Patent Number: 8,715,419

Title: Method for treating, pressing and washing biomass

Abstract: A method to process cellulosic material in a treatment vessel including: introducing the cellulosic material to a processing chamber of the vessel; adding heat energy or pressure to the vessel to hydrolyze the cellulosic material in the processing chamber and dissolve hemi-cellulosic from the cellulosic material; compressing the cellulosic material in the processing chamber; extracting the dissolved hemi-cellulosic material through a screen from the processing section; draining the extracted hemi-cellulosic material from the vessel; and discharging the cellulosic material from the vessel separately from the extracted hemi-cellulosic material.

Inventors: Mraz; Peter (Klosterneuburg, AT), Pschorn; Thomas (Sherbrooke, CA), Stromberg; Bertil (Diamond Point, NY), Shin; Namhee (Lake Forest, IL)

Assignee: Andritz Inc.

International Classification: B01J 3/00 (20060101); C13K 1/02 (20060101)

Expiration Date: 5/06/12018