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Trifluoromethane resource utilization technology

A technology of trifluoromethane and chlorotrifluoromethane, which can be used in chemical recovery, organic chemistry, chemical instruments and methods, etc., and can solve problems such as increasing by-products

Active Publication Date: 2017-09-15
SHANDONG DONGYUE CHEM
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

That is, to achieve a certain conversion rate of trifluoromethane must be at the expense of increasing by-products, and the by-products themselves need to be processed, which is obviously impractical

Method used

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  • Trifluoromethane resource utilization technology

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Embodiment Construction

[0009] A method for resource utilization of trifluoromethane, comprising:

[0010] (1) Chlorination of trifluoromethane

[0011] Trifluoromethane and chlorine are mixed in proportion, and in the first reactor, under the action of a catalyst, trifluoromethane is chlorinated, converted into chlorotrifluoromethane, and the obtained chlorotrifluoromethane is separated as a raw material for the next step; unreacted After separation, trifluoromethane is recycled to the reactor to continue the reaction;

[0012] The catalyst is activated carbon;

[0013] (2) In the second reactor, one or more of chlorotrifluoromethane and ethylene or halogenated ethylene are telomerized under the action of a catalyst to generate halogenated trifluoropropane.

[0014] The halogenated trifluoropropane, the product of trifluoromethane conversion of the present invention, is used as a raw material for preparing pentafluoropropane or tetrafluoropropene.

[0015] According to the present invention, in s...

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Abstract

The invention discloses a trifluoromethane resource utilization technology. The trifluoromethane resource utilization technology is characterized in that trifluoromethane and chlorine are transformed to chlorotrifluoromethane under effect of a catalyst, the generated chlorotrifluoromethane and ethylene or halogenated ethene are subjected to a catalytic reaction to prepare halogenated trifluoropropane; and the halogenated trifluoropropane is taken as a raw material of perfluoropropane or tetrafluoropropene. The trifluoromethane resource utilization technology has the advantages of mild reaction condition and simple process, the obtained product can be taken as the raw material for preparing a green refrigerant foaming agent perfluoropropane or tetrafluoropropene, and has important economic value.

Description

technical field [0001] The invention relates to a process for resource utilization of trifluoromethane, in particular to a process for converting trifluoromethane into halogenated trifluoropropane, and belongs to the technical field of fluorine chemical industry. technical background [0002] Trifluoromethane (CHF 3 , HFC-23) is a by-product produced during the catalytic reaction of chloroform and HF to prepare difluoromonochloromethane (HCFC-22). -22 itself serves as the main source for the production of perfluoroolefins such as tetrafluoroethylene (TFE), so difluorochloromethane is excluded from the emission reduction entry under the Kyoto Protocol. Therefore trifluoromethane (CHF 3 ) emissions will continue for a long time, the annual CHF generated 3 as many as tens of thousands of tons. Trifluoromethane is a greenhouse gas (GWP value of about 14800, equivalent to CO 2 14800 times), and it has high stability and a long life in the atmosphere (about 264 years), so the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/10C07C17/10C07C17/275
CPCC07C17/10C07C17/275C07C19/10Y02P20/584
Inventor 韩春华王鑫丁晨都荣礼王伟孙森徐强谭啟晨
Owner SHANDONG DONGYUE CHEM
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