Patent ID: 7754457
Filing Date: 2010-07-13
Classification: C12P,D21C,Y02E

Abstract:
1. A continuous process for providing a processed lignocellulosic feedstock comprising the steps of: a. pretreating a lignocellulosic feedstock at elevated pressure in a pretreatment reactor at a pH between about 0.4 and about 2.0 to produce a pressurized, pretreated lignocellulosic feedstock; b. adding one or more than one soluble base to the pressurized, pretreated lignocellulosic feedstock after exit from the pretreatment reactor to adjust the pressurized, pretreated lignocellulosic feedstock to an intermediate pH of between about pH 2.5 and about pH 3.5 to produce a pressurized, partially-neutralized feedstock; and c. further processing the pressurized, partially-neutralized feedstock at the intermediate pH to produce the processed lignocellulosic feedstock.