Continuous counter-current organosolv processing of lignocellulosic feedstocks

a technology of lignocellulosic feedstock and organosolv, which is applied in the field of lignocellulosic feedstock fractionation, can solve the problems that the current available processes and systems are not yet economically feasible, and achieve the effects of facilitating and enhancing the rates and facilitating and enhancing the rate of concurrent fermentation and/or fermentation efficiencies and/or fermentation yields
US20080295980A1Inactive Publication Date: 2008-12-04LIGNOL INNOVATIONS
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
LIGNOL INNOVATIONS
Publication Date
2008-12-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A modular process for organosolv fractionation of lignocellulosic feedstocks into component parts and further processing of said component parts into at least fuel-grade ethanol and four classes of lignin derivatives. The modular process comprises a first processing module configured for physico-chemically digesting lignocellulosic feedstocks with an organic solvent thereby producing a cellulosic solids fraction and a liquid fraction, a second processing module configured for producing at least a fuel-grade ethanol and a first class of novel lignin derivatives from the cellulosic solids fraction, a third processing module configured for separating a second class and a third class of lignin derivatives from the liquid fraction and further processing the liquid fraction to produce a distillate and a stillage, a fourth processing module configured for separating a fourth class of lignin derivatives from the stillage and further processing the stillage to produce a sugar syrup.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation-in-part of our prior application Ser. No. 11 / 839,378 filed Aug. 15, 2007, and claims the benefit of U.S. Provisional Application No. 60 / 941,220 filed May 31, 2007.FIELD OF THE INVENTION

[0002] This invention relates to fractionation of lignocellulosic feedstocks into component parts. More particularly, this invention relates to processes, systems and equipment configurations for recyclable organosolv fractionation of lignocellulosic material for continuous controllable and manipulable production and further processing of lignins, monosaccharides, oligosaccharides, polysaccharides and other products derived therefrom.BACKGROUND OF THE INVENTION

[0003] Industrial processes for production of cellulose-rich pulps from harvested wood are well-known and typically involve the steps of physical disruption of wood into smaller pieces and particles followed by chemical digestion under elevated temperatures and pressur...

Claims

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