Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1998-06-18
2000-08-22
Peselev, Elli
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568699, C07C 4106
Patent
active
061075264
ABSTRACT:
A catalytic distillation process for producing high purity ethyl tertiary butyl ether that contains less than 0.6 weight percent ethanol, and preferably less than 0.07 weight percent ethanol, has been developed. The high purity ethyl tertiary butyl ether is withdrawn directly from a catalytic distillation column; no downstream processing is necessary to remove excess ethanol from the ether product. A stream containing largely normal butane is generated by a C.sub.4 distillation column along with a stream containing isobutane. The stream containing isobutane is dehydrogenated to form a stream containing isobutylene. Ethanol, the stream containing isobutylene, and the stream containing largely normal butane are introduced to an etherification zone containing a catalytic distillation column. The catalytic distillation column is operated under conditions which result in the reaction of the ethanol with the isobutylene to form ethyl tertiary butyl ether. Excess ethanol forms an azeotrope with the normal butane and is distilled with other hydrocarbons into an overhead stream. The ethyl tertiary butyl ether and no more than 0.6 weight percent ethanol are distilled into a bottoms stream and withdrawn directly from the catalytic distillation column.
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Cottrell Paul R.
Davis Scott P.
Frey Stanley J.
Krupa Steven L.
Maas Maryann
Molinaro Frank S.
Peselev Elli
Tolomei John G.
UOP LLC
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