Cobalt modification silicoaluminophosphate molecular sieve and its preparation and catalytic application in MTO

A silicoaluminophosphate and molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low conversion rate of raw materials, selectivity of low-carbon olefins and low life, and achieve selectivity High, good catalytic performance, the effect of improving the conversion rate

Active Publication Date: 2008-09-10
YANKUANG ENERGY R&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But these catalysts are used in the reaction of methanol to low-carbon olefins, the conversion rate of raw materials is not high, the selectivity to low-carbon olefins and the service life are low

Method used

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  • Cobalt modification silicoaluminophosphate molecular sieve and its preparation and catalytic application in MTO
  • Cobalt modification silicoaluminophosphate molecular sieve and its preparation and catalytic application in MTO
  • Cobalt modification silicoaluminophosphate molecular sieve and its preparation and catalytic application in MTO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Synthesis of Co-SAPO-34 Molecular Sieve 1

[0026] According to the ratio: 3.0TEA: 0.75SiO 2 :Al 2 o 3 : 2.0H 3 PO 4 : 0.02Co(NO 3 ) 2 : 60H 2 O Weigh the raw material. Mix a certain amount of pseudo-boehmite and a certain amount of water thoroughly, then add H 3 PO 4 , Co(NO 3 ) 2 , silica sol, TEA (triethylamine), fully stirred for a certain period of time until uniform. The prepared gel was transferred into a 200ml crystallization kettle, sealed and crystallized at 190°C for 72 hours. The solid product was taken out, washed repeatedly with deionized water until it became neutral, and placed in a drying oven at 110° C. to dry overnight to obtain Co-SAPO-34 molecular sieve product 1.

Embodiment 2

[0028] Synthesis of Co-SAPO-34 Molecular Sieve 2

[0029] According to the ratio: 3.0TEA: 0.75SiO 2 :Al 2 o 3 : 2.0H 3 PO 4 : 0.05Co(NO 3 ) 2 : 60H 2 O Weigh the raw material. Mix a certain amount of pseudo-boehmite and a certain amount of water thoroughly, then add H 3 PO 4 , Co(nO 3 ) 2 , silica sol, TEA, fully stirred for a certain period of time until uniform. The prepared gel was transferred into a 200ml crystallization kettle, sealed and crystallized at 190°C for 72 hours. The solid product was taken out, washed repeatedly with deionized water until it became neutral, and placed in a drying oven at 110° C. to dry overnight to obtain Co-SAPO-34 molecular sieve product 2.

Embodiment 3

[0031] Synthesis of Co-SAPO-34 Molecular Sieve 3

[0032] According to the ratio: 3.0TEA: 0.75SiO 2 :Al 2 o 3 : 2.0H 3 PO 4 : 0.10Co(NO 3 ) 2 : 60H 2 O Weigh the raw material. Mix a certain amount of pseudo-boehmite and a certain amount of water thoroughly, then add H 3 PO 4 , Co(NO 3 ) 2 , silica sol, TEA, fully stirred for a certain period of time until uniform. The prepared gel was transferred into a 200ml crystallization kettle, sealed and crystallized at 190°C for 72 hours. The solid product was taken out, washed repeatedly with deionized water until it became neutral, and placed in a drying oven at 110° C. to dry overnight to obtain Co-SAPO-34 molecular sieve product 3.

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Abstract

The invention relates to a Co-modified silicoaluminophosphate molecular sieve, a preparation method and catalytic application in MTO thereof. The structural formula of the molecular sieve is (0.2-5.0) R: (Si0.01-1 Al0.5-1 P0.1-3):10- 400H2O: (0.01-0.5) Co. Compared with the prior art, the invention provides a Co-SAPO-34 molecular sieve, which is used as a catalyst and applied to prepare light olefins by using methanol, the transformation ratio of the methanol material achieves 100 percent. Due to the selectivity and service life of the light olefins, the Co-modified silicoaluminophosphate molecular sieve, the preparation method and the catalytic application in MTO of the invention is characterized by high selectivity (ethylene plus propylene), high yield rate and long service life of the catalytic agent.

Description

technical field [0001] The present invention relates to modified SAPO-34 molecular sieves. In particular, it relates to a cobalt-modified silicoaluminophosphate molecular sieve, its preparation method and its catalytic application in MTO. Background technique [0002] Low-carbon olefins, especially ethylene and propylene, as basic organic chemical raw materials, play a pivotal role in modern petroleum and chemical industries. The production methods of olefins can be divided into two categories: one is the petroleum route, and the other is the non-petroleum route. But for oil, the price continues to rise for a long time, the supply is unstable, and the resource reserves are limited. Therefore, it is not enough to increase the production of ethylene and propylene by relying on the traditional petroleum route. Methanol-to-Olefins (MTO for short) uses coal or natural gas as raw material to produce ethylene, propylene and other low-carbon olefins through methanol process, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C07C1/20C07C11/02
Inventor 孙启文王义君刘继森张宗森张利俊
Owner YANKUANG ENERGY R&D CO LTD
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