Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2007-09-18
2010-11-02
Keys, Rosalynd (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C422S198000
Reexamination Certificate
active
07825282
ABSTRACT:
A process for the conversion of tertiary butyl alcohol to ethyl tertiary butyl ether, including: dehydrating tertiary butyl alcohol to form a product stream comprising isobutylene and water; separating the product stream to form an isobutylene-rich fraction and a water-rich fraction; separating the water-rich fraction to recover a hydrocarbon fraction and a water fraction having less than 1 ppm hydrocarbon content; reacting isobutylene in the isobutylene-rich fraction with ethanol to form a reaction product comprising ethyl tertiary butyl ether; separating the reaction product to recover unreacted ethanol and an ethyl tertiary butyl ether stream; and recycling at least a portion of the unreacted ethanol to the reacting; wherein the ethyl tertiary butyl ether stream comprises at least 99 weight percent ethyl tertiary butyl ether.
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International Search Report with Written Opinion of the Searching Authorityissued in PCT Application No. US2008/074278, dated Mar. 20, 2009. (9 pages).
Loescher Mitchell E.
Smith, Jr. Lawrence A.
Catalytic Distillation Technologies
Keys Rosalynd
Osha • Liang LLP
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