Process for the preparation and fractionation of a mixture of di

Details Process for the preparation and fractionation of a mixture of di Process for the preparation and fractionation of a mixture of di

1997-06-23

1998-06-09

Geist, Gary

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

Organic compounds

Halogen containing

568698, C07C 1700, C07C 4100

Patent

active

057637121

ABSTRACT:
This invention relates to a process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane by extractive distillation with methanol as extractant. The mixture is prepared by reacting methanol with hydrogen chloride. The mixture is then distilled to remove water and is subsequently subjected to an extractive distillation with methanol as extractant, with chloromethane resulting as top product. In another distillation step, the remaining dimethyl ether is separated from the methanol.

REFERENCES:
patent: 3983180 (1976-09-01), Habata et al.

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