PROCESS FOR ISOLATING FERMENTABLE SUGARS FROM THE ACID HYDROLYZATE OF A MATERIAL CONTAINING CELLULOSE, HEMICELLULOSE AND LIGNIN

摘要

The present invention provides a process for isolating fermentable sugars from the acid hydrolyzate of a material containing cellulose, hemicellulose and lignin, particularly a process which is simple, economical and commercially viable.

主权项

1. A process for isolating fermentable sugars from the hydrolyzate obtained from the acid hydrolysis of a material containing cellulose, hemicellulose and lignin; wherein the process comprises:
(a) neutralizing the hydrolyzate with an alkali and filtering the resultant mixture to recover lignin as a solid; (b) drying the filtrate of step (a) to obtain a residue comprising fermentable sugars and salts; (c) extracting fermentable sugars from the residue with C1-C6 alcohol or their mixtures; and (d) evaporating the alcohol to yield fermentable sugars.