Purification of 1,1-dichloro-1-fluoroethane

Details Purification of 1,1-dichloro-1-fluoroethane Purification of 1,1-dichloro-1-fluoroethane

1993-11-05

1994-07-05

Evans, Joseph E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

20415811, 20415821, 570179, 570180, C07C 1738, C07C 1902, C07B 6300

Patent

active

053269187

ABSTRACT:
This invention relates to a process to remove the unsaturated impurities (in particular vinylidene chloride) present in a crude 1,1-dichloro-1-fluoroethane. This process comprises subjecting the product to be purified, in the liquid phase, in the presence of oxygen, to an irradiation by short wavelength UV rays (200 to 360 nm), then washing with an alkaline and/or reducing solution, and drying.

REFERENCES:
patent: 3218363 (1965-11-01), Haszeldine
patent: 3844914 (1974-10-01), Murchison
patent: 4948479 (1990-08-01), Brooks et al.
patent: 5105035 (1992-04-01), Wang et al.
patent: 5175380 (1992-12-01), Raab
patent: 5190626 (1993-03-01), Yates et al.
patent: 5198593 (1993-03-01), Kishita et al.
Chemical Abstract, vol. 93, No. 3, Jul. 21, 1980; Abstract No. 93:25891z, Vaclav Dekek et al., "Refining of technical 1,1,2-trifluorotrichloroethane".

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