Patent ID: 9206098
Filing Date: 2015-12-08
Classification: C07C,C07D,C13K

Abstract:
1. A method for obtaining sugar alcohols having five to six carbon atoms from cellulose-containing material or mixtures thereof, said method comprising (a) bringing the cellulose-containing starting material into close contact with an acid by an impregnation carried out in the liquid or gaseous phase, (b) subjecting the cellulose-containing material impregnated with the acid and optionally dried to a mechanical treatment in order to reduce the degree of polymerisation of the cellulose-containing material, wherein the mechanical treatment is carried out at least until the degradation or cleavage products of the cellulose-containing material are water-soluble in a proportion of more than 60% by weight, in relation to the used cellulose-containing material, and (c) subjecting the obtained reaction product to a hydrogenation treatment with hydrogen in the presence of a catalyst with a content of transition metal elements, selected from the group consisting of elements of groups 3 to 10 of the periodic system (IUPAC) and mixtures thereof.