Method for the manufacture and purification of methyl tertiary b

Details Method for the manufacture and purification of methyl tertiary b Method for the manufacture and purification of methyl tertiary b

1995-08-08

1997-09-02

Ivy, C. Warren

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

Organic compounds

Oxygen containing

568698, 568699, C07C 4106

Patent

active

056634544

ABSTRACT:
Methanol and isobutylene are reacted to form a methyl tertiary butyl ether product stream containing contaminating quantities of dimethyl ether, methanol and isobutylene that is separated into a first fraction comprising isobutylene and methyl tertiary butyl ether and a second fraction comprising residual methyl tertiary butyl ether, methanol, dimethyl ether and water. The second fraction is separated into a first lower boiling distillation fraction comprising methyl tertiary butyl ether, methanol, isobutylene, dimethyl ether, and water and a first higher boiling distillation fraction comprising methanol and water. Dimethyl ether and isobutylene are recovered from the first lower boiling distillation fraction and charged to a second distillation column for separation into a second lower boiling distillation fraction consisting essentially of dimethyl ether and a second higher boiling distillation fraction comprising dimethyl ether and isobutylene.

REFERENCES:
patent: 5243091 (1993-09-01), Kruse et al.
patent: 5292964 (1994-03-01), Gupta et al.
patent: 5320051 (1994-06-01), Eason et al.
patent: 5354912 (1994-10-01), Hwan et al.

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