Continuous isobutylene-assisted aqueous extraction of methanol f

Details Continuous isobutylene-assisted aqueous extraction of methanol f Continuous isobutylene-assisted aqueous extraction of methanol f

1993-11-05

1995-03-07

Mars, Howard T.

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

Organic compounds

Oxygen containing

568698, 568697, C07C 4138, C07C 4134

Patent

active

053959825

ABSTRACT:
An impure methyl tertiary butyl ether product contaminated with isobutylene, methanol and water is purified by continuous counter-current contact with water and isobutylene in a counter-current contact extraction tower to provide an overhead extract comprising isobutylene, methyl tertiary butyl ether and water and a raffinate comprising methanol, water and a minor amount of methyl tertiary butyl ether, the overhead raffinate being separated in a methyl tertiary butyl ether purification distillation zone into a lighter distillation fraction comprising isobutylene and water and a heavier distillation fraction consisting essentially of methyl tertiary butyl ether, the lighter distillation fraction being decanted to remove water and to provide a distillate isobutylene fraction that is charged to a surge drum from which isobutylene is returned to the contact tower.

REFERENCES:
patent: 5243091 (1993-09-01), Kruse

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