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Modified nanofiltration membrane suitable for recycling industrial wastewater, and production method and application thereof

A technology of industrial wastewater and nanofiltration membranes, which is applied in chemical instruments and methods, membranes, membrane technologies, etc., can solve the problems that restrict the promotion and application of nanofiltration membrane technology, have little effect, and low water flux, and achieve good industrial application The effect of prospect, simple preparation process and stable performance

Inactive Publication Date: 2017-12-19
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the application of nanofiltration in water treatment, it faces the disadvantages of low water flux and membrane fouling. Restricting the popularization and application of nanofiltration membrane technology

Method used

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  • Modified nanofiltration membrane suitable for recycling industrial wastewater, and production method and application thereof
  • Modified nanofiltration membrane suitable for recycling industrial wastewater, and production method and application thereof
  • Modified nanofiltration membrane suitable for recycling industrial wastewater, and production method and application thereof

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Effect test

Embodiment 1

[0025] 1. Pour 60~80 g of dry PES into a three-necked flask, add 460~500 ml of deionized water, pass high-pressure nitrogen for 15~25 minutes, and add 0.4%~0.6% of BPO. After excitation for 25-30 min, 300-320ml of PEGMA solution was added dropwise, and reacted in a constant temperature water bath at 65-75°C for 1.8-2.2 h. After the reaction was completed, cool to room temperature, immerse the product in absolute ethanol for 20-24 hours, then wash thoroughly, collect the product, and dry it to constant weight at 70-90°C to obtain PES-g-PEGMA.

[0026] 2. Dissolve PES-g-PEGMA and PVB with a total mass ratio of 12~16% in N,N-dimethylformamide, stir in a constant temperature water bath at 75~85°C for 7~8 hours, and then reach a uniform and stable casting Membrane fluid. Degas the casting solution at a constant temperature of 40~50°C and vacuum conditions.

[0027] 3. Pour the obtained mixed casting solution on a clean glass plate, and use a scraper machine to form a flat film wi...

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Abstract

The invention relates to a modified nanofiltration membrane suitable for recycling industrial wastewater, and a production method and an application thereof. The method comprises the following steps: grafting polyethersulfone (PES) with polyethylene glycol methyl ether methacrylate (PEGMA) to obtain hydrophilic PES-g-PEGMA, blending the hydrophilic PES-g-PEGMA with polyvinyl butyral (PVB), and carrying out an immersion precipitation phase inversion technology to produce the PES-g-PEGMA / PVB blend nanofiltration membrane. The nanofiltration membrane produced in the invention has the advantages of simplicity in production, low cost, mild reaction process, strong hydrophilic property, large water flux, high retention rate and strong anti-pollution capability, and is suitable for reusing industrial wastewater reclaimed water in the printing and dyeing industry and the pharmaceutical industry.

Description

technical field [0001] The invention relates to a modified nanofiltration membrane suitable for reuse of industrial wastewater and its preparation method and application. The effluent water quality is excellent and can meet the water quality requirements of printing and dyeing and pharmaceutical factories, and belongs to the field of membrane separation technology in the field of industrial water treatment. . Background technique [0002] In recent years, with the rapid development of industry, the discharge of printing and dyeing and pharmaceutical wastewater has increased year by year, and the pollution caused by printing and dyeing and pharmaceutical wastewater has occurred frequently, resulting in increasingly serious water shortages in the region. [0003] Pollutants in textile printing and dyeing industrial wastewater are mainly dirt, salts, oils and lipids on textile fibers such as cotton and wool, as well as various sizing, dyes, surfactants, auxiliaries, and acids a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/38B01D69/06B01D69/02B01D67/00B01D61/02C02F1/44C02F101/30C02F103/02
CPCB01D61/027B01D67/0009B01D69/02B01D69/06B01D71/38B01D2325/04B01D2325/36C02F1/442C02F2101/308C02F2103/026
Inventor 张亚雷褚华强周雪飞蒋淑红马睿隆佳君张勇
Owner TONGJI UNIV
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