Vapor degreaser process employing trichlorotrifluoroethane and ethanol

摘要: Articles are cleaned in a vapor degreaser open to the atmosphere utilizing mixtures of 1,1,2-trichloro-1,2,2-trifluoroethane and ethanol as boil sump liquid; concentration exceeding its azeotropic value. The vapors liquid maintained nonflammable condition by: A. EMPLOYING A BOIL SUMP LIQUID CONSISTING ESSENTIALLY OF 35-85 WEIGHT PERCENT 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE AND 1565 ETHANOL; B. RINSE 88100 0-12 C. ADDING TO MAINTAIN THE VOLUME SYSTEM MAKE-UP MIXTURE 90-97 1,1,2-TRICHLORO-1,2,2-TRIFLUORETHANE 3-10 ETHANOL IN SUCH AMOUNT THAT IS AT LEAST CALCULATED FROM EQUATION