Patent ID: 7465844
Filing Date: 2008-12-16
Classification: C10G,C10J,C10L,Y02E

Abstract:
1. A method of upgrading a biomass, comprising: an upgrading step for performing upgrading treatment of a cellulose based biomass with an oxygen/carbon atomic ratio of at least 0.5, in presence of water, under a pressure of at least saturated water vapor pressure, and at a temperature of 250 to 350° C. for a period of 5 to 120 minutes, and reducing said oxygen/carbon atomic ratio of said biomass from 0.216 to 0.38, and a separation step for separating an upgraded reactant obtained from said upgrading step into a solid component and a liquid component, and recovering said solid component which is an upgraded biomass with said oxygen/carbon atomic ratio of 0.216 to 0.38 whose recovered weight is at least 40% of the weight of said cellulose based biomass.