Preparation method of hexafluoroethane

A technology of hexafluoroethane and pentafluoroethane, which is applied in the field of preparation of hexafluoroethane, can solve the problems of immature production technology, low output, high energy consumption, etc., and achieve the relief of market demand pressure, long catalyst life, and reaction The effect of low energy consumption

Inactive Publication Date: 2012-11-07
SHANDONG HUAAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing production technology for preparing R116 is not mature enough, the output is low, and the energy consumption is high

Method used

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  • Preparation method of hexafluoroethane

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Experimental program
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Effect test

Embodiment 1

[0021] The preparation method of hexafluoroethane:

[0022] (1) The pentafluoroethane by-product and the chlorine gas mixture are contacted and reacted in the photochemical tower;

[0023] (2) The product chloropentafluoroethane produced in step (1) and the mixed liquid of hydrogen fluoride are contacted and reacted in a reactor equipped with a catalyst, and the catalyst is antimony fluoride.

[0024] The by-product of pentafluoroethane in step (1) is pentafluorochloroethane with a mass fraction of 50% and pentafluoroethane with a mass fraction of 50%.

[0025] The reaction temperature in step (1) is 50°C, and the reaction pressure is 0.1Mpa.

[0026] The molar ratio of pentafluoroethane to chlorine in step (1) is 1:1.3, and the contact time is 30 seconds.

[0027] The reaction temperature in step (2) is 120°C, and the reaction pressure is 2.0Mpa.

[0028] The molar ratio of chloropentafluoroethane to hydrogen fluoride in step (2) is 1:1, and the contact time is 10 seconds....

Embodiment 2

[0033] The preparation method of hexafluoroethane:

[0034] (1) The pentafluoroethane by-product and the chlorine gas mixture are contacted and reacted in the photochemical tower;

[0035] (2) The product chloropentafluoroethane produced in step (1) and the mixed liquid of hydrogen fluoride are contacted and reacted in a reactor equipped with a catalyst, and the catalyst is antimony fluoride.

[0036] The by-product of pentafluoroethane in step (1) is pentafluorochloroethane with a mass fraction of 80% and pentafluoroethane with a mass fraction of 20%.

[0037] The reaction temperature in step (1) is 150°C, and the reaction pressure is 0Mpa.

[0038] The molar ratio of pentafluoroethane to chlorine in step (1) is 1:1.8, and the contact time is 300 seconds.

[0039] The reaction temperature in step (2) is 50°C, and the reaction pressure is 3.0Mpa.

[0040] The molar ratio of chloropentafluoroethane to hydrogen fluoride in step (2) is 1:2, and the contact time is 30 seconds. ...

Embodiment 3

[0045] The preparation method of hexafluoroethane:

[0046] (1) The pentafluoroethane by-product and the chlorine gas mixture are contacted and reacted in the photochemical tower;

[0047] (2) The product chloropentafluoroethane produced in step (1) and the mixed liquid of hydrogen fluoride are contacted and reacted in a reactor equipped with a catalyst, and the catalyst is antimony fluoride.

[0048] The by-product of pentafluoroethane in step (1) is pentafluorochloroethane with a mass fraction of 60% and pentafluoroethane with a mass fraction of 40%.

[0049] The reaction temperature in step (1) is 100°C, and the reaction pressure is 0.05Mpa.

[0050] The molar ratio of pentafluoroethane to chlorine in step (1) is 1:1.5, and the contact time is 100 seconds.

[0051] The reaction temperature in step (2) is 80°C, and the reaction pressure is 2.5Mpa.

[0052] The molar ratio of chloropentafluoroethane to hydrogen fluoride in step (2) is 1:1.2, and the contact time is 20 seco...

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Abstract

The invention relates to a preparation method of hexafluoroethane, belonging to the technical field of fluoride industry. The preparation method is characterized by comprising the following steps: 1, enabling a pentafluoroethane by-product to contact and react with mixed chlorine gas in a photochemical tower; and 2, enabling chloropentafluoroethane which is a product obtained in the step 1 to contact and react with mixed hydrogen fluoride liquid in a reactor containing a catalysis which is an antimonial fluoride. The preparation method is simple in process, high in product yield and is easy for large-scale industrial production, and meanwhile, the process has the advantages of little three waste pollution, easiness in reaction control, long service life of the catalyst, low reaction energy consumption and the like; moreover, the byproduct generated during the production process of pentafluoroethane can be effectively treated, the production cost is lowered, the energy consumption is reduced, the conversion rate of raw materials is high, and market demand on hexafluoroethane can be relieved at the same time.

Description

technical field [0001] The invention relates to a preparation method of hexafluoroethane, which belongs to the technical field of fluorine chemical industry. Background technique [0002] Hexafluoroethane is a very important fluorine chemical material. Hexafluoroethane (R116) is mainly used as insulating gas, plasma etchant, and high dielectric strength coolant. The existing production technology for preparing R116 is not mature enough, the output is low, and the energy consumption is high. In recent years, with the development of pentafluoroethane production technology, the production of hexafluoroethane by using its by-products (containing 50-80% pentafluorochloroethane and 20%-50% pentafluoroethane) as raw materials has gradually be valued. Contents of the invention [0003] According to the deficiencies of the prior art, the technical problem to be solved by the present invention is: to provide a preparation method of hexafluoroethane, which can effectively process b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/08C07C17/20C07C19/10C07C17/10
Inventor 明文勇段琦李男孟翔王通
Owner SHANDONG HUAAN NEW MATERIAL
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