Title:
CATALYSTS AND PROCESS FOR HYDROGENOLYSIS OF SUGAR ALCOHOLS TO POLYOLS
Document Type and Number:
WIPO Patent Application WO2001066499
Kind Code:
A9
Abstract:
The present invention provides a process for preparation of low molecular weight polyols from high molecular weight polyols in a hydrogenolysis reaction under elevated temperature and hydrogen pressure. The process comprises providing in a reaction mixture the polyols, a base, and a metal catalyst prepared by depositing a transition metal salt on an inert support, reducing the metal salt to the metal with hydrogen, and passivating the metal with oxygen, and wherein the catalyst is reduced with hydrogen prior to th e reaction. In particular, the process provides for the preparation of glycerol, propylene glycol, and ethylene glycol from sugar alohols such as sorbitol or xylitol. In a preferred process, the metal catalyst comprises ruthenium which is deposited on an alumina, titania, or carbon support, and the dispersion of the ruthenium on the support increases during the hydrogenolysis reaction.
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Inventors:
CHOPADE SHUBHAM P (US)
MILLER DENNIS J (US)
JACKSON JAMES E (US)
WERPY TODD A (US)
FRYE JOHN G JR (US)
ZACHER ALAN H (US)
MILLER DENNIS J (US)
JACKSON JAMES E (US)
WERPY TODD A (US)
FRYE JOHN G JR (US)
ZACHER ALAN H (US)
Application Number:
PCT/US2001/000536
Publication Date:
May 18, 2006
Filing Date:
January 08, 2001
Export Citation:
Assignee:
UNIV MICHIGAN STATE (US)
BATTELLE MEMORIAL INSTITUTE (US)
BATTELLE MEMORIAL INSTITUTE (US)
International Classes:
C07C29/00; (IPC1-7): C07C29/00
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