The Dow Chemical Company

Joseph F Repman

Thomas E Morris

Tarver G Snedecor, Jr

Thomas F Hill, Jr

A process comprising contacting a solvent, magnesium hydroxide, and a halogenated hydrocarbon at a pressure sufficient to keep the solvent and the halogenated hydrocarbon under liquid conditions, and a temperature greater than 150.degree. C. under conditions suitable to dehydrohalogenate the halogenated hydrocarbon, and recovering the dehydrohalogenated product.

Dehydrohalogenation using magnesium hydroxide

A method to purify impure gaseous hydrogen chloride containing an unsaturated chlorinated hydrocarbon contaminant in an amount less than that necessary to inhibit purification, comprising exposing the impure hydrogen chloride to an ultraviolet light source in the presence of gaseous chloride for a sufficient time for the gaseous chloride to react with organic impurities in the hydrogen chloride to form heavier organic compounds and thereafter separating the heavier compounds from the hydrogen chloride.

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Angleton, TX, United States of America

Joseph F Repman