A two-dimensional layered zeolite molecular sieve membrane with high separation stability and its preparation method and application

A zeolite molecular sieve membrane and two-dimensional layered technology, which is applied in the field of high separation stability two-dimensional layered zeolite molecular sieve membrane and its preparation, can solve the problems of uncontrollable growth process, poor application and promotion, and complicated preparation conditions. Achieve good separation and selectivity, easy preparation and simple operation

Active Publication Date: 2022-08-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing methods for preparing zeolite membranes by in-situ growth are secondary growth on hollow fiber membranes. The preparation conditions are complicated, the growth process is uncontrollable, the base membrane is single, and the application and promotion are not strong, and they are all applied in gas separation. , no application in filtration and separation of pollutants in water treatment

Method used

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  • A two-dimensional layered zeolite molecular sieve membrane with high separation stability and its preparation method and application
  • A two-dimensional layered zeolite molecular sieve membrane with high separation stability and its preparation method and application
  • A two-dimensional layered zeolite molecular sieve membrane with high separation stability and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0041] A preparation method of a two-dimensional layered zeolite molecular sieve membrane with high separation stability, the steps are as follows:

[0042] (1) 10.7ml of cyclohexylimide, 1.4g of sodium hydroxide and 0.75g of sodium aluminate were added to 185ml of distilled water and stirred, and 38.4ml of silica sol (30%) was added to the system to make a mixed solution. After stirring and aging for 5 hours, it was transferred to a stainless steel kettle lined with polytetrafluoroethylene, and crystallized at 150 ° C for 16 days. After the crystallization, washed with water until neutral, and dried to obtain a zeolite precursor (MCM-22 (MCM-22 ( P));

[0043] (2) After stirring the zeolite precursor (MCM-22(P)): CTAB:TPAOH=1:4:1 at room temperature for 16 hours, washing with water and centrifuging to remove the excess swelling agent to obtain the swollen MWW zeolite MCM-22 ( S), take 1g of MCM-22(S) and 10ml of hydroxyl-terminated polybutadiene to mix ultrasonically for 24 ...

Embodiment 2

[0046] A preparation method of a two-dimensional layered zeolite molecular sieve membrane with high separation stability, the steps are as follows:

[0047] (1) 12.49ml of cyclohexylimide, 1.8g of sodium hydroxide and 0.36g of sodium aluminate were added to 133ml of distilled water and stirred, and 36.58ml of silica sol (30%) was added to the system to make a mixed solution. After stirring and aging for 24 hours, it was transferred to a stainless steel kettle lined with polytetrafluoroethylene, crystallized at 160 ° C for 21 days, washed with water to neutrality after crystallization, and dried to obtain a zeolite precursor (MCM-22 (MCM-22 ( P));

[0048] (2) After stirring the zeolite precursor (MCM-22(P)): CTAB:TPAOH=1:5.6:2.4 at room temperature for 16 hours, washing with water and centrifuging to remove the excess swelling agent to obtain the swollen MWW zeolite MCM-22 ( S), take 1 g of MCM-22 (S) and 10 ml of hydroxyl-terminated polybutadiene in chaotic flow and stir for...

Embodiment 3

[0051] A preparation method of a two-dimensional layered zeolite molecular sieve membrane with high separation stability, the steps are as follows:

[0052] (1) 0.17g Al 2 (SO 4 ) 3 ·18H 2 O and 0.4ml H 2 SO 4 Add 300ml of distilled water, dissolve and add 1.86g[C 22 H 45 -N + (CH 3 ) 2 -C 6 H 12 -N + (CH 3 ) 2 -C 6 H 13 ]Br 2 and 12.7ml of ethanol, then 0.5g of NaOH was added, and 15.4ml of ethyl orthosilicate was added dropwise to the above system under vigorous stirring to make a mixed solution. After stirring and aging for 24 hours, the mixed solution was transferred to polytetrafluoroethylene In a stainless steel kettle lined with vinyl fluoride, crystallize at 160 °C for 7 days. After the crystallization, wash with water until neutral, and dry to obtain zeolite precursor (MFI);

[0053] (2) 1 g of zeolite precursor (MFI) and 10 ml of carboxyl-terminated polybutadiene were stirred in a chaotic flow for 1 hour to prepare a 10% two-dimensional zeolite susp...

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Abstract

The present invention involves a high -separation stability two -dimensional laminar -shaped boiler molecular sieve film. The two -dimensional layer -like boiler molecular sieve film is filtered from the diverse two -dimensional boiler suspension vacuum to the support body.After the vitamin suspension of turbidity is diluted, the vacuum filter is loaded to the support body. After drying, it obtains a high -separation stability two -dimensional boiled stone molecular sieve. It is simple and good in operation.Sexuality and good water flux, and have a good separation selective performance for molecular pollutants above ~ 2nm, high membrane stability, simple preparation, and providing a new possibility for the application of Zi in water treatment.

Description

Technical field: [0001] The invention relates to a two-dimensional layered zeolite molecular sieve membrane with high separation stability, a preparation method and application thereof, and belongs to the technical field of membrane preparation of functional materials. Background technique: [0002] In recent years, with the warming of the global climate and the increasing population, the shortage of fresh water resources and water pollution have become increasingly serious. Water treatment technology is to remove pollutants in water, improve water quality through physical, chemical, physicochemical or biological methods, so that water bodies meet water quality requirements. The complexity of pollutants and the strictness of water quality standards make many traditional methods unable to meet the needs of the current stage. Therefore, under the circumstance of continuous reduction of water resources, it is particularly important to find high-efficiency, energy-saving and gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04B01D71/02B01D67/00C02F1/44
CPCC01B39/04B01D71/028B01D67/0051C02F1/44C01P2004/03C01P2004/01Y02C20/40
Inventor 王志宁纪晓妍杜聪慧
Owner SHANDONG UNIV
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