Claims
- 1. A method for preparing at least one halogenated compound selected from the group consisting of 1,1,1,4,4,4-hexafluoro-2,3-dichlorobutane, 1,1,1,4,4,4-hexafluoro-2- chloro-2-butene, 1,1,1,2,4,4,4-heptafluoro-2-butene and 1,1,1,2,2,4,4,4-octafluorobutane, which comprises reacting 1,1,2,3,4,4-hexachloro-1,3-butadiene with hydrogen fluoride in a gas phase in the presence of a fluorinating catalyst.
- 2. The method according to claim 1, wherein the catalyst is a fluoride and/or oxyfluoride of at least one metal selected from the group consisting of aluminum, chromium, manganese, nickel and cobalt.
- 3. The method according to claim 1, wherein the catalyst is prepared by fluorinating chromium oxide with hydrogen fluoride.
- 4. The method according to claim 1, wherein the catalyst is a metal fluoride or metal oxyfluoride prepared by adding an alkali to a solution of a metal salt to precipitate a metal oxide and then fluorinating the metal oxide with hydrogen fluoride.
- 5. The method according to claim 4, wherein said metal salt is selected from the group consisting of a chloride, a nitrate salt, and a sulfate salt.
- 6. The method according to claim 4, wherein said alkali is selected from the group consisting of ammonia, urea, and an alkaline metal hydroxide.
- 7. The method according to claim 4, wherein the metal is selected from the group consisting of aluminum, chromium, manganese, nickel, cobalt, and mixtures thereof.
- 8. The method according to claim 1, wherein the reaction is conducted at a temperature of from 250.degree. C. to 450.degree. C.
- 9. The method according to claim 1, wherein the reaction is conducted at a temperature of from 300.degree. C. to 400.degree. C.
- 10. The method according to claim 1, wherein the contact time of the fluorinating catalyst is from 1 second to 10 minutes.
- 11. The method according to claim 1, wherein the contact time of the fluorinating catalyst is from 10 to 30 seconds.
- 12. The method according to claim 1, wherein the reaction is conducted under a pressure of from 0.1 to 20 atmospheres.
- 13. The method according to claim 1, wherein the reaction is conducted under a pressure of from 1 to 10 atmospheres.
- 14. The method according to claim 1, wherein the amount of hydrogen fluoride is from 10 to 100 mols per one mol of 1,1,2,3,4,4-hexachloro-1,3-butadiene.
- 15. A method for preparing at least one halogenated compound from the group consisting of 1,1,1,4,4,4-hexafluoro-2,3-dichlorobutane, 1,1,1,4,4,4-hexafluoro-2-chloro-2-butene, 1,1,1,2,4,4,4-heptafluoro-2-butene and 1,1,1,2,2,4,4,4-octafluorobutane, which comprises reacting 1,1,2,3,4,4-hexachloro-1,3-butadiene with hydrogen fluoride in a gas phase in the presence of a fluorinating catalyst, wherein the catalyst is a fluoride and/or oxyfluoride of at least one metal selected from the group consisting of aluminum, chromium, manganese, nickel and cobalt, and wherein the reaction temperature is from 250.degree. C. to 450.degree. C.
- 16. The method according to claim 15, wherein the catalyst is prepared by fluorinating chromium oxide with hydrogen fluoride.
- 17. The method according to claim 15, wherein the reaction temperature is from 300.degree. C. to 400.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-003809 |
Jan 1992 |
JPX |
|
Parent Case Info
This application is a 371 of PCT/JP93/00027 filed Jan. 12, 1993.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP93/00027 |
1/12/1993 |
|
|
9/3/1993 |
9/3/1993 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO93/14051 |
7/22/1993 |
|
|
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Number |
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3965201 |
Minklei |
Jun 1976 |
|
4147733 |
Fiske et al. |
Apr 1979 |
|
5146019 |
Bielefeldt et al. |
Sep 1992 |
|
5233105 |
Schwarz et al. |
Aug 1993 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
1278429 |
Sep 1968 |
DEX |
0425887 |
Oct 1990 |
DEX |