C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 5/04 (2006.01)
Patent
CA 2564148
The present invention relates to compositions for use in refrigeration and air conditioning systems comprising 1,1,1,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl)-3-pentanone and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, 1,1,1,2,2-pentafluoro-2- [(pentafluoroethyl)thio]ethane or mixtures thereof, and which are also useful in systems employing a centrifugal compressor. The compositions of the present invention may be azeotropic or near azeotropic and are useful in processes for producing refrigeration or heat or as heat transfer fluids.
La présente invention concerne des compositions utilisables dans des systèmes de réfrigération ou de conditionnement d'air. Les compositions comprennent 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluorométhyl)-3-pentanone et au moins un chlorocarbone, alcool, cétone, éther, ester, N-(difluorométhyl)-N,N-diméthylamine, 1,1,1,2,2-pentafluoro-2-[(pentafluoroéthyl)thio]éthane, ou leurs mélanges; et sont également utiles dans des systèmes employant un compresseur centrifuge. Les compositions de l'invention peuvent être azéotropiques ou quasi-azéotropiques et sont utiles dans des procédés de production de frigorigène ou de chaleur, ou comme fluides de transfert de chaleur.
Leck Thomas J.
Minor Barbara Haviland
E. I. Du Pont de Nemours And Company
Leck Thomas J.
Minor Barbara Haviland
Torys Llp
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