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Method for synthesizing hydrophilic ZSM-5 zeolite molecular sieve membrane

A technology of zeolite molecular sieve membrane and ZSM-5, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of long synthesis time, easy temperature gradient, influence, etc., and achieve shortened synthesis time and good Separation performance, effect of high separation performance

Inactive Publication Date: 2016-02-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their methods take a long time to synthesize, and are prone to the influence of temperature gradients in the conventional heat transfer process.

Method used

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  • Method for synthesizing hydrophilic ZSM-5 zeolite molecular sieve membrane
  • Method for synthesizing hydrophilic ZSM-5 zeolite molecular sieve membrane
  • Method for synthesizing hydrophilic ZSM-5 zeolite molecular sieve membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare the hydrophilic ZSM-5 molecular sieve membrane as follows:

[0037] (1) Treatment of porous carrier tube: the porous carrier used in the synthesis of ZSM-5 molecular sieve membrane is α-Al 2 o 3 The carrier tube has an average pore diameter of 2-3 μm and a porosity of 30%-40%. α-Al 2 o 3 Before coating the crystal, the carrier tube was polished to a smooth surface with sandpaper, then ultrasonically cleaned with deionized water, and finally dried overnight in an oven at 80°C for future use.

[0038] (2) Preparation of ZSM-5 seed liquid: get 0.5gZSM-5 zeolite molecular sieve (Shanghai Zhuoyue Chemical Technology Co., Ltd., SiO 2 / Al 2 o 3 =15~45) Add 100g of deionized water, use a magnetic stirrer to stir and disperse the solution evenly, and place it in an ultrasonic wave to vibrate at intervals during the process, prepare a ZSM-5 seed liquid with a mass fraction of 0.5wt%, and mix the seed liquid After ultrasonic stirring for 0.5h, it was used for later ...

Embodiment 2

[0048] By the same operation of Example 1, only the mol ratio of each component in the synthetic liquid is:

[0049] NaOH: Al source: Si source: H 2 O:NaF=0.4:0.08:1:120:0.8, the synthesized ZSM-5 zeolite molecular sieve membrane also has good pervaporation separation performance. For 90wt.% acetic acid dehydration and 90wt.% isopropanol dehydration, the permeation flux is 0.6kg / m 2 h and 3.1kg / m 2 h, the separation factors were 1200 and 3100, respectively.

Embodiment 3

[0051] By the same operation of Example 1, only the mol ratio of each component in the synthetic liquid is:

[0052] NaOH: Al source: Si source: H 2 O:NaF=0.8:0.5:3:300:1.8, the pervaporation separation performance of the synthesized ZSM-5 zeolite molecular sieve membrane is better than that of Example 2. For dehydration of 90wt.% acetic acid and 90wt.% isopropanol respectively, the permeation flux is 0.7kg / m 2 h and 3.5kg / m 2 h, the separation factors were 1700 and 4300, respectively.

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Abstract

The invention discloses a method for rapidly and efficiently synthesizing a hydrophilic ZSM-5 zeolite molecular sieve membrane. According to the invention, a microwave heating technology is adopted, so that the synthesis time of the ZSM-5 zeolite molecular sieve membrane is shortened greatly; a conventional hydrothermal synthesis mode is adopted, so that the prepared ZSM-5 zeolite molecular sieve membrane has extremely high hydrophilicity and acid resistance, has an excellent separating property for organic matter solution dehydration or acidic organic solution dehydration, can be widely applied to organic solvent dehydration, organic acid dehydration, organic matter dehydration under the acid environment and the like and has an important and wide application prospect.

Description

technical field [0001] The invention relates to the synthesis and application of a ZSM-5 zeolite molecular sieve membrane, and in particular provides a new method for synthesizing a hydrophilic ZSM-5 zeolite molecular sieve membrane by using a microwave heating method. Background technique [0002] In the fields of petrochemical, fine chemical, pharmaceutical chemical and new energy, the preparation and purification of organic solvents is an essential process. However, the purification of organic solvents by traditional separation methods often has the disadvantages of high energy consumption, poor separation effect, large equipment investment, and secondary pollution. [0003] As one of the new membrane separation technologies, pervaporation separation has the following main characteristics: the separation process is not limited by the gas-liquid balance. For specific separation tasks, compared with traditional separation techniques, pervaporation has the advantages of low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/10
Inventor 杨建华李良清李佳佳王金渠鲁金明潘恩泽张艳殷德宏
Owner DALIAN UNIV OF TECH
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