Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2006-05-02
2006-05-02
Price, Elvis O. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S861000, C568S852000, C568S868000
Reexamination Certificate
active
07038094
ABSTRACT:
Methods and compositions for reactions of hydrogen over a Re-containing catalyst with compositions containing a 5-carbon sugar, sugar alcohol, or lactic acid are described. It has been surprisingly discovered that reaction with hydrogen over a Re-containing multimetallic catalyst resulted in superior conversion and selectivity to desired products such as propylene glycol. A process for the synthesis of PG from lactate or lactic acid is also described.
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Zhang, Z., et al. “Aqueous-Phase Hydrogenation of Lactic Acid to Propylene Glycol.” p. 89-98. 2001.
Frye, Jr. John G.
Miller Dennis J.
Werpy Todd A.
Zacher Alan H.
Battelle (Memorial Institute)
Price Elvis O.
Wells St. John P.S.
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