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Catalyst as well as preparation method and application thereof

A technology of catalysts and fluorides, applied in chemical instruments and methods, physical/chemical process catalysts, preparation of halogenated hydrocarbons, etc., can solve the problems of high reaction temperature and low selectivity of target products, and achieve lower reaction temperature and less side effects Reaction occurs and the effect with high reproducibility

Active Publication Date: 2017-06-30
泉州宇极新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the deficiencies of the existing process conditions, especially the problems of high reaction temperature and low target product selectivity, and provides a catalyst with simple preparation process and high reaction performance, which can be used for large-scale synthesis of 1,1-dibromo- 1,2,2,2-Tetrafluoroethane

Method used

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  • Catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 (sample 1)

[0026] Weigh 300g of coconut shell charcoal, 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;

[0027] Weigh 17.3g FeCl 3 and 12.7g ZnCl 2 Dissolve with deionized water, stir until the solution is clear, add pretreated coconut shell charcoal and let stand for 12 hours. After the impregnated catalyst was filtered, it was dried at 80°C for 24 hours, and then used.

Embodiment 2

[0028] Embodiment 2 (sample 2)

[0029] Weigh 300g of 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;

[0030] Weigh 17.3g FeCl 3 and 12.7g ZnCl 2 Dissolve in deionized water, stir until the solution becomes clear, add pretreated aluminum fluoride and let stand for 12 hours. After the impregnated catalyst was filtered, it was dried at 80°C for 24 hours, and then used.

Embodiment 3

[0031] Embodiment 3 (sample 3)

[0032] Weigh 300g of magnesium 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 17.3g FeCl 3 and 12.7g ZnCl 2 Dissolve in deionized water, stir until the solution is clear, add pretreated magnesium fluoride and let stand for 12 hours. After the impregnated catalyst was filtered, it was dried at 80°C for 24 hours, and then used.

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Abstract

The invention discloses a catalyst as well as a preparation method and an application thereof and aims to solve the problems that high reaction temperature and lower target product selectivity during bromination synthesis of 1,1-dibromo-1,2,2,2-tetrafluoroethane from 1,1,1,2-tetrafluoroethane. The catalyst takes one or more of Fe, Al, Cu, Sn, Zn and P halides as active components, is loaded on activated carbon, porous metal fluoride or oxyfluoride with an impregnation method, is used for gaseous-phase synthesis of 1,1-dibromo-1,2,2,2-tetrafluoroethane after being dried and has the advantages of low reaction temperature, high target product selectivity and the like.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst, its preparation method and its application in gas phase reaction preparation of 1,1-dibromo-1,2,2,2-tetrafluoroethane. Background technique [0002] 1,3-Hexafluorobutadiene is an etching gas with excellent performance, and the market demand for etching processes in the semiconductor industry continues to grow. At this stage, there are two main methods for synthesizing 1,3-hexafluorobutadiene: one is to remove HBr from 1,2-dibromo-1,2,2-trifluoroethane to generate bromotrifluoroethylene, and then Complexes with metal zinc to form a trifluorovinyl metal complex, in Fe 3+ under the action of coupling; the other is through the complexation of 1,1-dibromo-1,2,2,2-tetrafluoroethane with metal zinc, in Fe 3+ Under the action of coupling synthesis. Wherein the second method has a good industrial application prospect due to its short reaction route and simple operation. [0003] At present, 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138B01J27/128B01J27/135C07C17/10C07C19/14
CPCB01J27/128B01J27/135B01J27/138C07C17/10C07C19/14
Inventor 董利胡儒柱陈朝晖
Owner 泉州宇极新材料科技有限公司
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