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Composition containing silica alumina phosphate molecular sieve, preparation method and application

A technology of silicon-alumina molecular sieve and silicon-aluminophosphate, applied in the direction of hydrocarbon production from oxygen-containing organic compounds, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of weak acid and alkali resistance of SAPO molecular sieves, achieve excellent catalytic performance, improve Olefin selectivity, effect of inhibiting methane growth

Active Publication Date: 2010-01-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The acid and alkali resistance of SAPO molecular sieve is very weak. In US5475182, it is believed that even if SAPO-34 is in the range of 0.001N-0.01N acid concentration, after 24 hours of treatment, the crystallization retention is lower than 30%, but the selectivity to ethylene increases by 9-11%.

Method used

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  • Composition containing silica alumina phosphate molecular sieve, preparation method and application
  • Composition containing silica alumina phosphate molecular sieve, preparation method and application
  • Composition containing silica alumina phosphate molecular sieve, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh the H-SAPO-34 molecular sieve a of comparative example, press P 2 o 5 / Sieve weight ratio 0.034, weigh the corresponding weight of ammonium phosphate, dissolve in an appropriate amount of water, then fully mix with molecular sieves, fully dry at 250°C for 12 hours, then treat at 550°C for 1 hour under a steam atmosphere, and recover Product, to obtain molecular sieve composition b, take part of the crystallized product for X-ray powder diffraction measurement, analysis shows that the weight ratio of molecular sieve and tridymite is 100:5.2.

Embodiment 2

[0036] Weigh the H-SAPO-34 molecular sieve a of comparative example, press P 2 o 5 The / sieve weight ratio is 0.067, weigh the corresponding weight of ammonium dihydrogen phosphate, dissolve it in an appropriate amount of water, then fully mix it with molecular sieves, fully dry it at 250°C for 12 hours, and then treat it under a water vapor atmosphere at 750°C for 1 hour , Recover the product to obtain molecular sieve composition c, take part of the crystallized product for X-ray powder diffraction measurement, analysis shows that the weight ratio of molecular sieve and tridymite is 100:8.7.

Embodiment 3

[0038] Weigh the H-SAPO-34 molecular sieve a of comparative example, press P 2 o 5 / Sieve weight ratio 0.101, weigh the corresponding weight of diammonium hydrogen phosphate, dissolve in an appropriate amount of water, then fully mix with molecular sieves, fully dry at 250°C for 12 hours, and then treat at 850°C for 1 hour in a steam atmosphere , Recover the product to obtain molecular sieve composition d, take part of the crystallized product for X-ray powder diffraction measurement, analysis shows that the weight ratio of molecular sieve and tridymite is 100:13.5.

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Abstract

The invention discloses a composition containing a silica alumina phosphate molecular sieve and application thereof in preparing olefin by conversion of oxygenated compounds. The composition contains the silica alumina phosphate molecular sieve and tridymite according to a weight ratio of 100:0.5 to 100:35, and the composition is obtained by drying a mixture at the temperature of between 80 and 400 DEG C and then treating the dried mixture in water vapor or air or inert atmosphere at the temperature of between 300 and 1,200 DEG C, wherein the mixture is a molecular sieve mixture which accounts for 0.005 to 50 percent of phosphorus by weight of molecular sieve based on P2O5 and is obtained through mixed contact of phosphorus-containing ammonium salt and the silica alumina phosphate molecular sieve. The composition has obvious effects of improving olefin selectivity, in particular ethylene selectivity, reducing the generation of hydrocarbon of over C4<+> and restraining methane increment when the composition is used for conversion reaction of oxygenated compounds such as methanol and the like.

Description

technical field [0001] The present invention relates to a composition containing molecular sieve, a preparation method and its application, more specifically to a composition containing silicoaluminophosphate molecular sieve, a method for preparing the composition and its application. Background technique [0002] Light olefins such as ethylene, propylene, and butene are widely used as basic raw materials for the production of various chemicals and polymers, and play a pivotal role in the modern petrochemical industry. Light olefins have traditionally been obtained from petroleum feedstocks by steam cracking and catalytic cracking processes. But for oil, there are problems of rising prices and unstable supply in the short term, and limited resource reserves in the long run, resulting in an oil crisis. In order to solve the problems of olefin production cost and source of raw materials, the development of technologies that can replace petroleum raw materials to produce light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J21/08C07C1/20C07C11/02
CPCY02P30/20Y02P30/40
Inventor 宋守强张凤美李黎声罗一斌慕旭宏舒兴田
Owner CHINA PETROLEUM & CHEM CORP