Claims
- 1. A method for the selective preparation of 1-chloro-1,2,2,2-tetrafuoroethane which comprises treating a mixture of 1,1-dichloro-1,2,2,2-tetrafluoroethane and 1,2-dichloro-1,1,2,2-tetrafluoroethane at a temperature in the range form -35.degree. to 30.degree. C. with an alkali metal amalgam in an active hydrogen containing liquid medium which includes a solvent for the dichlorotetrafluoroethanes and separating the 1-chloro-1,2,2,2-tetrafluoroethane from unchanged 1,2-dichloro-1,1,2,2-tetrafluoroethane.
- 2. A method according to claim 1 wherein the alkali metal amalgam is sodium amalgam.
- 3. A method according to claim 1 wherein the active hydrogen containing liquid medium is an alcohol.
- 4. A method according to claim 1 wherein the active hydrogen containing liquid medium is an aqueous alcohol.
- 5. A method according to claim 1 wherein the active hydrogen containing liquid medium is a mixture of water and an aprotic solvent for the dichlorotetrafluoroethane.
- 6. A method according to claim 1 wherein the treatment is effected at a temperature in the range from 0.degree. to 5.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8415201 |
Jun 1984 |
GBX |
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Parent Case Info
This is a continuation of application Ser. No. 741,743, filed June 6, 1985 which was abandoned upon the filing hereof.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
2920112 |
Larsen |
Jan 1960 |
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4319060 |
Cunningham et al. |
Mar 1982 |
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Foreign Referenced Citations (3)
Number |
Date |
Country |
1453510 |
Aug 1966 |
FRX |
55306 |
Apr 1983 |
JPX |
681067 |
Oct 1952 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
741743 |
Jun 1985 |
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