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Preparation method of cancrinite molecular sieve membrane catalyst

A molecular sieve and cancryptite technology, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as toxic equipment, increased process costs, and corrosion, and achieve strong adaptability, low cost, and The effect of improving economy

Inactive Publication Date: 2014-02-05
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the template not only increases the cost of the process, but most of the organic templates are toxic to the environment and corrosive to the equipment.

Method used

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  • Preparation method of cancrinite molecular sieve membrane catalyst
  • Preparation method of cancrinite molecular sieve membrane catalyst
  • Preparation method of cancrinite molecular sieve membrane catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Support body preparation: select ceramic Raschig rings as the support body, first polish the surface smooth, boil in NaOH solution for a period of time, and then ultrasonically rinse with deionized water.

[0031] 2. Preparation of cancryptite molecular sieve crystal seeds: Weigh 6.0 g NaOH and dissolve it in 60.0 mL of deionized water, stir to dissolve it completely, add 3.0 g of sodium aluminate to the above NaOH solution and stir until completely dissolved, then Dissolve 52.0g of sodium silicate nonahydrate in the above mixture, stir for about 10-20min, and mix well. The above solution was transferred to a three-necked flask, stirred and reacted in a water bath at a constant temperature of 80 °C, and the pH value was adjusted to 14 with sulfuric acid, and the reaction was maintained for 3 hours. The obtained material was transferred into an autoclave and placed in a dry oven for crystallization at 170 °C for 3 h. The crystallized product was taken out, filtered, ...

Embodiment 2

[0044] 1. Preparation of the support body: select a glass sheet as the support body, first wash it with ethanol ultrasonically, then wash it with deionized water and then dry it.

[0045] 2. Preparation of cancryptite molecular sieve crystal seeds: Weigh 6.0 g NaOH and dissolve it in 60.0 mL of deionized water, stir to dissolve it completely, add 3.0 g sodium aluminate to the above NaOH solution and stir until completely dissolved, then Dissolve 52.0g of sodium silicate nonahydrate in the above mixture, stir for about 10-20min, and mix well. The above solution was transferred to a three-necked flask, stirred and reacted in a water bath at a constant temperature of 60 °C, and the pH value was adjusted to 14 with nitric acid, and the reaction was maintained for 3 hours. The obtained material was transferred into an autoclave and placed in a dry oven for crystallization at 170 °C for 3 h. The crystallized product was taken out and filtered, then fully washed with deionized water, ...

Embodiment 3

[0056] 1. Support body preparation: select stainless steel metal sheet as the support body, first wash it with ethanol ultrasonically, then wash it with deionized water and then dry it.

[0057] 2. Preparation of cancryptite molecular sieve crystal seeds: Weigh 6.0g NaOH and dissolve it in 60.0mL deionized water, stir to dissolve it completely, add 3.0g sodium aluminate to the above NaOH solution and stir until completely dissolved, then Dissolve 52.0g of sodium silicate nonahydrate in the above mixture, stir for about 10-20min, and mix well. The above solution was transferred to a three-necked flask, stirred and reacted in a water bath at a constant temperature of 60°C, and the pH value was adjusted to 13 with sulfuric acid, and the reaction was maintained for 3 hours. The obtained material was transferred into an autoclave and placed in a dry oven for crystallization at 170 °C for 3 h. The crystallized product was taken out and filtered, then fully washed with deionized wat...

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Abstract

The invention provides a preparation method of a cancrinite molecular sieve membrane catalyst, and belongs to the technical field of membrane material production. The preparation method comprises the following steps: coating cancrinite molecular sieve seed crystals on supports, then placing in crystallization liquid formed by NaOH, sodium aluminate and sodium metasilicate nonahydrate for in-situ crystallization membrane formation, and finally carrying out ion exchange so as to obtain the cancrinite molecular sieve membrane catalyst. The preparation method has the characteristics that the batch operation is adopted, and the cancrinite molecular sieve membrane catalyst is obtained by coating the cancrinite molecular sieve seed crystals on the different types of supports and then carrying out ion exchange after forming the membranes on the supports in situ. Due to the adoption of the preparation method, the technology is simplified, and the economical efficiency of a membrane catalyst preparation technology is improved.

Description

technical field [0001] The invention belongs to the technical field of membrane material production, in particular to a method for preparing a cancryptite molecular sieve membrane catalyst. Background technique [0002] Membrane materials have good application prospects in the field of catalysis. Among them, the membrane catalyst prepared by molding the porous material into a membrane can couple the reaction and the separation operation process, thereby changing the degree of the reaction. On the one hand, this improves the conversion rate of the reaction, on the other hand, it also reduces the load of subsequent separation operations. The preparation technology of membrane catalyst determines its activity and stability. Therefore, the development of convenient and stable membrane catalyst preparation technology is of great significance. [0003] Membrane catalyst is usually an inorganic porous membrane material, and it is prepared by loading or introducing active ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J35/10
Inventor 贾哲华章译之陈凯赵有华
Owner YANGZHOU UNIV
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