Azeotropic or quasi-azeotropic composition of chloromethane

Patent metadata

Field	Value
Publication number	US-9650553-B2
Application number	US-201314655500-A
Country	US
Kind code	B2
Filing date	Dec 6, 2013
Priority date	Dec 26, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

Quasi-azeotropic or azeotropic compositions containing chloromethane and at least one or more compound(s) selected from 2,3,3,3-tetrafluoropropene, 3,3,3-trifluoropropene, 1,1,1,2-tetrafluoroethane, 1,1,1,2,2-pentafluoropropane, E/Z-1,1,3,3,3-pentafluoropropene, E/Z-1,2,3,3,3-pentafluoropropene, 1,1-difluoroethane and E-1,3,3,3-tetrafluoropropene. The composition may include either from 0.5 to 70 mol % of chloromethane and at least from 99.5 to 30 mol % of a compound selected from 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane, 3,3,3-trifluoropropene and 1,1,1,2-tetrafluoroethane, or from 55 to 95 mol % of chloromethane and at least from 45 to 5 mol % of one or more compound(s) selected from 1,1,1,2,2-pentafluoropropane, E/Z-1,1,3,3,3-pentafluoropropene, E/Z-1,2,3,3,3-pentafluoropropene and E-1,3,3,3-tetrafluoropropene.

First claim

The invention claimed is:

1. An azeotropic or quasi-azeotropic composition comprising chloromethane and at least one or more compound(s) selected from 2,3,3,3-tetrafluoropropene, 3,3,3-trifluoropropene, 1,1,1,2,2-pentafluoropropane, E/Z-1,1,3,3,3-pentafluoropropene, E/Z-1,2,3,3,3-pentafluoropropene, and 1,1-difluoroethane, wherein the composition comprises either
from 0.5 to 70 mol % of chloromethane and from 99.5 to 30 mol % of at least one or more compound(s) selected from 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane, and 3,3,3-trifluoropropene, or
from 55 to 95 mol % of chloromethane and from 45 to 5 mol % of at least one or more compound(s) selected from 1,1,1,2,2-pentafluoropropane, E/Z-1,1,3,3,3-pentafluoropropene, and E/Z-1,2,3,3,3-pentafluoropropene.

2. The composition as claimed in claim 1 , wherein the composition comprises either from 20 to 50 mol % of chloromethane and from 80 to 50 mol % of 2,3,3,3-tetrafluoropropene.

3. The composition as claimed in claim 1 , wherein the composition comprises from 35 to 65 mol % of chloromethane and from 65 to 35 mol % of 3,3,3-trifluoropropene.

4. The composition as claimed in claim 1 , wherein the composition comprises from 60 to 90 mol % of chloromethane and from 40 to 10 mol % of 1,1,1,2,2-pentafluoropropane.

5. The composition as claimed in claim 1 , wherein the composition comprises from 55 to 85 mol % of chloromethane and from 45 to 15 mol % of E/Z-1,1,3,3,3-pentafluoropropene.

6. The composition as claimed in claim 1 , wherein the composition comprises from 60 to 90 mol % of chloromethane and from 40 to 10 mol % of E/Z-1,2,3,3,3-pentafluoropropene.

7. The composition as claimed in claim 1 , wherein the composition comprises from 5 to 70 mol % of chloromethane and from 95 to 30 mol % of 1,1-difluoroethane.

8. The composition as claimed in claim 1 , wherein the composition further comprises hydrogen fluoride.

9. The composition as claimed in claim 8 , wherein the composition comprises from 20 to 45 mol % of HF, 5 to 20 mol % of chloromethane and 35 to 70 mol % of 2,3,3,3-tetrafluoropropene.

10. The composition as claimed in claim 8 , wherein the composition comprises from 15 to 45 mol % of HF, 35 to 60 mol % of chloromethane and 15 to 30 mol % of 1,1,1,2,2-pentafluoropropane.

11. The composition as claimed in claim 8 , wherein the composition comprises from 15 to 45 mol % of HF, 1 to 30 mol % of chloromethane and 30 to 85 mol % of 1,1-difluoroethane.

12. An azeotropic or quasi-azeotropic composition comprising from 15 to 40 mol % of HF, 40 to 70 mol % of chloromethane and 10 to 30 mol % of E/Z-1,3,3,3-tetrafluoropropene.

13. The composition as claimed in claim 1 , wherein the composition has a boiling point between from −40° C. to 70° C. and a pressure of between 1 and 15 bar.

14. The composition as claimed in claim 1 , wherein the composition consists essentially of either
from 0.5 to 70 mol % of chloromethane and from 99.5 to 30 mol % of a at least one or more compound(s) selected from 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane, and 3,3,3-trifluoropropene, or
from 55 to 95 mol % of chloromethane and from 45 to 5 mol % of at least one or more compound(s) selected from 1,1,1,2,2-pentafluoropropane, E/Z-1,1,3,3,3-pentafluoropropene, and E/Z-1,2,3,3,3-pentafluoropropene.

15. The composition as claimed in claim 1 , wherein the composition consists of either
from 0.5 to 70 mol % of chloromethane and from 99.5 to 30 mol % of a at least one or more compound(s) selected from 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane, and 3,3,3-trifluoropropene, or
from 55 to 95 mol % of chloromethane and from 45 to 5 mol % of at least one or more compound(s) selected from 1,1,1,2,2-pentafluoropropane, E/Z-1,1,3,3,3-pentafluoropropene, and E/Z-1,2,3,3,3-pentafluoropropene.

Assignees

• Arkema France

Inventors

• Deur-Bert Dominique
• Wendlinger Laurent

Classifications

• C09K5/044 Primary

  comprising halogenated compounds · CPC title

• C09K5/045

  containing only fluorine as halogen · CPC title

• C09K2205/32

  The mixture being azeotropic · CPC title

• C09K5/04

  the change of state being from liquid to vapour or vice versa · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title