Processes for producing cellulose pulp and pulp-derived products from lignocellulosic biomass

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United States of America Patent

PATENT NO 9556557
SERIAL NO

15098383

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Abstract

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The GreenBox+ technology is suitable to extract hemicellulose sugars prior to pulping of biomass into pulp products. The revenue obtainable from the sugar stream can significantly improve the economics of a pulp and paper mill. An initial extraction and recovery of sugars is followed by production of a pulp product with similar or better properties. Other co-products such as acetates and furfural are also possible. Some variations provide a process for co-producing pulp and hemicellulosic sugars from biomass, comprising: digesting the biomass in the presence of steam and/or hot water to extract hemicellulose into a liquid phase; washing the extracted solids, thereby generating a liquid wash filtrate and washed solids; separating the liquid wash filtrate from the washed solids; refining the washed solids at a refining pH of about 4 or higher, thereby generating pulp; and hydrolyzing the hemicellulose to generate hemicellulosic fermentable sugars.

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Patent Owner(s)

  • API INTELLECTUAL PROPERTY HOLDINGS, LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Pylkkanen, Vesa Atlanta, US 108 610
Retsina, Theodora Atlanta, US 148 778
Rutherford, Steven R Peachtree City, US 10 14

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