Azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF3I) and hexafluoropropene (HFP)

Patent metadata

Field	Value
Publication number	US-10647644-B2
Application number	US-201916571912-A
Country	US
Kind code	B2
Filing date	Sep 16, 2019
Priority date	Oct 15, 2018
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

The present disclosure provides azeotrope or azeotrope-like compositions including trifluoroiodomethane (CF3I) and hexafluoropropene (HFP), and a method of forming an azeotrope or azeotrope-like composition comprising the step of combining hexafluoropropene (HFP) and trifluoroiodomethane (CF3I) to form an azeotrope or azeotrope-like comprising hexafluoropropene (HFP) and trifluoroiodomethane (CF3I) having a boiling point of about −31.21° C.±0.30° C. at a pressure of about 14.21 psia±0.30 psia.

First claim

What is claimed is:

1. A composition comprising an azeotrope or azeotrope-like composition consisting essentially of effective amounts of hexafluoropropene (HFP) and trifluoroiodomethane (CF 3 I).

2. The composition of claim 1 , wherein the azeotrope or azeotrope-like composition has a boiling point of about −31.21° C.±0.30° C. at a pressure of about 14.21 psia±0.30 psia.

3. The composition of claim 1 , wherein the azeotrope or azeotrope-like composition consists essentially of from about 36 wt. % to about 94 wt. % hexafluoropropene (HFP) and from about 6 wt. % to about 64 wt. % trifluoroiodomethane (CF 3 I).

4. The composition of claim 1 , wherein the azeotrope or azeotrope-like composition consists essentially of from about 48 wt. % to about 85 wt. % hexafluoropropene (HFP) and from about 15 wt. % to about 52 wt. % trifluoroiodomethane (CF 3 I).

5. The composition of claim 1 , wherein the azeotrope or azeotrope-like composition consists essentially of from about 69 wt. % to about 70 wt. % hexafluoropropene (HFP) and from about 30 wt. % to about 31 wt. % trifluoroiodomethane (CF 3 I).

6. The composition of claim 1 , wherein the azeotrope or azeotrope-like composition consists essentially of about 69.39 wt. % hexafluoropropene (HFP) and about 30.61 wt. % trifluoroiodomethane (CF 3 I).

7. A composition comprising an azeotrope or azeotrope-like composition consisting essentially of hexafluoropropene (HFP) and trifluoroiodomethane (CF 3 I) and having a boiling point of about −31.21° C.±0.30° C. at a pressure of about 14.21 psia±0.30 psia.

8. The composition of claim 7 , wherein the azeotrope or azeotrope-like composition consists essentially of from about 36 wt. % to about 94 wt. % hexafluoropropene (HFP) and from about 6 wt. % to about 64 wt. % trifluoroiodomethane (CF 3 I).

9. The composition of claim 7 , wherein the azeotrope or azeotrope-like composition consists essentially of from about 48 wt. % to about 85 wt. % hexafluoropropene (HFP) and from about 15 wt. % to about 52 wt. % trifluoroiodomethane (CF 3 I).

10. The composition of claim 7 , wherein the azeotrope or azeotrope-like composition consists essentially of from about 69 wt. % to about 70 wt. % hexafluoropropene (HFP) and from about 30 wt. % to about 31 wt. % trifluoroiodomethane (CF 3 I).

11. The composition of claim 7 , wherein the azeotrope or azeotrope-like composition consists essentially of about 69.39 wt. % hexafluoropropene (HFP) and about 30.61 wt. % trifluoroiodomethane (CF 3 I).

12. The composition of claim 7 , wherein the azeotrope or azeotrope-like composition consists of from about 36 wt. % to about 94 wt. % hexafluoropropene (HFP) and from about 6 wt. % to about 64 wt. % trifluoroiodomethane (CF 3 I).

13. The composition of claim 7 , wherein the azeotrope or azeotrope-like composition consists of from about 48 wt. % to about 85 wt. % hexafluoropropene (HFP) and from about 15 wt. % to about 52 wt. % trifluoroiodomethane (CF 3 I).

14. The composition of claim 7 , wherein the azeotrope or azeotrope-like composition consists of about 69.39 wt. % hexafluoropropene (HFP) and about 30.61 wt. % trifluoroiodomethane (CF 3 I).

15. A method of forming an azeotrope or azeotrope-like composition comprising the step of combining hexafluoropropene (HFP) and trifluoroiodomethane (CF 3 I) to form an azeotrope or azeotrope-like composition consisting essentially of hexafluoropropene (HFP) and trifluoroiodomethane (CF 3 I) having a boiling point of about −31.21° C.±0.30° C. at a pressure of about 14.21 psia±0.30 psia.

16. The method of claim 15 , wherein the combining step comprises combining from about 36 wt. % to about 94 wt. % hexafluoropropene (HFP) and from about 6 wt. % to about 64 wt. % trifluoroiodomethane (CF 3 I).

17. The method of claim 15 , wherein the combining step comprises combining from about 48 wt. % to about 85 wt. % hexafluoropropene (HFP) and from about 15 wt. % to about 52 wt. % trifluoroiodomethane (CF 3 I).

18. The method of claim 15 , wherein the combining step comprises combining about 69.39 wt. % hexafluoropropene (HFP) and about 30.61 wt. % trifluoroiodomethane (CF 3 I).

19. A method of separating hexafluoropropene (HFP) and trifluoroiodomethane (CF 3 I) from a primary composition comprising hexafluoropropene (HFP), trifluoroiodomethane (CF 3 I) and at least one impurity, including the steps of:
forming, within the primary composition, a secondary composition which is an azeotrope or azeotrope-like composition consisting essentially of effective amounts of hexafluoropropene (HFP) and trifluoroiodomethane (CF 3 I) having a boiling point of about −31.21° C.±0.30° C. at a pressure of about 14.21 psia±0.30 psia; and
separating the secondary composition from the primary composition at least one impurity.

20. The method of claim 19 , wherein the forming step comprises forming, within the primary composition, a secondary composition which is an azeotrope or azeotrope-like composition consisting essentially of from about 36 wt. % to about 94 wt. % hexafluoropropene (HFP) and from about 6 wt. % to about 64 wt. % trifluoroiodomethane (CF 3 I) and having a boiling point of about −31.21° C.±0.30° C. at a pressure of about 14.21 psia±0.30 psia.

Assignees

• Honeywell Int Inc

Inventors

• Jungong Christian
• Merkel Daniel C
• Wang Haiyou
• Pham Hang T
• Hulse Ryan J

Classifications

• C07C21/18 Primary

  containing fluorine · CPC title

• C07C19/16

  and iodine · CPC title

• C07C17/386 Primary

  with auxiliary compounds · CPC title

• C08J2203/164

  Perhalogenated unsaturated hydrocarbons, e.g. F2C=CF2 · CPC title

• C08J2203/144

  Perhalogenated saturated hydrocarbons, e.g. F3C-CF3 · CPC title