Method for synthesizing trifluoroiodomethane and pentafluoroethyliodide meanwhile

Abstract

The invention relates to a method of synthesizing CF_3I and C2F5I simultaneously, which belongs to the filed of organic chemical synthesis. The method of synthesizing CF_3I and C2F5I simultaneously is characterized in that a alkali metal salt, a alkali earth metal salts or / and a copper salt are taken as a catalyst to be attached to a porous carrier; an oxygen or mixed gas of oxygen and an inert gas is pumped; a CHF3 and / or a HFC_125 are taken as a raw material; an iodine is taken as an iodinating agent; then iodination occurs in a reactor under high temperature to generate the C2F5I and the CF_3I. The porous carrier is a fluoride or an oxyfluoride. The raw material of the invention is nontoxic and is convenient to get; the catalyst does not react with a reaction medium and has good stability. The synthesis process is safe and suitable for technical production.

Description

technical field [0001] The invention is a method for simultaneously synthesizing trifluoroiodomethane and pentafluoroiodoethane, and relates to a method for synthesizing trifluoroiodomethane (HFC-23) or pentafluoroethane (HFC-125) with iodine and oxygen under the action of a catalyst. A method for simultaneously synthesizing trifluoroiodomethane and pentafluoroiodoethane in the gas phase. Background technique [0002] Trifluoroiodomethane (CF 3 I) and pentafluoroiodoethane (C 2 f 5 1) has very high industrial value, is used for fire extinguishing agent, refrigerant, has higher application value in the initial telomerization agent of perfluoroalkyl iodide and the synthesis of fluorine-containing fine chemicals such as fluorine-containing pharmaceutical intermediates simultaneously . [0003] The fire extinguishing performance of trifluoroiodomethane is equivalent to that of Halon 1301, and it is the same gas fire extinguishing agent as Halon 1301, leaving no trace after f...

AI Technical Summary

Problems solved by technology

However, this method has many defects: the price of the raw material silver trifluoroacetate is very high, which is not suitable for industrial production; this type of salt is very toxic; the reaction of the solid reactant is easily out of control when heated, which is very unsafe

But the reaction time is long, which is not conducive to industrial production

[0012] Sage Jean Marc (French patent 2794456) mentions the preparation of C under a certain amount of oxygen by using pentafluoroethane and iodine 2 f 5 I, the carrier adopts activated carbon, and there is also the problem that the catalyst carrier is easily oxidized or carbon deposited, which is not conducive to industrial production

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