Method for preparing high-performance Y type molecular sieve film and application of the same in organic mixture separation

A molecular sieve, high-performance technology, applied in the direction of mercerized crystalline aluminum silicate zeolite, octahedral crystalline aluminum silicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problem that the support body is not suitable for industrial production, has no patent, and the result cannot be made people's satisfaction

Inactive Publication Date: 2008-12-10
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are very few studies on the separation process of liquid mixtures, especially the separation of binary organic components, and the results are not satisfactory
In addition, the supports used in most patents and literature related to the preparation of Y-type molecular sieve membranes are not suitable for industrial production
[0017] There is very little domestic research on Y-type molecular sieve membranes, and there is no patent in this area yet

Method used

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  • Method for preparing high-performance Y type molecular sieve film and application of the same in organic mixture separation
  • Method for preparing high-performance Y type molecular sieve film and application of the same in organic mixture separation
  • Method for preparing high-performance Y type molecular sieve film and application of the same in organic mixture separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Water glass with a modulus of 3.2 is used as the silicon source, aluminum hydroxide is used as the aluminum source, and sodium hydroxide and deionized water are used as raw materials for the synthesis liquid.

[0044] The porous mullite tube made by Nikkato Co., Ltd. of Japan is used as the substrate for membrane synthesis, and the mullite composition is 67wt% Al 2 o 3 and 33wt% SiO 2 . After the support body is polished with 800 mesh sandpaper and ultrasonically cleaned, a layer of NaY molecular sieve seed crystals is coated.

[0045] Dissolve aluminum hydroxide and sodium hydroxide in deionized water, add water glass under stirring conditions to form a molar ratio of 18Na 2 O: 1Al 2 o 3 : 20SiO2 2 : 1260H 2 O mixture, continue to stir for 2 hours sol. The sol was placed in a sealed polytetrafluoroethylene container and aged at room temperature for 12 hours. The aged sol is poured into a closed stainless steel reaction kettle, and the support body pre-coated w...

Embodiment 2

[0052] Synthesis ratio and preparation steps are the same as in Example 1. The difference is that the crystallization temperature is increased to 110°C. After the synthesized membrane was treated, the pervaporation performance of the membrane was investigated. The results are shown in Table 1.

Embodiment 3

[0054] Synthesis ratio and preparation steps are the same as in Example 1. The difference is that the crystallization temperature is increased to 120°C, and the synthesis time is reduced to 5 hours. After the synthesized membrane was treated, the pervaporation performance of the membrane was investigated. The results are shown in Table 1.

[0055] The supports before synthesis and the membrane tubes after synthesis were characterized by XRD and SEM instruments. XRD was XRD-6100 from Shimadzu, Japan, and SEM was JSM-6350 from JEOL.

[0056] figure 2 The surface microstructure of NaY-type zeolite membranes synthesized on porous mullite supports is shown. The surface of the support is covered by a layer of NaY molecular sieve crystals, and the molecular sieve crystals are staggered and densely grown

[0057] image 3 The cross-sectional morphology of the NaY-type zeolite membrane synthesized on the mullite support is shown. It can be seen from the figure that a continuous ...

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Abstract

The invention provides a method for preparing a high-performance Y-type molecular sieve membrane and an application to the separation of organic mixture. The method is characterized in that a new high-temperature closed hydro-thermal synthesis reaction method is adopted, a layer of dense NaY-type molecular sieve membrane forms on the surfaces of three porous tubular support body. The synthetic time of preparation process is short, and the process of the membrane forming is simple. The membrane prepared by the method has fewer defects, the synthesized NaY-type molecular sieve membrane is used in the separation of organic mixtures by adopting a self-control permeating and vaporizing device, the process of the separation is simple and is easy to be operated and controlled, the separating property is good, the Y-type molecular sieve membrane has high permeation flux and high separation factor while the Y-type molecular sieve membrane is applied to methanol / methyl tert-butyl ether, ethanol / ethyl tertiary butyl ether and benzene / cyclohexane, the NaY-type molecular sieve membrane particularly synthesized by stainless steel support body has extremely high permeation flux.

Description

technical field [0001] The invention provides a preparation method of a high-performance Y-type molecular sieve membrane material and its application in the separation of organic matter mixture, which belongs to the field of permeation and separation of inorganic materials. Background technique [0002] Membrane separation technology is one of the hotspots of recent research, and its development speed is very fast. Because membrane separation is more economical than traditional separation processes and has an ideal energy efficiency ratio, membrane separation technology is widely used in water treatment fields in chemical, petroleum, environmental, food, and electronic industries. In the past few decades, various organic and inorganic membranes have been used in practical technical fields such as microfiltration, nanofiltration, dialysis, reverse osmosis, pervaporation, vapor permeation, and gas separation. [0003] Pervaporation and steam permeation technology are importan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24C01B39/26
Inventor 陈祥树周荣飞王振卓袁慧
Owner JIANGXI NORMAL UNIV
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