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Method of continuous processing of lignocellulosic feedstock

  • US 7,754,457 B2
  • Filed: 06/02/2006
  • Issued: 07/13/2010
  • Est. Priority Date: 06/03/2005
  • Status: Expired due to Fees
First Claim
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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.

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