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Product and processes from an integrated forest biorefinery

  • US 9,273,431 B2
  • Filed: 01/23/2015
  • Issued: 03/01/2016
  • Est. Priority Date: 04/20/2004
  • Status: Active Grant
First Claim
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1. A process of pulping lignocellulosic materials comprising:

  • (a) contacting a lignocellulosic materials product with water, the water at a temperature in the range of between about 140°

    C. and about 200°

    C. and the water at a pH in the range of between about 3 and about 6.9, for a period in the range of between about 15 minutes and about 180 minutes, wherein an aqueous extract and extracted lignocellulosic materials are obtained; and

    (b) pulping said extracted lignocellulosic materials wherein individual fibers and fiber bundles are produced and have a kappa number of at most about 10 after about 30 minutes.

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