Product and processes from an integrated forest biorefinery
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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Abstract
An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and/or water extracted prior to pulping and bleaching. The lignocellulosic material may be mechanically pulped and bleached in the presence of an enzyme that breaks lignin-carbohydrate complexes. The aqueous extract in embodiments including a water extract step is separated into acetic acid and hemicellulose sugar aqueous solutions.
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Citations
15 Claims
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1. A process of pulping lignocellulosic materials comprising:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification