Single-step catalytic process for the direct conversion of polysaccharides to polyhydric alcohols
US4950812A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Feb 22, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/132
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A single-step process for the conversion of polysaccharides to polyhydric alcohols by hydrogenation at high pressure and temperature in the presence of a catalyst comprising (i) a supported metal selected from ruthenium, copper, nickel, cobalt and their mixtures, the metal being highly dispersed on the support so as to be capable of adsorbing more than 0.58 molecules of CO per atom of metal, and (ii) a solid having acidic functions, which may or may not be identical to the support, the solid having sufficient acid functions so that the rate constant of hydrolysis of sucrose on the catalyst is greater than 70% of the rate constant of hydrogenation of glucose on the catalyst. The process gives substantially pure polyhydric alcohols in a single step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.