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Preparation method of molecular sieve membrane

一种分子筛膜、分子筛的技术，应用在化学仪器和方法、膜技术、半透膜分离等方向，能够解决低成材率、很难实验工业化应用等问题，达到增加水通量、改善亲水性的效果

Inactive Publication Date: 2020-09-18
韩小学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of ZSM-5 molecular sieve membranes by the template-free method has extremely strict preparation conditions and a low yield. Even if the laboratory is successful, it is difficult to experiment with industrial applications.

Method used

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  • Preparation method of molecular sieve membrane
  • Preparation method of molecular sieve membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Firstly, large-particle silicalite-1 molecular sieve particles (average particle size 1.5 μm after particle size test) and small particle ZSM-5 molecular sieve particles (average particle size 500 nm after particle size test) were prepared by in-situ synthesis and microwave synthesis. And prepare 2wt.% concentration of the seed liquid.

[0027] After pretreatment, one end of the purchased α-alumina tubular porous carrier is closed, and the other end is vacuum-sucked with large particles of silicalite-1 molecular sieve seed liquid (vacuum degree 0.09MPa, suction time 30s) and dried. Coat small particles of ZSM-5 molecular sieve seed liquid (40s) and dry for later use.

[0028] To prepare ZSM-5 casting solution, mix tetrapropylammonium hydroxide (TPABr), aluminum oxide, silicon oxide, sodium oxide, sodium chloride and water, and stir vigorously to prepare a casting solution (gel). Its molar ratio is 1:84:10:100:3500:10.

[0029]The porous carrier was placed in a reactio...

Embodiment 2

[0035] Firstly, large-particle silicalite-1 molecular sieve particles (average particle size 1.5 μm after particle size test) and small particle ZSM-5 molecular sieve particles (average particle size 500 nm after particle size test) were prepared by in-situ synthesis and microwave synthesis. And prepare 2wt.% concentration of the seed liquid. At the same time, NaA molecular sieves (average particle size 1.8 μm) were synthesized by hydrothermal method, and a seed solution with a concentration of 2wt.% was also prepared.

[0036] After pretreatment, one end of the purchased α-alumina tubular porous carrier is closed, and the other end is vacuum-sucked with large particles of silicalite-1 molecular sieve seed liquid (vacuum degree 0.09MPa, suction time 30s) and dried. Coat small particles of ZSM-5 molecular sieve seed liquid (40s) and dry for later use.

[0037] To prepare ZSM-5 casting solution, mix tetrapropylammonium hydroxide (TPABr), aluminum oxide, silicon oxide, sodium ox...

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Abstract

The invention discloses a preparation method of a molecular sieve membrane, which comprises the following steps: carrying out cyclodextrin modification on a roasted ZSM-5 molecular sieve membrane, andcontinuing to synthesize a NaA molecular sieve layer on the roasted ZSM-5 molecular sieve membrane. According to the method, the separation effect of ZSM-5 containing defect holes can be improved, and the hydrophilicity of the whole molecular sieve membrane is improved under the action of the hydrophilic NaA molecular sieve layer, so that the water capacity is integrally improved.

Description

technical field [0001] The application relates to a preparation method of a ceramic membrane, in particular to a preparation method of a molecular sieve membrane. Background technique [0002] Organic solvents play a pivotal role in modern industry and can be used in many fields such as medicine, chemical industry, materials, and metallurgy. In some applications, the purity requirements of organic solvents are relatively strict, for example, the purity of organic solvents is required to be above 99.99%, and water is one of the common types of impurities in organic solvents. Because it is miscible with certain organic solvents, it is dehydrated It is very important when refining the product. [0003] Among the existing organic solvent dehydration processes, pervaporation is an ideal process, which has many advantages such as low energy consumption and simple process. For the pervaporation process, the pervaporation membrane is the key factor in the pervaporation process. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00
CPCB01D67/0041B01D71/028
Inventor 韩小学
Owner 韩小学
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