Compositions – Vaporization – or expansion – refrigeration or heat or energy... – With lubricants – or warning – stabilizing or anti-corrosion...
Patent
1992-05-08
1995-01-10
Willis, Jr., Prince
Compositions
Vaporization, or expansion, refrigeration or heat or energy...
With lubricants, or warning, stabilizing or anti-corrosion...
252 52R, 252 52A, 570116, C09K 500
Patent
active
053804490
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.
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Chen Ruth H. H.
Harris Kenneth
Thomas Raymond H. P.
Allied-Signal Inc.
Brown Melanie L.
Friedenson Jay P.
Harding Karen A.
Silberman James M.
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