Low-energy-consumption high-flux reverse osmosis membrane and preparation method and application thereof

A reverse osmosis membrane, high-flux technology, used in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of reduced salt rejection, easy to fall off, difficult to prepare inorganic nanoparticles, etc., to achieve hydrophilic The effect of improved property, high hydrophilicity, and excellent permeability

Active Publication Date: 2020-12-04
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, adding small molecular organic substances in the interfacial polymerization process can increase the flux, but the desalination rate is seriously reduced; and inorganic nanoparticles are difficult to prepare when used on a large scale, and they are easy to fall off later, which limits their industrial application.

Method used

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  • Low-energy-consumption high-flux reverse osmosis membrane and preparation method and application thereof
  • Low-energy-consumption high-flux reverse osmosis membrane and preparation method and application thereof
  • Low-energy-consumption high-flux reverse osmosis membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The polysulfone supporting membrane prepared by the above method is adopted, and the reverse osmosis membrane is prepared by the following method:

[0058] (1) Prepare an aqueous phase solution with a mass concentration of 2.5 wt% m-phenylenediamine, 1 wt% sodium hydroxymethanesulfonate and 0.05% isopropanolamine, and stir at room temperature to completely dissolve it.

[0059] (2) Contact the polysulfone supporting membrane with the above-mentioned aqueous phase solution for 30s, remove excess water on the surface of the membrane, and then contact the organic phase solution containing 0.15wt% trimesoyl chloride and 0.16wt% tributyl phosphate for 30s, the interface polycondensation to form a polyamide composite film; wherein, the organic phase solvent is isopar G isoparaffin.

[0060] (3) After the composite membrane was drained vertically in the air for 1min, it was treated in hot air at 100°C for 6min; % citric acid aqueous solution for 2 minutes; finally rinse the c...

Embodiment 2-8

[0062] The cross-linked aromatic polyamide reverse osmosis membrane was prepared according to the method in Example 1, the only difference being the types and proportions of raw materials shown in Table 2.

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PUM

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Abstract

The invention provides a low-energy-consumption large-flux reverse osmosis membrane and a preparation method and application thereof, the structure of the reverse osmosis membrane comprises a polysulfone porous support layer and a polyamide desalination layer formed on the support layer, and the interior or the surface of the polyamide desalination layer contains a mixture of hydroxyl sulfonate and alcohol amine. The reverse osmosis membrane provided by the invention has the characteristics of low energy consumption, high hydrophilicity, high water yield and the like, and can be widely appliedto the water treatment fields of industrial water supply, wastewater reuse and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment materials, in particular to a low energy consumption and large flux reverse osmosis membrane, a preparation method and application thereof. Background technique [0002] Nowadays, with the development of industry and the rapid increase of population, the problem of increasing shortage of water resources has attracted more and more attention. Membrane separation, especially reverse osmosis membrane technology, has been widely used due to its high separation efficiency, low energy consumption and less pollution. It is used in water treatment fields such as seawater and brackish water desalination and wastewater reuse. [0003] At present, the mainstream commercial reverse osmosis membrane on the market is aromatic polyamide reverse osmosis composite membrane, which was invented by Dow Filmtec in 1981. This reverse osmosis membrane uses m-phenylenediamine and trimesoyl chloride on the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D69/10B01D69/02B01D67/00B01D61/02
CPCB01D71/56B01D69/105B01D69/02B01D67/0002B01D61/025B01D2325/36Y02A20/131
Inventor 高翔许胜杰苏蕾邬军辉赵伟国孙家宽
Owner WANHUA CHEM GRP CO LTD
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