Process for transformation of lignocellulosic biomass or cellulose by catalysts based on tin oxide and/or antimony oxide and a metal that is selected from the groups 8 to 11

摘要

The invention relates to a process for transformation of lignocellulosic biomass or cellulose using heterogeneous catalysts that are based on tin oxide and/or antimony oxide, dispersed on a substrate and containing at least one element in the particular metal state. The use of these catalysts makes it possible to obtain directly upgradable products, in particular hydroxyacetone and propylene glycol with high selectivity.

主权项

1. Process for transformation of lignocellulosic biomass or cellulose into hydroxyacetone and propylene glycol, in which the lignocellulosic biomass or cellulose is brought into contact, under hydrothermal conditions and under a reducing atmosphere, with a heterogeneous catalyst that is based on tin oxide and/or antimony oxide and that contains at least one element in the metal state that is selected from among Pt, Ni, Ru, Cu, with said catalyst having Lewis-type acid sites, said content of Lewis acid sites being greater than 50% of the total acid site content, and with said process being carried out at a temperature of between 160 and 250° C., and at a pressure of between 0.5 and 20 MPa.