Combined dehydrogenation etherification process

Details Combined dehydrogenation etherification process Combined dehydrogenation etherification process

1988-10-26

1990-03-06

Mars, Howard T.

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

Organic compounds

Oxygen containing

568699, 585315, C07C 4106

Patent

active

049067885

ABSTRACT:
A combined process for the dehydrogenation of C.sub.4 -C.sub.5 paraffins in a first zone and the etherification of olefins in a second zone improves efficiency by directly charging all but the lightest components of the dehydrogenation zone effluent to the etherification zone. This process is particularly suited for the production of gasoline boiling range ethers where an isoparaffin is dehydrogenated in a first zone to produce isoolefins. After separation of hydrogen and methane, the dehydrogenation zone effluent is charged along with methanol to an etherification zone for the production of MTBE. The etherification zone effluent is separated into at least three component streams comprising light ends, isoparaffins, and the ether product. Isoparaffins, separated from the etherification zone effluent, are recycled and combined with the feed to dehydrogenation zone. The particular arrangement of this invention uses an etherification zone for the production of MTBE and a single fractionation column to yield an overhead stream of light ends, a sidecut stream of recycle isoparaffins and methanol, and a bottoms product stream of MTBE.

REFERENCES:
patent: 4219678 (1980-08-01), Obenaus et al.
patent: 4447653 (1984-05-01), Vora
patent: 4465870 (1984-08-01), Herskovitz

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