Method for etherifications

Details Method for etherifications Method for etherifications

1983-09-07

1985-03-12

Mars, Howard T.

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

Organic compounds

Oxygen containing

203DIG6, C07C 4105

Patent

active

045046875

ABSTRACT:
A method for producing tertiary ethers from C.sub.4 or C.sub.5 streams containing isobutene and isoamylene respectively in a process wherein a acidic cation exchange resin is used as the catalyst and as a distillation structure in a distillation reactor column, wherein the improvement is the operation of the catalytic distillation in two zones at different pressures, the first zone containing the catalyst packing and operated a higher pressure in the range of 100 to 200 psig in the case of C.sub.4 's and 15 to 100 psig in the case of C.sub.5 's which favors the etherification reaction and the second zone being a distillation operated at a lower pressure in the range of 0 to 100 psig in the case of C.sub.4 's and 0 to 15 psig in the case of C.sub.5 's wherein a first overhead from the first zone is fractionated to remove a portion of the unreacted alcohol from the first overhead and to return a condensed portion containing said alcohol to the first zone and to produce a second overhead having less alcohol than said first overhead.

REFERENCES:
patent: 2081322 (1937-05-01), Carney
patent: 2707165 (1955-04-01), McLean et al.
patent: 3241926 (1966-03-01), Parker et al.
patent: 4232177 (1980-11-01), Smith
patent: 4307254 (1981-12-01), Smith
patent: 4336407 (1982-06-01), Smith

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