Unlock instant, AI-driven research and patent intelligence for your innovation.

Reverse osmosis membrane and preparation method and application thereof

A technology of reverse osmosis membrane and reaction time, applied in the field of reverse osmosis membrane, preparation, and sulfonated polyamide composite reverse osmosis membrane, can solve the problems of unattainable performance, high salt rejection, unable to get rid of the constraints of MPD chemical structure, etc. The effect of excellent durability, simple synthesis process and easy promotion

Active Publication Date: 2016-06-08
HUNAN KEENSEN TECH CO LTD
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of these membranes has been partially improved, but at its root, it is still unable to get rid of the shackles of the unique chemical structure of MPD
The problem is that if MPD is completely abandoned, the performance of the final membrane will mostly fail to meet the high desalination rate required by reverse osmosis.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reverse osmosis membrane and preparation method and application thereof
  • Reverse osmosis membrane and preparation method and application thereof
  • Reverse osmosis membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1N, the synthesis of N'-di(4-sulfophenyl)methylenediamineN,N'-bis(4-sulfophenyl)methyldiamine (NSMDA), its structural formula is:

[0039]

[0040] (1) Synthesis of A

[0041] Put 28.6g of benzotriazole white flocculent powder and 250mL of ethanol in a 500mL round-bottomed flask, slowly add 22.5g of aniline solution and 7mL of formaldehyde solution, fix it on an iron stand, stir at room temperature, obtain a white precipitate after 8 hours, pump After filtering and washing with ethanol, 28.6 g of white solid A was obtained (the yield was about 75%).

[0042] (2) Synthesis of B

[0043] Put 28.6gA in a 500mL round bottom flask, add 200mL tetrahydrofuran solution, then slowly add 11.0g sodium borohydride, install a reflux condenser at the mouth of the bottle, and place it in an oil bath for 60 o C was stirred and refluxed, and a viscous liquid was obtained after 12 hours. After suspension steaming, water was added, and dilute hydrochloric acid was added to...

Embodiment 2

[0051] Embodiment 2N, the synthesis of N'-di(4-sulfophenyl)ethylenediamineN,N'-bis(4-sulfophenyl)ethylenediamine (NSEDA), whose structural formula is:

[0052]

[0053] (1) Synthesis of A

[0054] Put 28.6g of benzotriazole white flocculent powder and 250mL of ethanol in a 500mL round-bottomed flask, slowly add 22.5g of aniline solution and 14mL of glyoxal solution, fix it on an iron stand, stir at room temperature, and obtain a white precipitate after 8 hours , and washed with ethanol after suction filtration to obtain white solid A42.1g (yield about 80%).

[0055] (2) Synthesis of B

[0056] Put 32.1gA in a 500mL round bottom flask, add 200mL tetrahydrofuran solution, then slowly add 11.0g sodium borohydride, install a reflux condenser at the mouth of the bottle, place in an oil bath for 60 o C was stirred and refluxed. After 12 hours, a viscous liquid was obtained. After suspension steaming, water was added, and dilute hydrochloric acid was added to adjust the pH to 3-...

Embodiment 3

[0064] Embodiment 3N, the synthesis of N'-di(4-sulfophenyl)propylenediamineN,N'-bis(4-sulfophenyl)propylenediamine (NSPDA), whose structural formula is:

[0065]

[0066] (1) Synthesis of A

[0067] Put 28.6g of benzotriazole white flocculent powder and 250mL of ethanol in a 500mL round-bottomed flask, slowly add 22.5g of aniline solution and 16mL of methylglyoxal solution, fix it on an iron stand, stir at room temperature, and obtain a white precipitate after 8 hours. After suction filtration and washing with ethanol, 48.4 g of white solid A was obtained (the yield was about 83%).

[0068] (2) Synthesis of B

[0069] Put 33.8gA in a 500mL round bottom flask, add 200mL tetrahydrofuran solution, then slowly add 11.0g sodium borohydride, install a reflux condenser at the mouth of the bottle, place in an oil bath for 60 o C was stirred and refluxed, and a viscous liquid was obtained after 12 hours. After suspension steaming, water was added, and dilute hydrochloric acid was ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a sulfonated polyamide composite reverse osmosis membrane and a preparation method and application thereof. According to the reverse osmosis membrane and the preparation method and application thereof, the consumption of MPD (m-phenylenediamine) is completely abandoned, the separation performance of the prepared sulfonated polyamide composite reverse osmosis membrane is equivalent to that of the traditional membrane materials prepared from TMC / MPD, the long-time durability is extremely excellent, and shaded preservation is not required. According to the reverse osmosis membrane and the preparation method and application thereof, during the preparation of the reverse osmosis membrane, the novel multifunctional sulfonation diamine monomer is adopted, the synthesis process is simple, the raw materials are cheap and readily available, an organo-metallic catalyst or high-pressure high-temperature conditions are not required, and the product yield of unit operation of each step is higher than 80%, so that the industrial popularization is easier.

Description

technical field [0001] The invention relates to a reverse osmosis membrane, a preparation method and its application, in particular to a sulfonated polyamide composite reverse osmosis membrane, a preparation method and its application, and belongs to the field of composite reverse osmosis membrane preparation. Background technique [0002] Reverse osmosis membranes are widely used in the field of water treatment. This technology is currently the mainstream desalination method for seawater and brackish water. Most of the current commercial membranes are polyamide composite membranes, such as commonly used polyamide reverse osmosis membranes. The technical principle is in Under the action of the osmotic pressure higher than the solution, these substances are separated from water based on the fact that other substances cannot pass through the semi-permeable membrane. The membrane pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved sal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D71/56B01D67/00B01D69/10B01D69/12C02F1/44C02F103/08
CPCY02A20/131B01D71/82B01D67/0006B01D69/10B01D69/125B01D71/56B01D2325/28B01D2325/30C02F1/441C02F2103/08
Inventor 张轩胡佳慧王连军蒲彦利孙秀云李健生韩卫清沈锦优
Owner HUNAN KEENSEN TECH CO LTD