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High specific surface area catalyst, preparation method and applications thereof

A technology with high specific surface area and specific surface area, which can be used in the preparation of dehydrohalogenation, chemical instruments and methods, catalysts for physical/chemical processes, etc. Effect

Inactive Publication Date: 2018-01-05
SINOCHEM MODERN ENVIRONMENTAL CHEM INDAL XI ANCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing preparation method can only obtain conventional zinc fluoride, which cannot be used as a catalyst in the fluorine-chlorine exchange reaction

Method used

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  • High specific surface area catalyst, preparation method and applications thereof
  • High specific surface area catalyst, preparation method and applications thereof
  • High specific surface area catalyst, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Take 39.54g Zn(CH 3 COO) 2 Dissolve in 500ml of methanol and stir to form a zinc solution. At room temperature, dissolve 10.0 g of anhydrous HF in HF-Et 2 O solution (12.5mol / L) was added to the above zinc solution, stirred vigorously, stopped stirring after 4 hours of reaction, and left to age for 4 hours. Use a rotary evaporator or a centrifuge to remove the volatile components in the product, and dry them in a vacuum oven to obtain zinc fluoride with a high specific surface area, which is recorded as ZnF 2 -1.

Embodiment 2

[0034] Take 51.08g Zn(MeO) 2 Dissolve in 500ml of methanol and stir to form a zinc solution. At room temperature, dissolve 20.0 g of anhydrous HF in HF-Et 2 O solution (12.5mol / L) was added to the above zinc solution, stirred vigorously, stopped stirring after 4 hours of reaction, and left to age for 4 hours. Use a rotary evaporator or a centrifuge to remove the volatile components in the product, and dry them in a vacuum oven to obtain zinc fluoride with a high specific surface area, which is recorded as ZnF 2 -2.

Embodiment 3

[0036] Take 52.72g Zn(CH 3 COO) 2 Dissolve in 500ml of methanol and stir to form a zinc solution. At room temperature, dissolve 10.0 g of anhydrous HF in HF-Et 2 O solution (12.5mol / L) was added to the above zinc solution, stirred vigorously, stopped stirring after 4 hours of reaction, and left to age for 4 hours. Use a rotary evaporator or a centrifuge to remove the volatile components in the product, and dry them in a vacuum oven to obtain zinc fluoride with a high specific surface area, which is recorded as ZnF 2 -3.

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Abstract

The present invention discloses a zinc fluoride-containing catalyst having high specific surface area and used for fluorine-chlorine exchange reactions, wherein the specific surface area is 80-180 m<2> / g, the pore volume is 0.15-0.50 cm<3>, and the pore size is 20-100 angstrom. According to the present invention, with the application of the catalyst in fluorine-chlorine exchange reactions, the catalyst has advantages of high conversion rate, high selectivity and low cost in the.

Description

technical field [0001] The invention relates to a metal fluoride used for catalytic reaction, in particular to a zinc fluoride catalyst with a high specific surface area. Background technique [0002] As a commonly used chemical raw material, zinc fluoride is widely used in ceramic glaze, electroplating, wood impregnating agent, brazing flux and analytical reagent, etc. For the preparation of zinc fluoride, the prior art mainly discloses two kinds: (1) using zinc carbonate and excess hot hydrofluoric acid as raw materials, white opaque zinc fluoride crystals are precipitated after the reaction, and then heated at 800 ° C and isolated from water. Anhydrous zinc fluoride can be obtained by heating under the condition of gas; (2) paste zinc oxide with water and gradually add excess hydrofluoric acid to precipitate white zinc fluoride crystals, and then evaporate and dry to obtain anhydrous zinc fluoride. [0003] The existing preparation method can only obtain conventional zin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/04B01J27/138C07C17/20C07C17/21C07C17/25C07C21/18C07C19/08C07C19/12
Inventor 杨洋王菲菲刘坤峰杨会娥齐芳田保华
Owner SINOCHEM MODERN ENVIRONMENTAL CHEM INDAL XI ANCO
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