Nearly azeotropic compositions consisting of hydrogenated fluorocarbons, suitable as freezing mixture in conditioning plants, essentially consisting of: (A) from 38 to 53% by weight of R22; (B) from 34 to 56% by weight of R124 and/or R124A; (C) from 2 to 13.5% by weight of R600 and/or R600A.
A refrigerant composition for use as a direct replacement for R-12. The refrigerant composition comprises about 40 to 60 weight percent chlorodifluoromethane (R-22), about 30 to 50 weight percent 1-chloro-1,2,2,2-tetrafluoroethane (R-124), about 5 to 20 weight percent 1-chloro-1,1-difluoroethane (R-142b), and about 1 to 4 weight percent of a hydrocarbon component, such as isobutane (R-600a).
