METHOD FOR SACCHARIFICATION AND SEPARATION OF PLANT FIBRE MATERIAL Russian patent published in 2012 - IPC C13K1/02 B09B3/00 

FIELD: chemistry.

SUBSTANCE: cellulose contained in plant fibre material is hydrolysed using a complex pseudo-molten acid catalyst to obtain saccharide, mainly glucose. A mixture containing an aqueous saccharide solution obtained at the hydrolysis step, a solution of a complex acid catalyst in an organic solvent and residues is divided into a solid portion which contains residues, and a liquid portion which contains an aqueous saccharide solution and a solution of complex acid in an organic solvent. The liquid portion is then dehydrated with a dehydrating agent which is capable of absorbing water via chemical absorption for precipitation of saccharide in the aqueous saccharide solution and separation of the solid portion containing saccharide from the liquid portion containing the complex acid catalyst and organic solvent. The dehydrating agent is an additive of a dehydrating substance, e.g., silica gel.

EFFECT: high efficiency of separating the obtained saccharide from the complex acid catalyst, which enables to obtain a high-purity aqueous saccharide solution, possibility of recycling the complex acid catalyst.

12 cl, 5 ex, 5 dwg, 2 tbl