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A kind of reverse osmosis membrane and preparation method thereof

A technology of reverse osmosis membrane and support layer, which is applied in the direction of semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., and can solve problems such as poor chlorine resistance

Active Publication Date: 2017-05-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a reverse osmosis membrane with excellent chlorine resistance and a preparation method thereof in order to overcome the poor chlorine resistance of existing reverse osmosis membranes

Method used

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  • A kind of reverse osmosis membrane and preparation method thereof
  • A kind of reverse osmosis membrane and preparation method thereof
  • A kind of reverse osmosis membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of reverse osmosis membrane provided by the invention comprises the following steps:

[0037] (1) forming a support layer containing a mixture of halogenated polyethersulfone represented by formula (1) and / or formula (2) and polysulfone and / or non-halogenated polyethersulfone;

[0038] (2) forming a separation layer on one surface of the support layer, the separation layer being a polyamide layer;

[0039]

[0040]

[0041] Among them, R 1 with R 2 The same or different, each independently CH 2 X or CH 3 , and R 1 with R 2 not at the same time as CH 3 , X is a halogen atom; R 3 -R 10 The same or different, each independently CH 2 Y or CH 3 , and R 3 -R 10 not at the same time as CH 3 , Y is a halogen atom; m+n=A, A is an integer of 50-250; x+y=W, and W is an integer of 80-300.

[0042] The halogen atom may be a fluorine atom, chlorine atom, bromine atom or iodine atom, but from the viewpoint of availability of raw materials, th...

preparation example

[0053] In the following preparation examples, examples and comparative examples:

[0054] (1) The nuclear magnetic spectrum of brominated polyether sulfone PES-Br and brominated polyether sulfone PAES-Br adopts Swiss Bruker company AVANCE DRX400MHz nuclear magnetic resonance spectrometer to measure, and solvent is deuterated chloroform; Number average molecular weight adopts 410 of Waters company Gel permeation chromatography was used for determination, wherein THF was used as the mobile phase, narrow distribution polystyrene was used as the standard sample, and the test temperature was 25°C.

[0055] (2) The degree of bromination of brominated polyethersulfone PES-Br is calculated by nuclear magnetic integration, and the specific calculation formula is as follows:

[0056]

[0057] Among them, ∑H a Represent-CH 2 The sum of the peak areas of hydrogen atoms in Br, ΣH b Represent-CH 3 The sum of the peak areas of the hydrogen atoms, n represents the degree of bromination...

Embodiment 1

[0073] This example is used to illustrate the reverse osmosis membrane provided by the present invention and its preparation method.

[0074] Prepare reverse osmosis membrane according to the method of comparative example 1 and carry out the mensuration of water flux and desalination rate, difference is, described polysulfone is replaced with the mixture of the PES-Br of 1 weight part and the polysulfone of 16 weight parts, obtain reverse osmosis The permeable membrane M1, wherein the support layer has a thickness of 50 microns, and the separation layer has a thickness of 0.31 microns. The water flux and desalination rate of the reverse osmosis membrane M1 are shown in Table 1.

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Abstract

The invention provides a reverse osmosis membrane and a preparation method thereof. The reverse osmosis membrane comprises a supporting layer and a separating layer on a surface of the supporting layer; the separating layer is a polyamide layer, and the supporting layer is a layer formed by a mixture of a halogenated polyethersulfone shown as a formula (1) and / or (2), and a polysulfone and / or a non-halogenated polyethersulfone, wherein R1 and R2 are same or different, are independently CH2X or CH3, and are not CH3 at the same time, X is a halogen atom, R3-R10 are same or different, are independently CH2Y or CH3, and are not CH3 at the same time, Y is a halogen atom, m+n=A, A is an integer of 50-200, x+y=W, and W is an integer of 80-300. The provided reverse osmosis membrane possesses extremely excellent chloride-resisting performance.

Description

technical field [0001] The invention relates to a reverse osmosis membrane and a preparation method thereof. Background technique [0002] Membrane separation is a new separation technology that appeared in the early 20th century and rose rapidly after the 1960s. Because membrane separation technology not only has the functions of separation, concentration, purification and refining, but also has the characteristics of high efficiency, energy saving, environmental protection, molecular level filtration, simple filtration process and easy control, it has been widely used in food, medicine, biological , environmental protection, chemical industry, metallurgy, energy, petroleum, water treatment, electronics, bionics and other fields, and has produced huge economic and social benefits, and has become one of the most important means of separation technology today. The core of membrane separation technology is the separation membrane. Porous membranes can be divided into microfi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/56B01D71/68B01D69/10
Inventor 张杨刘轶群潘国元郭敏严昊
Owner CHINA PETROLEUM & CHEM CORP
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