Processes for producing trifluoroiodomethane and trifluoroacetyl iodide

Patent metadata

Field	Value
Publication number	US-2022396536-A1
Application number	US-202217889496-A
Country	US
Kind code	A1
Filing date	Aug 17, 2022
Priority date	Aug 24, 2018
Publication date	Dec 15, 2022
Grant date	—

Abstract

The present disclosure provides a process for producing trifluoroiodomethane, the process comprising providing a reactant stream comprising hydrogen iodide and at least one trifluoroacetyl halide selected from the group consisting of trifluoroacetyl chloride, trifluoroacetyl fluoride, trifluoroacetyl bromide, and combinations thereof, reacting the reactant stream in the presence of a first catalyst at a first reaction temperature from about 25° C. to about 400° C. to produce an intermediate product stream comprising trifluoroacetyl iodide, and reacting the intermediate product stream in the presence of a second catalyst at a second reaction temperature from about 200° C. to about 600° C. to produce a final product stream comprising the trifluoroiodomethane.

First claim

1 - 12 . (canceled)

13 . A gas-phase process for producing trifluoroiodomethane, comprising:
providing a reactant stream comprising trifluoroacetyl iodide; and reacting the reactant stream in the presence of a catalyst at a reaction temperature from about 200° C. to about 600° C. to produce a product stream comprising the trifluoroiodomethane.

14 . The method of claim 13 , wherein in the step of reacting the reactant stream, the reaction temperature is from about 250° C. to about 500° C.

15 . The method of claim 13 , wherein in the step of reacting the reactant stream, the reaction temperature is from about 300° C. to about 400° C.

16 . The method of claim 13 , wherein in the step of reacting the reactant stream, the reaction temperature is from about 300° C. to about 350° C.

17 . The method of claim 13 , wherein in the step of reacting the reactant stream, the reactant stream may be in contact with the catalyst for a contact time from about 0.1 seconds to about 300 seconds.

18 . The method of claim 13 , wherein in the step of reacting the reactant stream, the reactant stream may be in contact with the catalyst for a contact time from about 1 seconds to about 60 seconds.

19 . The method of claim 13 , wherein in the step of reacting the reactant stream, the reactant stream may be in contact with the catalyst for a contact time from about 2 seconds to about 50 seconds.

20 . The method of claim 13 , wherein in the step of reacting the reactant stream, the reactant stream may be in contact with the catalyst for a contact time from about 3 seconds to about 30 seconds.

21 . The method of claim 13 , wherein in the step of reacting the reactant stream, the catalyst comprises stainless steel, nickel, nickel-chromium alloy, nickel-chromium-molybdenum alloy, nickel-copper alloy, copper, alumina, silicon carbide, platinum, palladium, rhenium, activated carbon, meso carbon or combinations thereof.

22 . The method of claim 13 , wherein in the step of reacting the reactant stream, the catalyst comprises activated carbon, about 0.1 wt. % to about 1 wt. % platinum on a support, about 0.1 wt. % to about 1 wt. % palladium on a support, about 0.1 wt. % to about 1 wt. % rhenium on a support, or combinations thereof.

23 . The method of claim 13 , wherein in the step of reacting the reactant stream, the catalyst comprises activated carbon or about 0.3 wt. % to about 0.7 wt. % palladium on a support.

24 . The method of claim 13 , wherein in the step of reacting the reactant stream, the catalyst comprises activated carbon.

25 . The method of claim 13 , wherein in the step of reacting the reactant stream, the catalyst consists of surfaces of a reactor in contact with the reactant stream.

26 . The method of claim 13 , wherein the step of reacting the reactant stream is at a pressure from about 5 psig (34 kPaG) to about 300 psig (2,068 kPaG).

27 . A composition comprising:
at least 99 wt. % of trifluoroiodomethane; less than 500 ppm hexafluoroethane; less than 500 ppm trifluoromethane; less than 100 ppm carbon monoxide; and less than 1 ppm hydrogen chloride.

28 . The composition of claim 27 , comprising:
at least 99.5 wt. % of trifluoroiodomethane; less than 250 ppm hexafluoroethane; less than 250 ppm trifluoromethane; less than 50 ppm carbon monoxide; and less than 0.5 ppm hydrogen chloride.

29 . The composition of claim 27 , comprising:
at least 99.7 wt. % of trifluoroiodomethane; less than 100 ppm hexafluoroethane; less than 100 ppm trifluoromethane; less than 20 ppm carbon monoxide; and less than 0.2 ppm hydrogen chloride.

30 . The composition of claim 27 , comprising:
at least 99.9 wt. % of trifluoroiodomethane; less than 100 ppm hexafluoroethane; less than 100 ppm trifluoromethane; less than 20 ppm carbon monoxide; and less than 0.2 ppm hydrogen chloride.

Assignees

• Honeywell Int Inc

Inventors

• Nair Haridasan K
• Matthies Glenn
• Singh Rajiv Ratna
• Yang Terris
• Wang Haiyou
• Hulse Ryan J
• Banavali Rajiv

Classifications

• B01J23/44

  Palladium · CPC title

• B01J23/42

  Platinum · CPC title

• B01J23/745

  Iron · CPC title

• C07C17/35

  by reactions not affecting the number of carbon or of halogen atoms in the reaction · CPC title

• C07C17/361

  by reactions involving a decrease in the number of carbon atoms · CPC title