Producing methyl ethers of branched monoolefins

Details Producing methyl ethers of branched monoolefins Producing methyl ethers of branched monoolefins

1982-10-14

1984-06-12

Trousof, Natalie

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

Organic compounds

Oxygen containing

203 38, 203 66, 203 70, 203DIG6, C07C 4106, C07C 4142, B01D 334

Patent

active

044543565

ABSTRACT:
Methanol is reacted with branched monoolefins such as isobutylene, or mixtures of hydrocarbons such as mixed C-4's from or in a refinery, in the presence of methanesulfonic acid. A column (10) operation is described wherein methanesulfonic acid (11) and methanol (12) are fed in countercurrent fashion to hydrocarbons (13). Crude product ether is removed as a liquid sidestream (25) above the feed of methanesulfonic acid (11), while hydrocarbons depleted of the reactive branched monoolefins (24) are removed overhead. The methanesulfonic acid suppresses the vapor pressure of methanol relative to product ether.

REFERENCES:
patent: 2720547 (1955-10-01), Wolff et al.
patent: 4232177 (1980-11-01), Smith
patent: 4262146 (1981-04-01), Childs
patent: 4292219 (1981-09-01), Lyons et al.

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