A preparation method of tubular zeolite membrane applied to reverse osmosis water treatment

A technology of reverse osmosis water and zeolite membrane, applied in osmosis/dialysis water/sewage treatment, seawater treatment, non-polluted water treatment, etc., can solve problems such as low desalination rate and cracks, and achieve high desalination rate and large flux Effect

Active Publication Date: 2021-12-21
四川林奥科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, defects such as cracks often appear during high-temperature roasting.
In addition, intergranular defects such as pinholes also appear during the film preparation process.
The above defects lead to low salt rejection of the membrane in reverse osmosis water treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A tubular zeolite membrane for reverse osmosis water treatment was prepared as follows.

[0027] (a) The tubular carrier was pretreated and immersed in a zeolite solution (1%) containing ZSM-5 for seed crystal loading;

[0028] (b) Place the tubular carrier loaded with seed crystals in the casting solution, the casting solution contains template agent TPAOH, silicon source, aluminum source and water for hydrothermal synthesis, the synthesis temperature is 150°C, and the synthesis time is 24h, wherein the silicon source is TEOS, and the aluminum source is sodium metaaluminate;

[0029] (c) Calcining the zeolite membrane synthesized in step (b) at a temperature of 450°C for 4 hours, and the heating and cooling rate is 1°C / min;

[0030] (d) Soak the zeolite membrane to be repaired in deionized water for a whole day, and dry it at 60°C for 6 hours;

[0031] (e) Put the zeolite membrane into the tubular membrane module and perform vacuum degassing treatment for 3 hours;

...

Embodiment 2

[0038] A tubular zeolite membrane for reverse osmosis water treatment was prepared as follows.

[0039] (b) The tubular carrier was pretreated and immersed in a zeolite solution (1%) containing ZSM-5 for seed loading;

[0040] (b) Place the tubular carrier loaded with seed crystals in the casting solution, the casting solution contains template agent TPAOH, silicon source, aluminum source and water for hydrothermal synthesis, the synthesis temperature is 150°C, and the synthesis time is 24h, wherein the silicon source is TEOS, and the aluminum source is sodium metaaluminate;

[0041] (c) Calcining the zeolite membrane synthesized in step (b) at a temperature of 450°C for 4 hours, and the heating and cooling rate is 1°C / min;

[0042] (d) Soak the zeolite membrane to be repaired in deionized water for a whole day, and dry it at 60°C for 6 hours;

[0043] (e) Put the zeolite membrane into the tubular membrane module and perform vacuum degassing treatment for 3 hours;

[0044] ...

Embodiment 3

[0050] A tubular zeolite membrane for reverse osmosis water treatment was prepared as follows.

[0051] (c) The tubular support was pretreated and immersed in a zeolite solution (1%) containing ZSM-5 for seed crystal loading;

[0052](b) Place the tubular carrier loaded with seed crystals in the casting solution, the casting solution contains template agent TPAOH, silicon source, aluminum source and water for hydrothermal synthesis, the synthesis temperature is 150°C, and the synthesis time is 24h, wherein the silicon source is TEOS, and the aluminum source is sodium metaaluminate;

[0053] (c) Calcining the zeolite membrane synthesized in step (b) at a temperature of 450°C for 4 hours, and the heating and cooling rate is 1°C / min;

[0054] (d) Soak the zeolite membrane to be repaired in deionized water for a whole day, and dry it at 60°C for 6 hours;

[0055] (e) Put the zeolite membrane into the tubular membrane module and perform vacuum degassing treatment for 3 hours;

...

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PUM

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Abstract

The invention provides a method for preparing a tubular zeolite membrane applied to reverse osmosis water treatment. The method prepares a tubular zeolite membrane through a traditional secondary growth method, and repairs it after high-temperature roasting. The repair is The aqueous phase solution containing polyamine and the organic phase solution containing acyl chloride are successively passed through the inner and outer sides of the tubular membrane, so that the two-phase solution reflects cross-linking at the defect hole to form polyamide to repair the defect hole. The repair method provided by the invention combines the advantages of the zeolite membrane and the polyamide membrane, improves the desalination rate of the membrane, and keeps the water flux in a relatively high range.

Description

technical field [0001] The invention relates to a method for preparing a membrane, in particular to a method for preparing a tubular zeolite membrane applied to reverse osmosis water treatment. Background technique [0002] Reverse osmosis is a membrane separation technology driven by pressure by means of the function of selectively permeable (semi-permeable) membrane. When the pressure applied in the system is greater than the osmotic pressure of the influent solution, water molecules continuously pass through the membrane. , flows into the central tube through the water flow channel, and then flows out at one end. Impurities in the water, such as ions, organic matter, bacteria, viruses, etc., are trapped on the water inlet side of the membrane, and then flow out at the concentrated water outlet, so as to achieve the purpose of separation and purification. Today, reverse osmosis has large-scale applications in pure water, ultrapure water preparation, wastewater treatment, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D69/04B01D69/02B01D67/00B01D61/02C02F1/44C02F103/08C02F103/04
CPCB01D71/028B01D69/02B01D69/04B01D67/0079B01D67/0093B01D61/025C02F1/441C02F2103/08C02F2103/02Y02A20/131
Inventor 不公告发明人
Owner 四川林奥科技有限公司
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