Purification of 1,1-dichloro-1-fluoroethane
AssigneeElf Atochem S.A.
InventorsYves Correia, Sylvain Perdrieux
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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.
Claims9
Process for the purification of a 1,1-dichloro-1-fluoroethane containing unsaturated impurities, comprising subjecting the product to be purified in the liquid phase, in the presence of oxygen, to an irradiation by short-wavelength UV rays between about 200 to about 360 nm, then washing with an alkaline and/or reducing solution, and drying.
Dependencies are inferred from the claim text.