A kind of reverse osmosis membrane with low energy consumption and large flux and its preparation method and application

A technology of reverse osmosis membrane and large flux, applied in the direction of reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of easy shedding, lower desalination rate, difficulty in preparing inorganic nanoparticles, etc., and achieve hydrophilicity Enhanced performance, high hydrophilicity, and excellent permeability

Active Publication Date: 2022-07-12
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of reverse osmosis membrane with low energy consumption and large flux and its preparation method and application
  • A kind of reverse osmosis membrane with low energy consumption and large flux and its preparation method and application
  • A kind of reverse osmosis membrane with low energy consumption and large flux and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0059] (2) The polysulfone supported membrane was contacted with the above-mentioned aqueous phase solution for 30s, after removing excess water on the membrane surface, and then contacted with the organic phase solution containing 0.15wt% trimesoyl chloride and 0.16wt% tributyl phosphate for 30s, the interface Polycondensation forms a polyamide composite film; wherein, the organic phase solvent is isopar G isoparaffin.

[0060] (3) After the composite membrane was vertically drained in the air for 1min, it was treated in hot air at 100°C for 6min; then it was successively entered into methanol aqueous solution with...

Embodiment 2-8

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

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Abstract

The invention provides a low-energy-consumption high-flux reverse osmosis membrane and a preparation method and application thereof. The structure of the reverse osmosis membrane includes a polysulfone porous support layer and a polyamide desalination layer formed on the support layer. The polyamide desalination layer Contains a hydroxysulfonate and alcohol amine blend internally or on the surface. 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 used in water treatment fields such as industrial water supply and waste water reuse.

Description

technical field [0001] The invention relates to the technical field of water treatment materials, in particular to a low-energy-consumption, high-flux reverse osmosis membrane and a preparation method and application thereof. Background technique [0002] Nowadays, with the development of industry and the surge 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, waste water reuse and so on. [0003] At present, the mainstream commercial reverse osmosis membrane on the market is an aromatic polyamide reverse osmosis composite membrane, which was invented by Dow Filmtec in 1981. The interfacial polycondensation reaction forms the polyamide desalination layer, and the...

Claims

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Application Information

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Patent Type & Authority Patents(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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