Abstract: The present invention provides a compositions for use in compression refrigeration and air-conditioning which substantially reduce the occurrence of the foregoing problem. The compositions comprise: (a) chlorine-containing refrigerant selected from the group consisting of hydrochlorocarbons, chlorofluorocarbons, and hydrochlorofluorocarbons, (b) hydrogen-contributing lubricant; and (c) composition comprising: (1) at least one phenol and (2) at least one aromatic epoxide or fluorinated alkyl epoxide wherein the composition (c) substantially reduces the removal of chlorine or chlorine and fluorine from the chlorine-containing refrigerant (a) and replacement of the halogen with hydrogen from the hydrogen-contributing lubricant (b).

Abstract: Trichlorofluoromethane refrigeration systems use mineral oil to lubricate the compressor. We have found that the use of 1,1-dichloro-2,2,2-trifluoroethane and mineral oil results in the formation of 1-chloro-2,2,2-trifluoroethane; in the absence of mineral oil, the use of 1,1-dichloro-2,2,2-trifluoroethane does not result in the formation of 1-chloro-2,2,2-trifluoroethane. We have found an additive which substantially reduces the formation of 1-chloro-2,2,2-trifluoroethane. Thus, the present invention provides a composition comprising: (a) 1,1-dichloro-2,2,2-trifluoroethane, (b) hydrogen-contributing lubricant: and (c) a composition comprising: (i) at least one phenol and (ii) at least one aromatic or fluorinated alkyl epoxide wherein the composition (c) substantially reduces the decomposition of 1,1-dichloro-2,2,2-trifluoroethane.