公开(公告)号：CA1028646A

公开(公告)日：1978-03-28

申请号：CA193028

申请日：1974-02-20

Applicant: PCR

Inventor： REED THOMAS M

IPC: C07C17/00 ,  C07C17/386 ,  C07C19/14 ,  C07C67/00 ,  C07C19/08

Abstract: 1412567 Bromochlorotrifluoroethane purification and azeotropes PCR Inc 18 Feb 1974 [26 April 1973] 7370/74 Heading C2C 1,1,2-Trifluoro - 1 - bromo - 2 - chloroethane and/or 1 - bromo - 1 - chloro - 2,2,2 - trifluoroethane, containing 1,2-dichlorohexafluorocyclobutane as impurity, are purified by adding an amount of acetone or tetrahydrofuran to form an azeotrope and distilling under refluxing conditions the resulting composition. Preferably at least 25 weight per cent of acetone or THF is used based on the total weight of said solvent and bromochlorotrifluoroethane. It is preferred to reduce the impurity to less than 0.01% by weight. Azeotropes comprising (a) 47 mole per cent of C 2 F 3 BrClH and 53 mole per cent of acetone and (b) 39 mole per cent C 2 F 3 BrClH and 61 mole per cent THF are novel compositions.

公开(公告)号：CH601148A5

公开(公告)日：1978-06-30

申请号：CH52174

申请日：1974-01-15

Applicant: PCR

Inventor： REED THOMAS M

IPC: C07C17/00 ,  C07C17/386 ,  C07C19/14 ,  C07C67/00 ,  C07C19/08 ,  C07C17/38

Abstract: 1412567 Bromochlorotrifluoroethane purification and azeotropes PCR Inc 18 Feb 1974 [26 April 1973] 7370/74 Heading C2C 1,1,2-Trifluoro - 1 - bromo - 2 - chloroethane and/or 1 - bromo - 1 - chloro - 2,2,2 - trifluoroethane, containing 1,2-dichlorohexafluorocyclobutane as impurity, are purified by adding an amount of acetone or tetrahydrofuran to form an azeotrope and distilling under refluxing conditions the resulting composition. Preferably at least 25 weight per cent of acetone or THF is used based on the total weight of said solvent and bromochlorotrifluoroethane. It is preferred to reduce the impurity to less than 0.01% by weight. Azeotropes comprising (a) 47 mole per cent of C 2 F 3 BrClH and 53 mole per cent of acetone and (b) 39 mole per cent C 2 F 3 BrClH and 61 mole per cent THF are novel compositions.