Selective catalytic hydrogenation of aromatic aldehydes

US5387726A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Martin Bankmann · Gelnhausen, DE
• Reinhold Brand · Hanau, DE
• Andreas Freund · Kleinostheim, DE
• Thomas Tacke · Friedrichsdorf, DE

Key dates

• Filing date: Jan 7, 1994
• Grant date: Feb 7, 1995
• Expiry date: Jan 7, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is disclosed for the selective catalytic hydrogenation of carbonyl groups in aromatic aldehydes of the formula: ##STR1## in which X is carboxyl, methyl or a halogen, to give the corresponding alcohols and methyl compounds. The catalytic hydrogenation is performed with the addition of a solvent optionally in the presence of organic acids on a shaped support catalyst containing a platinum group metal on a support made from titanium oxide in the presence of hydrogen at hydrogen partial pressures of 5 to 50 bar and temperatures of 100.degree. to 300.degree. C.