Patent ID: 9102879
Filing Date: 2015-08-11
Classification: C10G,C10L,Y02P

Abstract:
1. A method comprising: (i) providing a biomass containing celluloses, hemicelluloses and lignin; (ii) contacting the biomass with an aqueous media to form an extracted biomass comprising celluloses, hemicelluloses, soluble carbohydrates and lignin; (iii) separating at least a portion of an aqueous liquor from the extracted biomass thereby providing the aqueous liquor stream comprising soluble carbohydrates and a pretreated biomass solids stream comprising celluloses, hemicelluloses, and lignin; (iv) contacting said extracted biomass solids stream with a first digestive solvent to form a pretreated biomass comprising celluloses, residual hemicelluloses and lignin; (v) contacting said pretreated biomass with a second digestive solvent to form a solubilized pulp comprising soluble carbohydrates; (vi) contacting the aqueous liquor stream with a purification substrate effective to remove sulfur compounds and nitrogen compounds thereby producing a treated carbohydrate stream having less than 35% of the sulfur content and less than 35% of the nitrogen content based on the untreated aqueous liquor stream; (vii) contacting the treated carbohydrate stream and the solubilized pulp with an aqueous phase reforming catalyst to form a plurality of oxygenated intermediates wherein a first portion of the oxygenated intermediates are recycled to form the second digestive solvent; and (viii) processing at least a second portion of the oxygenated intermediates to form a liquid fuel.