Method for the water washing and recovery of methyl tertiary but

Details Method for the water washing and recovery of methyl tertiary but Method for the water washing and recovery of methyl tertiary but

1995-08-17

1997-04-01

Dees, Jos e G.

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

Organic compounds

Oxygen containing

568697, 568698, C07C 4105, C07C 4109

Patent

active

056168144

ABSTRACT:
An improved method of recovering methyl tertiary butyl ether from an etherification reaction product containing acidic by-products wherein the reaction product is charged to an MTBE distillation zone and fractionated therein to provide a lower boiling distillation fraction comprising isobutylene, methyl tertiary butyl ether, methanol and acidic by-products, wherein the lower boiling distillation fraction is counter-currently washed with alkaline water in a methanol extraction tower, and wherein an aqueous solution of an alkali is injected into the tower below the charge point for the wash water to substantially completely neutralize the acidic by-products and to provide an overhead extract substantially free from acidic by-products comprising isobutylene, methyl tertiary butyl ether and a minor amount of water, and a bottoms raffinate comprising methanol, water, alkaline by-products and a minor amount of methyl tertiary butyl ether.

REFERENCES:
patent: 5457243 (1995-10-01), Knifton et al.

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