Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Inorganic carbon containing
Reexamination Certificate
2006-04-18
2006-04-18
Wood, Elizabeth D. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Inorganic carbon containing
C502S185000, C502S325000, C502S331000, C502S326000, C502S332000, C502S330000, C502S333000, C502S334000, C502S335000, C502S336000, C502S337000, C502S338000, C502S261000
Reexamination Certificate
active
07030052
ABSTRACT:
The invention relates to a process for hydrogenating an aromatic amine that has at least one amino group bound to an aromatic nucleus with hydrogen in the presence of a supported catalyst that contains at least ruthenium as active metal. The catalyst support has a BET surface area in the range from greater than 30 m2/g to less than 70 m2/g and more than 50% of the pore volume of the catalyst support is formed by macropores having a pore diameter of greater than 50 nm and less than 50% are mesopores having a pore diameter of 2 to 50 nm.
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G. F. Allen, Chem Ind., (Dekker), vol. 33, pp. 323-338, “The Hydrogenation of Methylenedianiline”, 1988, no month.
Burkhardt Werner
Finke Norbert
Grunert Juergen
Haas Thomas
Jaeger Bernd
Degussa - AG
Wood Elizabeth D.
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