EP0164954A2
Expired / Lapsed
EP
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Process for the preparation of 1-chloro-1,2,2,2-tetrafluorethane
Assignee: Imperial Chemical Industries Ltd
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Filing: 1985-05-29
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Granted: —
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Expires: 2005-05-29
Abstract
Abstract A method for the preparation of 1-chloro-1, 2, 2, 2,- tetrafluoroethane which comprises treating 1, 1-dichloro-1, 2, 2, 2-tetrafluoroethane, optionally in the form of an isomer mixture, with an alkali metal amalgam in an active hydrogen containing liquid medium which includes a solvent for the dichlorotetrafluoroethane.
Inventors
- 👤 Denis George Harold Ballard
- 👤 Jeffrey Farrar
- 👤 Dale Andrew Laidler
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 08:23
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/23
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
A method for the preparation of 1-chloro-1,2,2,2-tetrafluoroethane which comprises treating 1,1-dichloro-1,2,2,2-tetrafluorethane with an alkali metal amalgam in an active hydrogen containing liquid medium which includes a solvent for the dichlorotetrafluoroethane.
Claim 2
Independent Claim
30 words
A method for the preparation of 1-chloro-1,2,2,2-tetrafluoroethane which comprises treating 1,1-dichloro-1,2,2,2-tetrafluorethane with an alkali metal amalgam in an active hydrogen containing liquid medium which includes a solvent for the dichlorotetrafluoroethane.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the alkali metal amalgam is sodium amalgam.
Claim 4
Dependent Claim
16 words
A method according to claim 1 wherein the active hydrogen containing liquid medium is an alcohol.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein the active hydrogen containing liquid medium is an aqueous alcohol.
Claim 6
Dependent Claim
25 words
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.
Claim 7
Dependent Claim
24 words
A method according to claim 1 wherein the dichlorotetrafluoroethane is treated with the amalgam at a temperature in the range from -35° to 30°C.
Claim 8
Dependent Claim
21 words
A method according to claim 6 wherein the treatment is effected at a temperature in the range from 0 to 5°C.
Claim 9
Dependent Claim
19 words
A method according to claim 1 wherein the 1,1-dichloro-1,2,2,2-tetrafluoroethane is used in the form of a mixture with 1,2-dichloro-1,1,2,2-tetrafluoroethane.
References Cited (Backward Citations)
No citation records indexed.
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