Robert W Torget, Kiran L Kadam, Teh An Hsu, George P Philippidis, Charles E Wyman: Prehydrolysis of lignocellulose. Midwest Research Institute, Edna M O Connor, June 13, 1995: US05424417 (100 worldwide citation)

The invention relates to the prehydrolysis of lignocellulose by passing an acidic or alkaline solution through solid lignocellulosic particles with removal of soluble components as they are formed. The technique permits a less severe combination of pH, temperature and time than conventional prehydro ...

Hans E Grethlein: Process for pretreating cellulosic substrates and for producing sugar therefrom. Trustees of Dartmouth College, Robert Shaw, December 2, 1980: US04237226 (97 worldwide citation)

Processes for treating cellulosic substances prior to hydrolysis which lead to shortening hydrolysis time and to increasing sugar yield. As exemplary, an aqueous slurry of the cellulosic substance is acidified and heated to and maintained at a temperature to produce a change in the cellulosic struct ...

David L Brink: Method of treating biomass material. Flehr Hohbach Test Albritton & Herbert, July 16, 1996: US05536325 (96 worldwide citation)

Two stage hydrolysis of lignocellulosic material, conditions during the first stage being such as to hydrolyze or depolymerize the hemicellulosic component without substantial degradation of resulting monosaccharides, conditions during the second stage being such as to hydrolyze the cellulose to glu ...

Robert W Torget, Nandan Padukone, Christos Hatzis, Charles E Wyman: Hydrolysis and fractionation of lignocellulosic biomass. Midwest Research Institute, Ken Richardson, February 8, 2000: US06022419 (91 worldwide citation)

A multi-function process is described for the hydrolysis and fractionation of lignocellulosic biomass to separate hemicellulosic sugars from other biomass components such as extractives and proteins; a portion of the solubilized lignin; cellulose; glucose derived from cellulose; and insoluble lignin ...

Donald L Brelsford: Bei hydrolysis process system an improved process for the continuous hydrolysis saccharification of ligno-cellulosics in a two-stage plug-flow-reactor system. May 2, 1995: US05411594 (87 worldwide citation)

An improved two-stage dilute-acid hydrolysis process and apparatus the continuous saccharification of ligno-cellulosic biomass, or other cellulosic material feedstocks, with higher efficiency and better economics than known art, is disclosed. It comprises two double-tube heat-exchanger and plug-flow ...

Laszlo Paszner, Pei Ching Chang: High efficiency organosolv saccharification process. Ian C McLeod, September 11, 1984: US04470851 (80 worldwide citation)

Comminuted cellulosic materials which may or may not contain lignin are partially or totally hydrolyzed or saccharified by an improved organosolv process using an aqueous acetone solvent mixture containing a small amount of an acidic compound and containing at least about 70 percent by volume of ace ...

Charles K Lombard: Process for the production of organic products from diverse biomass sources. Waste Energy Integrated Systems, Beyer Weaver & Thomas, June 25, 2002: US06409841 (79 worldwide citation)

Disclosed are processes and systems for the production of useful organic product from diverse lignocellulose-containing biomass having increased yield and efficiency over existing processes. In particular, the present invention integrates dilute acid hydrolysis and alkaline delignification technique ...

Michael I Sherman, Carl L Elmore: Acid hydrolysis of biomass for alcohol production. Kamyr, Nixon & Vanderhye, September 16, 1986: US04612286 (77 worldwide citation)

A method of treating biomass having fermentable material is provided utilizing acid hydrolysis in a countercurrent diffusion treatment structure. By practicing the invention acid usage is minimized, pentose concentration in the hydrolysate solution is maximized, and ethanol, butanol, butanediol, and ...

Donald S Scott, Jan Piskorz, Desmond Radlein, Piotr Majerski: Process for the production of anhydrosugars from lignin and cellulose containing biomass by pyrolysis. Energy Mines and Resources Canada, March 7, 1995: US05395455 (73 worldwide citation)

A process is described for the production of anhydrosugars such as levoglucosan (1,6-anhydro-.beta.-D-glucopyranose), from liquids obtained by the fast thermal pyrolysis of pretreated lignocellulosics or celluloses. In this process, the pyrolytic liquids containing the anhydrosugars are produced wit ...

Minoru Kumakura, Noboru Kasai, Masao Tamada, Isao Kaetsu: Method of pretreatment in saccharification and fermentation of waste cellulose resource. Japan Atomic Energy Research Institute, Browdy and Neimark, September 6, 1988: US04769082 (72 worldwide citation)

The efficiency of enzymatic saccharification and fermentation of cellulose in a waste cellulose resource can be increased by a preliminary treatment with ionizing radiation. This irradiation of the waste cellulose resource can be accelerated by the preliminary addition of an aqueous alkali solution.