US 5,326,912 A · Hydrogenation catalyst, and a method for its preparation and use, in particular for hydrogenation and/or hydrogenolysis of carbohydrates and polyhydric alcohols

Abstract

A metallic catalyst composition on an inert support, suitable in particular for hydrogenolysis reactions of higher polyhydric alcohols, characterised in that it comprises the following relative to 100 parts of the catalyst: a) 0.5 to 5 weight % ruthenium; b) 1 to 10 weight % of a metal selected from the group consisting of palladium, platinum and rhodium; and c) 0.5 to 2.5 weight % copper, in which the copper content is lower than the content of the metal b). The catalyst is used in particular for producing lower polyhydric alcohols such as ethanediol, propylene glycol, butanediol and glycerol, by means of hydrogenolysis reaction of higher polyhydric alcohols.

Claims9

Dependent claims

A method for producing a lower polyhydric alcohol, or mixtures thereof, by means of hydrogenolysis under pressure of a higher polyhydric alcohol or a mixture of higher polyhydric alcohols, in the presence of a tri-metallic catalyst comprising, relative to 100 parts of the catalyst:

(a) 0.5 to 5 weight % ruthenium;
(b) 1 to 10 weight % of a metal consisting of either palladium, platinum or rhodium;
and
(c) 0.5 to 2.5 weight % copper, wherein the copper content is lower than the content of the metal disclosed in (b), and
wherein the catalyst is on an inert support comprising activated carbon.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

08/011,189Filed 29 Jan 1993

Priority

IT TO92A00008031 Jan 1992

Granted

5 Jul 1994

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

C07C 29/00
Preparation of compounds having hydroxy or o-metal groups bound to a carbon
B01J 23/8926
Combined with noble metals: copper and noble metals
C07C 29/60
Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring: by elimination of…
Y02P 20/52
Improvements relating to the production of bulk chemicals: using catalysts, e.g. selective catalysts

Hydrogenation catalyst, and a method for its preparation and use, in particular for hydrogenation and/or hydrogenolysis of carbohydrates and polyhydric alcohols

Life of this patent

Hydrogenation catalyst, and a method for its preparation and use, in particular for hydrogenation and/or hydrogenolysis of carbohydrates and polyhydric alcohols

Life of this patent

Abstract

Claims9