초록 ▼

A economically viable method for producing sugars using concentrated acid hydrolysis of biomass containing cellulose and hemicellulose is disclosed. The cellulose and hemicellulose in the biomass is first decrystallized and then hydrolyzed to produce a hydrolysate containing both sugars and acid. Si

A economically viable method for producing sugars using concentrated acid hydrolysis of biomass containing cellulose and hemicellulose is disclosed. The cellulose and hemicellulose in the biomass is first decrystallized and then hydrolyzed to produce a hydrolysate containing both sugars and acid. Silica and silicates present in the biomass can then be removed for further processing. The remaining solids are then subjected to a second decrystallization if necessary and a second hydrolyzation to optimize the sugar yields.

대표청구항 ▼

A method of producing sugars from materials containing cellulose and hemicellulose comprising: mixing the materials with a solution of about 25-90% acid by weight thereby at least partially decrystallizing the materials and forming a gel that includes solid material and a liquid portion; diluting sa

A method of producing sugars from materials containing cellulose and hemicellulose comprising: mixing the materials with a solution of about 25-90% acid by weight thereby at least partially decrystallizing the materials and forming a gel that includes solid material and a liquid portion; diluting said gel to an acid concentration of from about 20% to about 30% by weight and heating said gel to a temperature between about 80°C. and 100°C. thereby partially hydrolyzing the cellulose and hemicellulose contained in said materials; separating said liquid portion from said solid material, thereby obtaining a first liquid containing sugars and acid; mixing the separated solid material with a solution of about 25-90% acid until the acid concentration of the gel is between about 20-30% acid by weight and heating the mixture to a temperature between about 80°C. and 100°C. thereby further hydrolyzing cellulose and hemicellulose remaining in said separated solid material and forming a second solid material and a second liquid portion; separating said second liquid portion from said second solid material thereby obtaining a second liquid containing sugars and acid; combining the first and second liquids; and separating the sugars from the acid in the combined first and second liquids by resin separation to produce a third liquid containing a total of at least about 15% sugar by weight, which is not more than 3% acid by weight.