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A kind of preparation method of inorganic reverse osmosis membrane for water treatment

A technology of reverse osmosis membrane and water treatment, which is applied in water/sewage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc. It can solve the problems of reduced flux and no industrial application examples.

Active Publication Date: 2020-10-13
保定源汉升新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of reverse osmosis membrane is limited to the laboratory research stage, and there is no industrial application example. One of the reasons is that in order to ensure the selectivity of the membrane, it is usually necessary to make the separation layer thicker, and when the selectivity is improved, the flux become smaller, so it is not yet recognized by the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Polish the tubular carrier made of alumina with 1500-mesh sandpaper, and soak it in deionized water for ultrasonic treatment, 1M hydrochloric acid solution for ultrasonic treatment, 1M sodium hydroxide solution for ultrasonic treatment, and deionized water for ultrasonic treatment, then place it at 60°C Dry it in an oven, and bake it in a muffle furnace at 550°C to remove organic matter, and the temperature rise and fall are 1°C / min;

[0025] (2) The preparation molar ratio is 5SiO 2 :3Al 2 o 3 :7Na 2 O:500H 2 For the first casting solution of O, vertically immerse the pretreated carrier in the first casting solution, statically hydrothermally synthesize at 50° C. for 5 hours, and wash, soak, and dry to obtain the primary film;

[0026] (3) Immerse the primary film obtained in step (2) in a 5M hydrochloric acid solution, the immersion time is 5s, repeat 2 times, and wash to neutral with deionized water, place in an oven to dry;

[0027] (4) Preparation of 5SiO ...

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PUM

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Abstract

The invention provides a method for preparing an inorganic reverse osmosis membrane for water treatment. By dividing the separation layer into a relatively loose layer and a relatively dense layer, the desalination rate of the membrane material can be guaranteed under the condition of the same membrane thickness. Basically, the water flux of the inorganic reverse osmosis membrane is significantly improved, which is beneficial to the subsequent industrial application.

Description

technical field [0001] The invention relates to a preparation method of a reverse osmosis membrane, in particular to a preparation method of a zeolite-based reverse osmosis membrane. Background technique [0002] In today's world, water resource problems, including water pollution and water shortage, are becoming more and more serious, which has been highly valued by researchers and even ordinary people around the world. Among many water treatment technologies, reverse osmosis technology has gradually expanded from seawater desalination to wastewater treatment, municipal water reuse, etc., and has received more and more attention. With the development of reverse osmosis technology, membrane materials have gradually become the bottleneck restricting the application of reverse osmosis. [0003] In the prior art, the preparation of reverse osmosis membranes mainly focuses on materials such as polyamide and cellulose, all of which are organic materials, and are increasingly res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D71/02B01D61/02C02F1/44
CPCB01D61/025C02F1/441B01D67/0044B01D67/0088B01D67/0095B01D69/12C02F2101/10Y02A20/131
Inventor 邱海兵
Owner 保定源汉升新材料科技有限公司