Preparation method of AlPO-18 molecular sieve membrane

A technology of alpo-18 and molecular sieve, which is applied in the direction of molecular sieve characteristic aluminum phosphate, molecular sieve and alkali-exchanged phosphate, phosphorus compound, etc., can solve problems such as no patent reports and achieve high repeatability
CN103449475AInactive Publication Date: 2013-12-18SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
Publication Date
2013-12-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of an AlPO-18 molecular sieve membrane. The preparation method comprises following steps: (1) mixing and dissolving aluminum source, tetraethylammonium hydroxide, and phosphoric acid in water, then carrying out hydro-thermal synthesis reactions to obtain AlPO-18 molecular sieve crystal seed; (2) coating the AlPO-18 molecular sieve crystal seed on the inner surface of a porous ceramic tube carrier; (3) mixing and dissolving aluminum source, tetraethylammonium hydroxide, and phosphoric acid in water to obtain molecular sieve membrane synthesis mother liquid, putting the ceramic tube, which has been coated with the AlPO-18 molecular sieve crystal seed, in a reactor, adding the molecular sieve membrane synthesis mother liquid, and then carrying out a hydrothermal crystallization treatment so as to obtain an AlPO-18 molecular sieve membrane after aging; (4) burning the membrane tube to remove the template agent so as to obtain an activated AlPO-18 molecular sieve membrane. The AlPO-18 molecular sieve membrane synthesized by the preparation method is capable of being applied to separations of CO2 / CH4 and CO2 / H2, and has a high selectivity and a high throughput of separations of CO2 / CH4 and CO2 / H2.
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Description

technical field

[0001] The invention relates to a preparation method of a molecular sieve membrane, in particular to a preparation method of an AlPO-18 molecular sieve membrane. Background technique

[0002] Natural gas is an important energy and chemical raw material alongside petroleum and coal. The global annual consumption of natural gas is nearly 3 trillion cubic meters per year, accounting for 23.7% of the total energy demand. Natural gas usually contains some impurities, such as water, carbon dioxide, nitrogen, hydrogen sulfide, etc. All natural gas is treated to varying degrees in order to meet pipeline requirements. Natural gas purification is currently the largest industrial gas treatment process, the global market is about 5 billion US dollars per year, mainly to remove CO from natural gas 2 . According to statistics, more than 20% of the natural gas in the United States is due to excessive CO 2 Content requires advanced processing. CO in Shell's gas fields i...

Claims

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