Method for the preparation of methyl chloride from carbon tetrac

Details Method for the preparation of methyl chloride from carbon tetrac Method for the preparation of methyl chloride from carbon tetrac

1992-02-28

1993-03-23

Mars, Howard T.

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

Organic compounds

Halogen containing

423437, C07C 1716

Patent

active

051966182

ABSTRACT:
An improvement is proposed in the method for the preparation of methyl chloride from carbon tetrachloride and methyl alcohol by the reaction including the partial reactions of, first, the hydrolysis reaction of carbon tetrachloride with water to form hydrogen chloride and carbon dioxide and, second, the reaction of methyl alcohol with hydrogen chloride, each in the presence of a solid catalyst of zinc chloride supported on active carbon. The uncontrollable temperature increase when these reactions are performed on a single catalyst bed can be avoided by conducting the first partial reaction in a first reaction zone with a feed of carbon tetrachloride and water alone and the second partial reaction is conducted in a separate second reaction zone into which the gaseous mixture from the first zone and methyl alcohol are introduced. When carbon dioxide in the gaseous mixture from the first zone is removed therefrom prior to introduction of the mixture into the second reaction zone, the problems accompanying the separation of carbon dioxide from a gaseous mixture containing methyl chloride can be solved.

REFERENCES:
patent: 4423024 (1983-12-01), Wolford
patent: 4935565 (1990-06-01), Harley et al.

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