Azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF3I) and trifluoroacetyl chloride (CF3COCI)

Patent metadata

Field	Value
Publication number	US-11555136-B2
Application number	US-202117531476-A
Country	US
Kind code	B2
Filing date	Nov 19, 2021
Priority date	May 20, 2019
Publication date	Jan 17, 2023
Grant date	Jan 17, 2023

Abstract

The present disclosure provides azeotrope or azeotrope-like compositions including trifluoroiodomethane (CF 3 I) and trifluoroacetyl chloride (CF 3 COCl), and a method of forming an azeotrope or azeotrope-like composition comprising the step of combining trifluoroacetyl chloride (CF 3 COCl) and trifluoroiodomethane (CF 3 I) to form an azeotrope or azeotrope-like composition.

First claim

What is claimed is:

1. A method of forming an azeotrope or azeotrope-like composition comprising the step of combining trifluoroacetyl chloride (CF 3 COCl) and trifluoroiodomethane (CF 3 I) to form an azeotrope or azeotrope-like composition consisting essentially of trifluoroacetyl chloride (CF 3 COCl) and trifluoroiodomethane (CF 3 I) having a boiling point between about −46.0° C. and about 90.0° C. at a pressure of between about 4.9 psia and about 348 psia.

2. The method of claim 1 , wherein the combining step comprises combining from about 0.5 wt. % to about 99.0 wt. % trifluoroacetyl chloride (CF 3 COCl) and from about 1.0 wt. % to about 99.5 wt. % trifluoroiodomethane (CF 3 I).

3. The method of claim 1 , wherein the azeotrope or azeotrope-like composition consisting essentially of trifluoroacetyl chloride (CF 3 COCl) and trifluoroiodomethane (CF 3 I) has a boiling point of about −22.50° C.±0.30° C. at a pressure of about 14.41 psia±0.30 psia.

4. The method of claim 3 , wherein the combining step comprises combining from about 0.5 wt. % to about 25 wt. % trifluoroacetyl chloride (CF 3 COCl) and from about 75 wt. % to about 99.5 wt. % trifluoroiodomethane (CF 3 I).

5. The method of claim 3 , wherein the combining step comprises combining from about 2 wt. % to about 21 wt. % trifluoroacetyl chloride (CF 3 COCl) and from about 79 wt. % to about 98 wt. % trifluoroiodomethane (CF 3 I).

6. A method of forming an azeotrope or azeotrope-like composition comprising the step of combining trifluoroacetyl chloride (CF 3 COCl) and trifluoroiodomethane (CF 3 I) to form the azeotrope or azeotrope-like composition comprising effective amounts of trifluoroacetyl chloride (CF 3 COCl) and trifluoroiodomethane (CF 3 I).

7. The method of claim 6 , wherein the azeotrope or azeotrope-like composition has a boiling point of about −22.50° C.±0.30° C. at a pressure of about 14.41 psia±0.30 psia.

8. The method of claim 7 , wherein the combining step comprises combining from about 0.5 wt. % to about 25 wt. % trifluoroacetyl chloride (CF 3 COCl) and from about 75 wt. % to about 99.5 wt. % trifluoroiodomethane (CF 3 I).

9. The method of claim 7 , wherein the combining step comprises combining from about 2 wt. % to about 21 wt. % trifluoroacetyl chloride (CF 3 COCl) and from about 79 wt. % to about 98 wt. % trifluoroiodomethane (CF 3 I).

10. The method of claim 6 , wherein the azeotrope or azeotrope-like composition consists essentially of effective amounts of trifluoroacetyl chloride (CF 3 COCl) and trifluoroiodomethane (CF 3 I).

11. The method of claim 10 , wherein the azeotrope or azeotrope-like composition has a boiling point of about −22.50° C.±0.30° C. at a pressure of about 14.41 psia±0.30 psia.

12. The method of claim 11 , wherein the combining step comprises combining from about 0.5 wt. % to about 25 wt. % trifluoroacetyl chloride (CF 3 COCl) and from about 75 wt. % to about 99.5 wt. % trifluoroiodomethane (CF 3 I).

13. The method of claim 11 , wherein the combining step comprises combining from about 2 wt. % to about 21 wt. % trifluoroacetyl chloride (CF 3 COCl) and from about 79 wt. % to about 98 wt. % trifluoroiodomethane (CF 3 I).

14. The method of claim 6 , wherein the azeotrope or azeotrope-like composition consists of trifluoroacetyl chloride (CF 3 COCl) and trifluoroiodomethane (CF 3 I).

15. The method of claim 14 , wherein the azeotrope or azeotrope-like composition has a boiling point of about −22.50° C.±0.30° C. at a pressure of about 14.41 psia±0.30 psia.

16. The method of claim 15 , wherein the combining step comprises combining from about 0.5 wt. % to about 25 wt. % trifluoroacetyl chloride (CF 3 COCl) and from about 75 wt. % to about 99.5 wt. % trifluoroiodomethane (CF 3 I).

17. The method of claim 1 , further comprising the additional steps of:
separating the trifluoroiodomethane (CF 3 I) from the trifluoroacetyl chloride (CF 3 COCl); and
collecting a product comprising trifluoroiodomethane (CF 3 I).

18. The method of claim 1 , wherein the product consists essentially of trifluoroiodomethane (CF 3 I).

19. The method of claim 6 , further comprising the additional steps of:
separating the trifluoroiodomethane (CF 3 I) from the trifluoroacetyl chloride (CF 3 COCl); and
collecting a product comprising trifluoroiodomethane (CF 3 I).

20. The method of claim 6 , wherein the product consists essentially of trifluoroiodomethane (CF 3 I).

Assignees

• Honeywell Int Inc Intellectual Property Services Group
• Honeywell Int Inc

Inventors

• Pham Hang T
• Hulse Ryan J
• Singh Rajiv Ratna
• Nair Haridasan K

Classifications

• C07C53/48

  Halogenated acetyl halides · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title

• C07C45/82

  by distillation · CPC title

• C07C51/46

  by azeotropic distillation · CPC title

• B01D3/36 Primary

  Azeotropic distillation · CPC title