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Preparation method of high-throughput biological pollution-resistant oxidation-resistant reverse osmosis membrane

An anti-biological fouling and reverse osmosis membrane technology, applied in chemical instruments and methods, reverse osmosis, water pollutants, etc., can solve the problem that the flux of reverse osmosis membrane membrane cannot meet production needs, and achieve large flux and good adsorption. effect, the effect of dense membrane structure

Inactive Publication Date: 2019-03-22
启成(江苏)净化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, with the continuous development of the economy, the membrane flux of the reverse osmosis membrane of the prior art is far from meeting the production demand.

Method used

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  • Preparation method of high-throughput biological pollution-resistant oxidation-resistant reverse osmosis membrane
  • Preparation method of high-throughput biological pollution-resistant oxidation-resistant reverse osmosis membrane
  • Preparation method of high-throughput biological pollution-resistant oxidation-resistant reverse osmosis membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of the reverse osmosis membrane of the present invention includes the following steps:

[0044] 1) Configuration of polymer solution A: take 180g polysulfone, 10g polyvinylpyrrolidone (K30), 710g N, N-dimethylformamide (DMF), 80g ethylene glycol dimethyl ether, 7000 mesh granular activated carbon powder 20g, mixed into the polymer solution A of the casting liquid (the viscosity of the polymer solution A is 800-1000 centipoise), gradually increase the temperature to 60℃, stir and dissolve for 6 hours, and then vacuum defoam; the activated carbon can be coal-based carbon, nutshell carbon or Coconut shell carbon can also be other modified granular activated carbons such as silver-loaded activated carbon (silver content is about 400 mg / kg). Preferably, a combination of coconut shell carbon and silver-loaded activated carbon is used;

[0045] 2) Preparation of the prefabricated porous support layer: The experiment was carried out on the self-made equipment,...

Embodiment 2

[0053] The preparation method of the reverse osmosis membrane of the present invention includes the following steps:

[0054] 1) Configuration of polymer solution A: take 180g polysulfone, 10g polyvinylpyrrolidone (K30), 725g N, N-dimethylformamide (DMF), 60g ethylene glycol dimethyl ether, 800 mesh granular activated carbon powder 15g, mixed into a casting solution, gradually heated to 60℃, stirred and dissolved for 6 hours, and then vacuum degassed;

[0055] 2) Preparation of the prefabricated porous support layer: The experiment was carried out on the self-made equipment, and the width of the effective membrane was 300mm. The details are as follows: Spread the casting liquid uniformly on the 100μm polyester non-woven fabric support layer with a spatula, and then quickly enter the purified water at 10°C. After the gel is completed after 30s, put the film in purified water at about 65°C Soak so that the residual solvent diffuses out, and the air knife blows dry the surface moistu...

Embodiment 3

[0063] The preparation method of the reverse osmosis membrane of the present invention includes the following steps:

[0064] 1) Preparation of polymer solution A: 180g of sulfonated polysulfone with a sulfonation degree of 30%, polyvinylpyrrolidone (K30) 10g, N, N-dimethylformamide 710g, ethylene glycol 80g, 7000 mesh 20g silver-loaded granular activated carbon powder (silver content about 400 mg / kg), mixed into a casting solution, gradually heated to 60°C, stirred and dissolved for 6 hours, and then vacuum degassed;

[0065] 2) Preparation of the prefabricated porous support layer: The experiment was carried out on the self-made equipment, and the width of the effective membrane was 300mm. The details are as follows: Use a spatula to evenly spread the casting liquid on the 100μm polyester non-woven fabric support layer, and then quickly enter the 13°C pure water, after 30s, after the gel is completed, put the film in the 70°C pure water Soak so that the residual solvent diffuses...

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Abstract

The invention discloses a preparation method of a high-throughput biological pollution-resistant oxidation-resistant reverse osmosis membrane and relates to the technical field of preparation of reverse osmosis membranes. The invention particularly relates to a preparation method of the high-throughput biological pollution-resistant oxidation-resistant reverse osmosis membrane. The invention provides the preparation method of the high-throughput biological pollution-resistant oxidation-resistant reverse osmosis membrane by controlling a micro-porous support. According to the method disclosed by the invention, an activated carbon powder is added into a casting solution for preparing an ultrafiltration base membrane so as to prepare an activated carbon filled micro-porous support layer, andan appropriate treatment method is adopted, so that the performance of the reverse osmosis membrane is optimized. Since the activated carbon is large in specific surface area and high in adsorption capacity, the produced membrane structure is dense, obtains high throughput and has an effect of adsorbing residual chlorine, bacteria and organic matters in water. Therefore, the reverse osmosis membrane has the advantages of being resistant to chlorine and resistant to biological pollution, and the service life can be prolonged. The non-solved technical problem in the industry that a smooth and complete desalination layer cannot be obtained is solved.

Description

Technical field [0001] The invention relates to the technical field of reverse osmosis membrane preparation, in particular to a preparation method of a high-flux, anti-biological pollution and anti-oxidation reverse osmosis membrane. Background technique [0002] Reverse osmosis (RO) technology first originated abroad. Its principle is to separate dissolved salts, colloids, microorganisms, organics and other substances in water from the semipermeable membrane under the action of higher than the osmotic pressure of the solution. . As the industry with the highest technical content in the field of membrane separation, reverse osmosis membrane is also one of the fastest-growing membrane markets in the world for China’s membrane industry. It is currently widely used in ultrapure water preparation, food, chemical, pharmaceutical, biochemical, environmental protection, Various concentration and separation processes in metallurgy and other fields. It is expected that the Chinese membr...

Claims

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Application Information

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IPC IPC(8): B01D61/02B01D67/00B01D69/02B01D69/12B01D71/02B01D71/68C02F1/44C02F101/30
CPCB01D61/025B01D67/0079B01D69/02B01D69/12B01D71/021B01D71/68C02F1/441C02F2101/30B01D2325/36Y02A20/131
Inventor 徐强强李爱祥邹峰
Owner 启成(江苏)净化科技有限公司
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