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Catalyst, preparation method thereof and application thereof

A catalyst and co-catalyst technology, applied in the direction of dehydrohalogenation preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult regeneration and short service life of catalysts, and achieve extended service life, high selectivity, The effect of high reactivity

Active Publication Date: 2017-06-27
泉州宇极新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing catalysts in the background technology, especially for the short service life of the catalyst and the problem that it is not easy to regenerate, to provide a simple preparation process, high reaction performance, easy control of the regeneration process, and overall use Catalyst that can be used for large-scale production of trifluoroethylene with long life

Method used

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  • Catalyst, preparation method thereof and application thereof
  • Catalyst, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 (sample 1)

[0032] Weigh 200g of strip-shaped aluminum fluoride, add 10% nitric acid solution, boil and reflux for 6h, filter and wash with deionized water until pH = 7, dry at 80°C for 12h, and set aside;

[0033] Weigh 1.68g PdCl 2 Dissolve it with concentrated hydrochloric acid, add 100 g of deionized water and stir until the solution is clear to obtain the impregnation solution A. Weigh 1.17g Bi(NO 3 ). 5H 2 Dissolve O in 100 g of deionized water and stir until the solution is clear to obtain impregnation solution B. Mix the impregnating solution A and the impregnating solution B, add the pretreated strip-shaped aluminum fluoride and let it stand for 12 hours. After the impregnated catalyst was filtered, it was dried at 80°C for 24 hours, and then used.

Embodiment 2

[0034] Embodiment 2 (sample 2)

[0035] Weigh 200g of strip-shaped magnesium fluoride, add 10% nitric acid solution, boil and reflux for 12h, filter, wash with deionized water until pH = 7, dry at 80°C for 12h, and set aside;

[0036] Weigh 3.38g PdCl 2 Dissolve it with concentrated hydrochloric acid, add 100 g of deionized water and stir until the solution is clear to obtain the impregnation solution A. Weigh 5.03g Ni(NO 3 ). 6H 2 Dissolve O in 100 g of deionized water and stir until the solution is clear to obtain impregnation solution B. Mix the impregnating solution A and the impregnating solution B, add the pretreated strip-shaped magnesium fluoride and let stand for immersion for 12 hours. After the impregnated catalyst was filtered, it was dried at 80°C for 24 hours, and then used.

Embodiment 3

[0037] Embodiment 3 (sample 3)

[0038] Weigh 200g of strip-shaped calcium fluoride, add 5% nitric acid solution, boil and reflux for 18h, filter, wash with deionized water until pH=7, dry at 80°C for 24h, and set aside;

[0039] Weigh 10.36g PdCl 2 Dissolve it with concentrated hydrochloric acid, add 100 g of deionized water and stir until the solution is clear to obtain the impregnation solution A. Weigh 3.21g VCl 3Dissolve in 100 g of deionized water, stir until the solution is clear, and obtain impregnation solution B. Mix the impregnating solution A and the impregnating solution B, add the pretreated bar-shaped calcium fluoride and let stand for immersion for 24 hours. After the impregnated catalyst was filtered, it was dried at 80°C for 24 hours, and then used.

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PUM

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Abstract

The invention discloses a catalyst, a preparation method thereof and application thereof. The catalyst takes a porous metal fluoride or an oxyfluoride as a carrier, noble metal palladium or platinum is taken as a main active component, part of elements are added to serve as a promoter, and the catalyst is prepared by adopting a steeping method. The manufactured catalyst is used for gas-phase reaction after filtration, drying, roasting and activation. When used for reaction for gas phase preparation of trifluoroethylene, the catalyst has the advantages of being high in activity and selectivity and long in service life.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for preparing trifluoroethylene by gas phase reaction, its preparation method and its application. Background technique [0002] Trifluoroethylene is a fluorine-containing organic intermediate with a wide range of uses. It is an important raw material for the synthesis of hydrofluoroether, fluorobromooil and fluorine-containing polymers. It has applications in the fields of electronics, aviation, cleaning, and energy. [0003] At present, there are mainly two mature technological routes for the production of trifluoroethylene: one is to use HFC-134a as the starting material to generate trifluoroethylene through dehydrofluorination cracking reaction. This technological route is simple and the raw materials are easy to obtain, but the technological conditions are relatively Harsh, HF is produced in the reaction process, which requires high equipment, and the conversion rate of HFC-134a is l...

Claims

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Application Information

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IPC IPC(8): B01J27/25B01J27/138C07C17/25C07C21/18
Inventor 董利贾晓卿权恒道
Owner 泉州宇极新材料科技有限公司
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