Process for the separation of 1,1-dichloro-1-fluoroethane and 1,

Details Process for the separation of 1,1-dichloro-1-fluoroethane and 1, Process for the separation of 1,1-dichloro-1-fluoroethane and 1,

1989-05-04

1990-08-21

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

203 74, 203 81, 203 98, 570164, 570178, B01D 338, C07C 1738

Patent

active

049503642

ABSTRACT:
1,1-Dichloro-1-fluroethane and 1,1,1,3,3-pentafluorobutane are separated from their liquid mixtures, such as liquid mixtures resulting from the hydrofluorination of 1,1,1-trichloroethane or vinylidene chloride. 1,1-Dichloro-1-fluoroethane and 1,1,1,3,3-pentafluorobutane are completely separated by distillation, by adding to the mixture thereof a liquid containing at least about 3 moles of hydrogen fluoride per mole of 1,1-dichloro-1-fluoroethane in the mixture subject to separation.

REFERENCES:
patent: 2146354 (1939-02-01), Scherer
patent: 2450414 (1948-10-01), Benning
patent: 2549609 (1951-04-01), Johnson
patent: 3689374 (1972-09-01), Hanson
patent: 3833676 (1974-09-01), Ukaji et al.

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