Chiller refrigerants

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 5/04 (2006.01)

Patent

CA 2507639

Refrigerant composition are disclosed which comprises: (a) pentafluoroethane, trifluoromethoxydifluoromethane or hexafluoro~cyclopropane, or a mixture of two or more thereof, in an amount of from 60 to 70% by weight based on the weight of the composition, (b) 1,1,1,2- or 1,1,2,2-tetrafluoroethane, trifluoromethoxypentafluoroethane, 1,1,1,2,3,3-heptafluoropropane or a mixture of two or more thereof, in an amount of from 26 to 36% by weight based on the weight of the composition and (c) an ethylenically unsaturated or saturated hydrocarbon, optionally containing one or more oxygen atoms, with a boiling point from -12~C to +10~C, or a mixture thereof, or a mixture of one or more said hydrocarbons with one or more other hydrocarbons, said mixture having a bubble point from -12~C to +10~C, in an amount from 1 % to 4% by weight based on the weight of the composition.

L'invention concerne une composition de fluide frigorigène contenant : (a) 60 à 70 % en poids de pentafluoroéthanne, de trifluorométhoxydifluorométhane, d'hexafluorocyclopropane ou d'un mélange de deux ou plusieurs de ces composés sur la base du poids de ladite composition, (b) 26 à 36 % en poids de 1,1,1,2- ou 1,1,2,2-tétrafluoroéthanne, de trifluorométhoxypentafluoroéthanne, de 1,1,1,2,3,3-heptafluoropropane ou d'un mélange de deux ou plusieurs de ces composés sur la base du poids de ladite composition et (c) 1 à 4 % en poids d'un hydrocarbure éthyléniquement insaturé ou saturé, contenant éventuellement un ou plusieurs atomes d'oxygène et présentant un point d'ébullition de -12 ·C à +10 ·C, ou d'un mélange d'hydrocarbures ou encore d'un mélange d'un ou plusieurs de ces hydrocarbures avec un ou plusieurs autres hydrocarbures, ledit mélange présentant un point de bulle de -12 ·C à +10 ·C, sur la base du poids de ladite composition.

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