Azeotropic mixture having a low boiling point, and uses of...

C - Chemistry – Metallurgy – 09 – K

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C09K 5/04 (2006.01) C07C 19/08 (2006.01) C08J 9/14 (2006.01) C09K 3/30 (2006.01)

Patent

CA 2039329

PRECIS DE LA DIVULGATION: L'invention concerne un azéotrope à point d'ébullition minimum, utilisable comme fluide frigorigène en remplacement du trifluorobromométhane (Halon 1301) dans les systèmes de réfrigération industrielle très basse température à compression monoétagée. L'azéotrope selon l'invention, est un mélange de 1,1,1-trifluoroéthane (HFA 143a) et de propane (R 290). Au point d'ébullition normale (environ -53,4°C sous 1,013 bar), sa teneur en 1,1,1-trifluoroéthane est d'environ 70,6% en masse et celle de propane de 29,4%. Cet azéotrope peut également être utilisé comme propulseur d'aérosols ou comme agent d'expansion des mousses plastiques.

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