Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2007-07-31
2007-07-31
Witherspoon, Sikarl A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S362000, C568S830000, C568S835000
Reexamination Certificate
active
10553792
ABSTRACT:
The present invention provides a novel method of hydrogenating a phenol for hydrogenating a phenol industrially advantageously. The present invention relates, in the case of phenol hydrogenation in which carbon dioxide is made to participate in the reaction, to a method of hydrogenating a phenol characterized by using a supported rhodium and/or ruthenium catalyst, whereby the phenol is hydrogenated efficiently at a lower reaction temperature than with prior art; such a method characterized in that carbon dioxide having a temperature of 20 to 250° C. and a pressure of 0.1 to 50 MPa is used as the carbon dioxide; and such a method characterized in that hydrogen under conditions of a temperature of 20 to 250° C. and a pressure of 0.1 to 50 MPa is used.An environmentally friendly phenol hydrogenation process that uses no harmful organic solvents can be realized.
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Nagendranath Mahata et al., “Influence of palladium precursors on structural properties and phenol hydrogenation characteristics of supported palladium catalysts”, Journal of Catalysis, vol. 196, pp. 262-270 2000.
Joshi Uday Dattopant
Rode Chandrashekhar Vasant
Sato Takafumi
Shirai Masayuki
Torii Kazuo
National Institute of Advanced Industrial Science and Technology
Witherspoon Sikarl A.
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