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Fe-SAPO-34 molecular sieve with high skeleton ion content and preparation method thereof

A SAPO-34, fe-sapo-34 technology, applied in the field of molecular sieve preparation, can solve the problems of low heteroatom metal content, low catalytic activity, etc., achieve high metal content, high specific surface area, and expand the application range.

Active Publication Date: 2014-04-09
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is to provide a Fe-SAPO-34 molecular sieve with high skeleton iron content and its preparation method, which overcomes the low heteroatom metal content in the existing metal-modified SAPO-34 molecular sieve prepared and is used for MTO The problem of low catalytic activity during the reaction

Method used

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  • Fe-SAPO-34 molecular sieve with high skeleton ion content and preparation method thereof
  • Fe-SAPO-34 molecular sieve with high skeleton ion content and preparation method thereof
  • Fe-SAPO-34 molecular sieve with high skeleton ion content and preparation method thereof

Examples

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Embodiment 1

[0028] Add 10g of phosphoric acid and 10g of ethyl orthosilicate to 60ml of deionized water, stir for 15min, then add 11g of K 4 Fe(CN) 6 After continuing to stir for 60 minutes, 8 ml of diethylamine was added, and after 3 hours of reaction, the solution was transferred to a polytetrafluoro-lined autoclave, and crystallized under autogenous pressure of 160° C. for 72 hours. Then the sample was suction-filtered, washed with deionized water until neutral, and dried at 100°C for 6 hours. at 1°C min -1 The rate was programmed to increase the temperature to 550°C, keep the temperature for 5h, and remove the template agent.

Embodiment 2

[0030] Add 10g of phosphoric acid and 12.1g of ethyl orthosilicate to 60ml of deionized water, stir for 15min, then add 11g of K 4 Fe(CN) 6 After continuing to stir for 60 min, 10 ml of diethylamine was added, and after 3 hours of reaction, the solution was transferred to a polytetrafluoro-lined autoclave, and crystallized at an autogenous pressure of 160° C. for 72 hours. Then the sample was suction-filtered, washed with deionized water until neutral, and dried at 100°C for 6 hours. at 1°C·min -1 The rate was programmed to increase the temperature to 550°C, keep the temperature for 5h, and remove the template agent.

Embodiment 3

[0032] Add 8g of phosphoric acid and 12.1g of ethyl orthosilicate to 60ml of deionized water, stir for 15min, then add 11g of K 4 Fe(CN) 6 After continuing to stir for 60 min, 10 ml of diethylamine was added, and after 3 hours of reaction, the solution was transferred to a polytetrafluoro-lined autoclave, and crystallized under autogenous pressure of 180° C. for 72 hours. Then the sample was suction-filtered, washed with deionized water until neutral, and dried at 100°C for 6 hours. at 1°C·min -1 The temperature was programmed to 550°C, and the temperature was kept for 5 hours to remove the templating agent.

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Abstract

The invention provides a Fe-SAPO-34 molecular sieve with high skeleton ion content and a preparation method thereof, overcoming the problems that the prepared metal-modified SAPO-34 molecular sieve reported in literature is low in skeleton metal content and low in catalytic activity when being applied to reaction for preparing olefin by employing methanol. The invention provides a synthetic method of the Fe-SAPO-34 molecular sieve with high skeleton ion content. The method has the characteristics that the prepared SAPO-34 molecular sieve is high in skeleton ion atom content and good in catalytic activity, and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to a preparation method of molecular sieves, in particular to a Fe-SAPO-34 molecular sieve with high skeleton iron content and a preparation method thereof. Background technique [0002] SAPO-34 molecular sieve is a member of the SAPO-n series of molecular sieves first synthesized by UCC in 1982. It has a chabazite-like structure, has moderate acidity and good thermal and hydrothermal stability. The reaction to prepare light olefins has attracted much attention due to its excellent catalytic performance. It has a CHA structure and moderate acidity, and has been valued for its excellent catalytic performance in methanol-to-olefins (MTO) technology. CHA contains an 8-membered ring orifice to form an ellipsoidal cage and a three-dimensional channel structure. The catalytic performance of SAPO molecular sieves has a great relationship with its structure. In order to expand the applicable performance of SAPO molecular sieves, modifyi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/54B01J29/85
Inventor 徐俊青陈涛
Owner CHINA TIANCHEN ENG
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