Patent · US Expired

Process for the production of 1,1,1-trifluoro-2,2-dichloroethane

US4145368A · kind A · utility

14Cited by
3References
21Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 20, 1977
Grant dateMar 20, 1979
Priority date—
Expiry dateOct 20, 1997

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C17/23
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

1,1,1,-Trifluoro-2-chloroethane (fluorocarbon 133a) is chlorinated with Cl.sub.2 and product 1,1,1-trifluoro-2,2-dichloroethane (fluorocarbon 123) is recovered from the reaction mixture, as is overchlorinated byproduct 1,1,1-trifluoro-2,2,2-trichloroethane (fluorocarbon 113a). Fluorocarbon 113a is then reacted in the vapor phase with fluorocarbon 133a in the presence of a catalyst to produce more fluorocarbon 123. Preferred catalysts are activated carbon and especially chromium oxides and oxyfluorides. The product is useful in aerosol, refrigerant and foaming applications, and as an intermediate to other chlorofluoroethanes such as 1,1,1,2-tetrafluoro-1-chloroethane (fluorocarbon 124).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.