Process for the purification of 1,1-dichloro-1-fluoroethane

Details Process for the purification of 1,1-dichloro-1-fluoroethane Process for the purification of 1,1-dichloro-1-fluoroethane

1993-01-12

1994-09-13

Manoharan, Virginia

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 34, 570178, B01D 334, C07C 1738

Patent

active

053465946

ABSTRACT:
A process for purification of crude, 1,1-dichloro-1-fluoroethane includes the steps of treating a mixture of crude, 1,1-dichloro-1-fluoroethane and hydrogen fluoride with chlorine in the presence of a Lewis acid, and distilling to recover purified 1,1-dichloro-1-fluoroethane, wherein hydrogen fluoride is present during the treatment with chlorine at a ratio of at least 5% by weight with respect to the mixture of crude, 1,1-dichloro-1-fluoroethane and hydrogen fluoride.

REFERENCES:
patent: 4028426 (1977-06-01), Mansell
patent: 4950816 (1990-08-01), Tung et al.
patent: 4962244 (1990-10-01), Elsheikh
patent: 5051538 (1991-09-01), Gumprecht
CA 88(18): 128 951V.
CA 114(1): 5801 U.
CA 116(7): 58736Z.

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