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US 5,344,945 AGranted
Process for the production of epichlorohydrin
AssigneeSolvay (Societe Anonyme)
InventorFrans Grunchard
Life of this patent
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Abstract
Process for the production of epichlorohydrin in which the chloroaliphatic impurities formed at the hypochlorination of allyl chloride to dichloropropanols are removed from the crude aqueous solution of dichloropropanols before dehydrochlorination, by extraction with a recycled organic solvent which is rich in 1,2,3-trichloropropane.
Claims6
A process for the production of epichlorohydrin starting from alyl chloride, to form a crude aqueous solution of dichloropropanols,
- a purification stage of the crude aqueous solution of dichloropropanols to remove chlorinated organic impurities by extraction by means of a recycled organic extraction solvent which is rich in 1,2,3-trichloropropane, said organic extraction solvent recycled from a distillation stage recovering and purifying 1,2,3-trichloropropane by-products produced during said pypochlorination stage in order to form a purified aqueous solution of dichloropropanols, and
- a dehydrochlorination stage of the purified solution of dichloropropanols to produce epichlorohydrin.
Dependencies are inferred from the claim text.