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Synthetic method for metal ion containing silicon-phosphor-aluminium molecular shieve

A metal ion and synthesis method technology, applied in the direction of molecular sieve catalyst, molecular sieve and base exchange phosphate, chemical instruments and methods, etc., can solve the problems of low selectivity and low catalytic activity of ethylene, propylene and butene

Active Publication Date: 2008-02-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem of low catalytic activity and low selectivity of ethylene, propylene and butene when the silicon phosphorus aluminum molecular sieve prepared in the prior art is used in the process of producing light olefins from methanol or dimethyl ether. A new synthesis method of silicon phosphorus aluminum molecular sieves containing metal ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Synthesis of SAPO-34 Molecular Sieve

[0023] According to the formula 0.03HF:3.0Et 3 N:0.6SiO2 2 :Al 2 o 3 :P 2 o 5 :60H 2 O Weigh the raw material.

[0024] A certain amount of rAl 2 o 3 ·H2O, orthophosphoric acid aqueous solution, and hydrofluoric acid are fully stirred and mixed to form a uniform jelly. Keep stirring, add silica sol, triethylamine in turn, and finally add a certain amount of deionized water. After fully stirring, a crystallization mixed liquid is formed. Crystallize the crystallization mixed solution obtained above at 200°C for 48 hours, and the product is centrifuged to obtain a solid product, which is dried in an oven at 110°C overnight. The XRD test shows that the obtained product is SAPO-34 molecular sieve, and No other impurity peaks.

Embodiment 2

[0026] Synthesis of metal-containing SAPO-34 molecular sieves

[0027] According to the formula 0.03HF:3.0Et 3 N:0.6SiO2 2 :Al 2 o 3 :P 2 o 5 :60H 2 O:0.03Zn(NO 3 ) 2 Weigh the raw materials.

[0028] A certain amount of rAl2O 3 ·H2O, orthophosphoric acid aqueous solution, and hydrofluoric acid are fully stirred and mixed to form a uniform jelly. Keep stirring, add zinc nitrate aqueous solution, silica sol, triethylamine in sequence, and finally add a certain amount of deionized water. After fully stirring, a crystallization mixed liquid is formed. Crystallize the crystallization mixed solution obtained above at 200°C for 48 hours, and the product is centrifuged to obtain a solid product, which is dried in an oven at 110°C overnight. The XRD test shows that the obtained product is SAPO-34 molecular sieve, and There are no other impurity peaks, indicating that the metal ions have evenly entered the framework of the molecular sieve.

Embodiment 3

[0030] Preparation of SAPO-34 Molecular Sieve Catalyst

[0031] Sequentially roast the raw powders obtained in Example 1 and Example 2 at 600°C for 3.0 hours to remove the template agent, perform tableting and crushing respectively, and then sieve the parts with a particle size of 20 to 40 meshes. The serial numbers are CS-01, CS-02 Catalyst, pending evaluation.

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Abstract

The present invention relates to the synthesis process of metal ion containing Si-P-Al molecular sieve and aims at raising the catalytic activity and selectivity of Si-P-Al molecular sieve in preparing low-carbon olefin with methanol or dimethyl ether. The present invention synthesizes metal ion containing Si-P-Al molecular sieve by using triethylamiine and fluoride as composite template agent and through crystallizing with metal ion, Si source, P source and Al source at 100-250 deg.c for at least 0.5 hr. The present invention is used in industrial production of Si-P-Al molecular sieve.

Description

technical field [0001] The present invention relates to the synthesis method of silicon phosphorus aluminum molecular sieve containing metal ion, especially about a kind of synthesis method of the high-efficiency catalyst of low-carbon olefins (ethylene or propylene) by dimethyl ether or methanol as raw material, i.e. metal-containing SAPO- Synthesis of 34 molecular sieves. Background technique [0002] Ethylene and propylene play an important role in the modern chemical industry. Until now, most of ethylene and propylene come from petroleum processing. But for oil, there are problems of rising prices and unstable supply in the short term, and limited resource reserves in the long term, resulting in the problem of "oil crisis". Catalytic production of light olefins (MTO or DTO) from methanol or dimethyl ether as a raw material is the most promising new process to replace the petroleum route. The synthesis process of methanol and dimethyl ether is quite mature, and the sou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85C01B39/54
Inventor 刘红星谢在库陈庆龄陆贤张玉贤钱堃
Owner CHINA PETROLEUM & CHEM CORP