolved. Then add the crosslinking agent ethyl orthosilicate with a concentration of 0.7% by mass, dibutyltin dilaurate with a concentration of 0.1% by mass and γ-glycidyl ether oxypropyl trimethoxysilane with a concentration of 1.2% by mass. , Prepare the blended membrane solution, continue to stir and react for a period of time, after filtering and degassing, set aside.

[0038] Treat the ...

Embodiment 2

[0042] Dissolve polyetherimide in N,N-dimethylacetamide solvent to prepare a membrane solution with a concentration of 16% by mass. After filtering and defoaming, it is cast on a polyester non-woven fabric, and the thickness is cast. It is 160μm and gelled in water at 15℃ to make polyetherimide porous ultrafiltration base membrane.

[0043] Dissolve dimethyl silicone rubber with a concentration of 25% by mass (viscosity 20000 Pa.s) and a trifluoropropyl silicone rubber with a concentration of 73% by mass (viscosity 10000 Pa.s) in the solvent n-heptane and stir to make it Fully dissolved. Then add the crosslinking agent ethyl orthosilicate with a concentration of 0.5% by mass, dibutyltin dilaurate with a concentration of 0.1% by mass and γ-glycidyl ether oxypropyl trimethoxysilane with a concentration of 1.4% by mass. , Prepare the blended membrane solution, continue to stir and react for a period of time, after filtering and degassing, set aside.

[0044] Treat the polyetherimide ...

Embodiment 3

[0048] Dissolve polyacrylonitrile in N,N-dimethylacetamide solvent to prepare a membrane solution with a concentration of 18% by mass. After filtration and deaeration, it is cast on a polyester non-woven fabric with a casting thickness of 160μm. , The polyacrylonitrile porous ultrafiltration base membrane is made into polyacrylonitrile porous ultrafiltration membrane by gel in water at 15℃.

[0049] Dissolve dimethyl silicone rubber with a mass percentage concentration of 45% (viscosity 10000 Pa.s) and a trifluoropropyl silicone rubber with a mass percentage concentration of 52.7% (viscosity 8000 Pa.s) in the solvent n-heptane and stir to make it Fully dissolved. Then add the crosslinking agent ethyl orthosilicate with a concentration of 0.75% by mass, dibutyltin dilaurate with a concentration of 0.05% by mass, and γ-glycidyl ether oxypropyl trimethoxysilane with a concentration of 1.5% by mass. , Prepare the blended membrane solution, continue to stir and react for a period of ti...

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Abstract

The present invention belongs to the field of permeating and vaporizing film separation technology, and is especially composite film for treating phenol containing waste water. The composite film is prepared through dissolving polyether imide in solvent, forming base film, treating the base film with surfactant, dissolving trifluoro propyl silicone rubber and dimethyl silicone rubber in the same kind of solvent to form homogeneous mixture solution, adding silane surfactant and other additives, coating the mixture solution onto the base film, and heat treatment of the composite film to obtain the composite film comprising one porous polymer base film and one covering compact separating layer. In waste water treating test, the composite film can separate phenol containing waste water into retained water with low phenol content and permeated water with high phenol content.

Description

Technical field [0001] The invention belongs to the technical field of pervaporation membrane separation, and particularly relates to a pervaporation blended composite membrane used for wastewater dephenolization. Background technique: [0002] Phenol-containing wastewater is one of the industrial wastewaters with wide sources, large amount of water and very serious harm. Phenolic compounds are a kind of strong nerve poison and are locally corrosive, and are toxic to all living organisms. The seriousness of phenols in water pollution is mainly due to their extremely high toxicity to aquatic life and difficulty in biodegradation. In recent years, as the demand for phenolic compounds increases and the scale of production continues to expand, industrial wastewater containing phenols is discharged to the environment It has caused serious pollution, and the treatment of phenol-containing wastewater has become a major problem in water treatment. [0003] The current treatment technolog...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F1/58B01D71/24B01D67/00
Inventor 刘必前王丽华丁怀宇田野
Owner INST OF CHEM CHINESE ACAD OF SCI
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