Document Type

Patent

Abstract

Dissolution, partial dissolution or softening of cellulose in an ionic liquid (IL) and its subsequent contact with anti-solvent produces regenerated cellulose more amorphous in structure than native cellulose, which can be separated from the IL/anti-solvent mixture by mechanical means such as simple filtration or centrifugation. This altered morphology of IL-treated cellulose allows a greater number of sites for enzyme adsorption with a subsequent enhancement of its saccharification. The IL-treated cellulose exhibits significantly improved hydrolysis kinetics with optically transparent solutions formed after about two hours of reaction. This provides an opportunity for separation of products from the catalyst (enzyme) easing enzyme recovery. With an appropriate selection of enzymes, initial hydrolysis rates for IL-treated cellulose were up to two orders of magnitude greater than those of untreated cellulose. Due to the non-volatility of the IL, anti-solvent can be easily stripped from the IL/anti-solvent mixture for recovery and recycle of both the ionic liquid and anti-solvent.

Patent Country

US

Patent Number

US7674608

Publication Date

3-9-2010

Assignee(s)

The University of Toledo

Application Number

11/710357

Filing Date

February 2007

Primary Class

435/99

Secondary Class

435/96

Rights

These materials are free of copyright restrictions and are in the public domain within the United States only. The USPTO reserves the right to assert copyright protection internationally.

Institution

The University of Toledo

Repository

University of Toledo Libraries

Digital Publisher

Digital Initiatives

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