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1,1,1,3,3,3-hexafluoropropane production method

A production method, the technology of hexafluoropropane, which is applied in the production field of 1,1,1,3,3,3-hexafluoropropane, can solve the problems of long reaction time and low reaction yield, and achieve excellent product yield Effect

Inactive Publication Date: 2015-07-29
上海汇友精密化学品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In summary, in the preparation method of 1,1,1,3,3,3-hexafluoropropane, the ubiquitous reaction time is long, the problem of low reaction yield

Method used

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  • 1,1,1,3,3,3-hexafluoropropane production method

Examples

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preparation Embodiment 1

[0016] According to the formula ratio in the following table, the catalyst and 1,1,1,3,3,3-hexachloropropane are added to the reaction kettle at the same time, the oxygen in the kettle is replaced with nitrogen, and then hydrogen fluoride is introduced to carry out the substitution reaction. The reaction temperature is 120°C , normal pressure (101325Pa) environment, the reaction time is 24 to 30 hours, and the crude product after the reaction is distilled under reduced pressure to obtain 1,1,1,3,3,3-hexafluoropropane.

[0017] Table 1 comparative example 1-2 and the raw material proportioning of the embodiment of the present invention 1

[0018]

preparation Embodiment 2

[0025] According to the formula ratio in the following table, the catalyst and 1,1,1,3,3,3-hexachloropropane are added to the reaction kettle at the same time, the oxygen in the kettle is replaced with nitrogen, and then hydrogen fluoride is introduced to carry out the substitution reaction. The reaction temperature is 150°C , the pressure is 20kpa, and the reaction time is 15-18 hours. After the reaction, the crude product is distilled under reduced pressure to obtain 1,1,1,3,3,3-hexafluoropropane.

[0026] Table 3 Raw Material Proportions of Examples 1-7 of the present invention

[0027]

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Abstract

The present invention provides a 1,1,1,3,3,3-hexafluoropropane production method, which comprises carrying out a reaction of 1,1,1,3,3,3-hexachloropropane and hydrofluoric acid under the effect of a catalyst to prepare the 1,1,1,3,3,3-hexafluoropropane, wherein the catalyst contains antimony pentafluoride and tin tetrafluoride. With the preparation method of the present invention, the 1,1,1,3,3,3-hexachloropropane conversion rate can be improved, and the prepared 1,1,1,3,3,3-hexafluoropropane of the present invention can be used as the refrigerant and the fire extinguishing agent.

Description

technical field [0001] The invention relates to a production method of 1,1,1,3,3,3-hexafluoropropane. Background technique [0002] There are many reports on the synthesis methods of 1,1,1,3,3,3-hexafluoropropane at home and abroad. The synthesis method of vinylidene chloride and carbon tetrachloride, and then the method of reacting the generated product with hydrogen fluoride is one of the routes. one. [0003] The synthesis method of 1,1,1,3,3,3-hexafluoropropane is prepared by reacting 1,1,1,3,3,3-hexachloropropane and hydrogen fluoride under the action of a catalyst. There are also many reports on catalysts for the synthesis of 1,1,1,3,3,3-hexafluoropropane, which are listed below: According to the report of the document React. Free radical reactivity is very low, vinylidene fluoride and CXCL3 (X=H, CL, COOEt, CH, CCL3) are initiated with organic peroxides, or with copper, iron salts and carbonyls (CLe(CO)5) Redox system catalysis, such initiators and catalysts not on...

Claims

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Application Information

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IPC IPC(8): C07C19/08C07C17/10
Inventor 贾颂今朱小兵刘鸣莉
Owner 上海汇友精密化学品有限公司
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