Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2008-11-20
2009-11-10
Price, Elvis O (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S862000, C568S863000
Reexamination Certificate
active
07615671
ABSTRACT:
Disclosed is a process for the preparation of 1,2-glycols by hydrogenation of 1,2-dioxygenated organic compounds in the presence of a catalyst composition comprising a ruthenium compound, a trivalent phosphorus compound selected from 1,1,1-tris(diarylphosphinomethyl)alkyl or substituted alkyl, and a promoter selected from Lewis acids, protic acids having an ionization constant (Ki) of 5×10−3or greater, and onium salts. The process is useful for the hydrogenation of glycolic acid or derivatives thereof to ethylene glycol.
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International Search Report dated Apr. 21, 2009 in corresponding PCT application PCT/US2008/013085.
Hampton, Jr. Kenneth Wayne
Puckette Thomas Allen
Eastman Chemical Company
Graves, Jr. Bernard J.
Middlemas Eric D.
Price Elvis O
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