Weyerhaeuser Company Limited

Weyerhaeuser Nr Company

David E Severeid

Richard A Jewell

S Ananda Weerawarna

Bing Su

Joseph Lincoln Komen

Angela P Gifford

Lignocellulosic biomass materials are fractionated by dissolving at least a portion of the lignocellulosic material in an ionic liquid and separating the resulting mixture into a cellulose-enriched fraction and/or a lignin-enriched fraction. The cellulose-enriched fraction contains about 10 percentage points more glucose than the weight percent glucose contained in the original lignocellulosic biomass material. In certain embodiments, the lignin-enriched fraction includes a lignin content that is 5 percentage points greater than the weight percent lignin present in the original lignocellulosic material. The techniques used to isolate the cellulose-enriched fractions and/or the lignin-enriched fractions from the ionic liquid mixture do not employ environmentally unfriendly solvents.

Fractionation of lignocellulosic material using ionic liquids

An apparatus for carboxylating wood pulp which utilizes the wood pulp bleach plant and the method of carboxylating the pulp which takes place in the bleach plant.

Apparatus for making carboxylated pulp fibers

Growing community of inventors

Puyallup, WA, United States of America

David E Severeid