Preparation of bis(fluoromethy)ether and difluoromethane

Details Preparation of bis(fluoromethy)ether and difluoromethane Preparation of bis(fluoromethy)ether and difluoromethane

1993-11-04

1994-09-06

Mars, Howard T.

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

Organic compounds

Oxygen containing

570142, C07L 4101, C07L 1700

Patent

active

053449983

ABSTRACT:
A process for the production of bis(fluoromethyl)ether by contacting formaldehyde with hydrogen fluoride in a reaction/distillation vessel. The reaction/distillation vessel is preferably a reaction/distillation column through which formaldehyde and hydrogen fluoride preferably flow in counter current.
The bis(fluoromethyl)ether may be converted to difluoromethane, preferably by heating the bis(fluoromethyl)ether to elevated temperature in the presence of a metal, metal oxide, metal fluoride or metal oxyfluoride catalyst.

REFERENCES:
patent: 3377394 (1968-04-01), Boudakian et al.
patent: 4143078 (1979-03-01), Gibbs et al.
patent: 5073236 (1991-12-01), Gelbein et al.
Weinmayr, Hydrogen Fluoride as a Condensing Agent, VI. Reactions of Fluoroolefins with Formaldehyde in . . . , The Journal of Organic Chemistry, vol. 28, No. 2, Feb., 1963, pp. 492-494.
West German Published Patent Application 1 025 856, Production of Bis-Methyl Chloride Ether.
Weinmayr, J. Org. Chem., vol. 28, pp. 492-494, 1963.

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