Process for the preparation of 1,1,1-trifluoropropane

Patent metadata

Field	Value
Publication number	US-9249072-B2
Application number	US-201214233868-A
Country	US
Kind code	B2
Filing date	Jul 18, 2012
Priority date	Jul 19, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

The invention provides a process comprising contacting (1243zf) or (253fb) with hydrogen in the presence of a hydrogenation catalyst to produce a composition comprising 1,1,1-trifluoropropane (263fb).

First claim

The invention claimed is:

1. A process for the preparation of a composition comprising 1,1,1-trifluoropropane (263fb), comprising the step of:
reacting one of 3,3,3-trifluoropropene (1243zf) or 3-chloro-1,1,1-trifluoropropane (253fb) with hydrogen in the presence of a catalyst and in the presence of 263fb to produce 1,1,1-trifluoropropane (263fb), wherein 263fb is introduced into the reaction vessel or zone in which the reaction is conducted before the start of the reacting step.

2. A process according to claim 1 , wherein said process is conducted in the vapor phase.

3. A process according to claim 1 , said process further comprising the steps of:
(i) providing a mixture of 263fb and at least a portion of said 1243zf; and
(ii) contacting said mixture with said hydrogen.

4. A process according to claim 1 , wherein said reacting step is carried out at a temperature of from about −25 to about 300° C. and a pressure of from about 0 to about 40 bara.

5. A process according to claim 2 , wherein the reacting step is carried out at a temperature of from about 0 to about 300° C.

6. A process according to claim 5 , wherein the reacting is carried out at a temperature of from about 20 to about 200° C.

7. A process according to claim 6 , wherein the reacting is carried out at a temperature of from about 50 to about 150° C.

8. A process according to claim 1 comprising reaction of 1243zf with said hydrogen, wherein the molar ratio of hydrogen: 1243zf is from about 1:1 to about 40:1.

9. A process according to claim 1 , comprising the reaction of 253fb with said hydrogen, wherein the molar ratio of hydrogen: 253fb is from about 1:1 to about 40:1.

10. A process according to claim 1 wherein said catalyst comprises one of a supported or unsupported transition metal selected from Ni, Pd, Pt, Re, Rh, Ru and mixtures thereof.

11. A process according to claim 10 , wherein said catalyst is supported on at least one of alumina, titania, silica, zirconia or fluorides of the foregoing, calcium fluoride, carbon or barium sulphate.

12. A process according to claim 10 , wherein said catalyst is
(a) platinum supported on alumina Pt/Al2O3; or
(b) chlorotris(triphenylphosphine)rhodium(I).

13. A process according to claim 1 , wherein said process is carried out in the liquid phase in a solvent comprising 263fb and in which said catalyst is chlorotris(triphenylphosphine)rhodium(I) (Wilkinson's catalyst).

Assignees

• Sharratt Andrew P
• Mcguinness Claire E
• Hodgson Emma J
• Mexichem Amanco Holding Sa

Inventors

• Sharratt Andrew P
• Mcguinness Claire E
• Hodgson Emma J

Classifications

• C07C17/25

  by splitting-off hydrogen halides from halogenated hydrocarbons · CPC title

• C07C17/23

  by dehalogenation · CPC title

• C07C17/354 Primary

  by hydrogenation · CPC title

• C07C19/08

  containing fluorine · CPC title