Iogen Energy Corporation

Daphne Wahnon

Jeffrey S Tolan

Brian Foody

Theresa C White

Vijay Anand

Robert John Griffin

Jennifer Donaldson

Vladimir Pavlovic

A process for recovering a volatile carboxylic acid from an aqueous stream containing same comprising the steps of: (a) evaporating the aqueous stream to produce a vapour stream comprising the volatile carboxylic acid that has been vapourized and water vapour, which aqueous stream is produced by a conversion process using a lignocellulosic feedstock as a substrate; (b) contacting the vapour stream with an organic solvent so as to extract the volatile carboxylic acid present in the vapour stream, thereby producing a liquid stream comprising the organic solvent and the volatile carboxylic acid, and a water vapour stream, wherein the organic solvent has an atmospheric boiling point of at least about 150&#xb0; C. and is insoluble in water; and (c) separating the volatile carboxylic acid from the organic solvent.

Recovery of volatile carboxylic acids by extractive evaporation

A method for processing of a lignocellulosic feedstock is provided comprising exposing lignocellulosic feedstock to acid in a reactor to hydrolyze at least hemicellulose present in said lignocellulosic feedstock, wherein during said exposing, a scale deposit comprising lignin forms on the inner surface of said reactor; and treating the scale deposit with an alkali solution at a temperature between about 140&#xb0; C. and about 250&#xb0; C. so as to remove scale. Also provided is a method for reducing scale deposit that forms on process equipment during a stage of reacting a lignocellulosic feedstock with acid.

Method for scale removal during a lignocellulosic conversion process

The present invention pertains to a method of converting cellulose to glucose by treating a pretreated lignocellulosic substrate with an enzyme mixture comprising cellulase enzyme and endoglucanase core proteins, wherein the endoglucanase core proteins are present in the enzyme mixture at an amount relative to all endoglucanases from about 35 wt. % to about 100 wt. % and wherein the endoglucanase cellulase enzymes are present in the enzyme mixture at an amount relative to the amount of CBH and EG enzymes from about 2 wt. % to about 50 wt. %. The pretreated lignocellulosic substrate is selected from the group consisting of agricultural residues, residues after starch or sugar removal, dedicated ethanol crops, forestry products, and pulp and paper products, or combinations thereof.

Method for glucose production using endoglucanase core protein for improved recovery and reuse of enzyme

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Daphne Wahnon