Sugar – starch – and carbohydrates – Processes – Carbohydrate manufacture and refining
Reexamination Certificate
2011-03-08
2011-03-08
Marx, Irene (Department: 1651)
Sugar, starch, and carbohydrates
Processes
Carbohydrate manufacture and refining
C435S161000, C435S163000, C435S165000, C127S044000
Reexamination Certificate
active
07901511
ABSTRACT:
The present invention provides a method of producing xylose from lignocellulosic feedstock. The method comprises disrupting lignocellulosic feedstock; leaching the lignocellulosic feedstock by contacting the feedstock with at least one aqueous solution for a period greater than about 2 minutes to produce a leached feedstock and a leachate; removing the leachate from the leached feedstock; acidifying the leached feedstock to a pH between about 0.5 and about 3 to produce an acidified feedstock, and; reacting the acidified feedstock under conditions which disrupt fiber structure and hydrolyze a portion of hemicellulose and cellulose of the acidified feedstock, to produce a composition comprising xylose and a pretreated feedstock. The xylose may be purified from the pretreated feedstock or it may be converted to ethanol with the pretreated feedstock.
REFERENCES:
patent: 2284500 (1942-05-01), Warth
patent: 3627636 (1971-12-01), Jaffe et al.
patent: 4137395 (1979-01-01), Buckl et al.
patent: 4160695 (1979-07-01), Dietrichs et al.
patent: 4168988 (1979-09-01), Riehm et al.
patent: 4181796 (1980-01-01), Dietrichs et al.
patent: 4237226 (1980-12-01), Grethlein
patent: 4326892 (1982-04-01), Madsen et al.
patent: 4427584 (1984-01-01), LeGrand et al.
patent: 4461648 (1984-07-01), Foody
patent: 4556430 (1985-12-01), Converse et al.
patent: 4857145 (1989-08-01), Villavicencio
patent: 5198074 (1993-03-01), Villavicencio et al.
patent: 5536325 (1996-07-01), Brink
patent: 5628830 (1997-05-01), Brink
patent: 5705369 (1998-01-01), Torget et al.
patent: 5846787 (1998-12-01), Ladisch et al.
patent: 6090595 (2000-07-01), Foody et al.
patent: 6251643 (2001-06-01), Hansen et al.
patent: 6333181 (2001-12-01), Ingram et al.
patent: 2003/0041982 (2003-03-01), Prior
patent: 34444 (1973-06-01), None
patent: 47-055856 (1972-06-01), None
patent: WO 95/13362 (1995-05-01), None
patent: WO 97/42307 (1997-11-01), None
Tseaa Shambe, John F Kennedy “Acid hydrolysis of chaotropically pretreated millet stalk, acha and rice straws and conversion of the products of ethanol” Enzyme Microbo Technol. vol. 7, 1985 p. 115.
Tom Richard “Substrate Compostition Table”Cornell Waste Management Institute Dec. 24, 1996.
Answers.com, “Leach” definition, http://www.answers.com/leaching?cat=technology&print=true, accessed Mar. 25, 2008 3:35:58 PM.
Tom Richard “Substrate Composition Table:Cornell Composting Science and Engineering” 9 pgs 1996 accessed at http://compost.css.cornell.edu/calc/lignin.noframes.html (9 of 9)Dec. 17, 2008.
J. J. Rackis “Soybean Protein : Uses, Problems, and Potential” J. Am. Oil Chemists' Soc., Apr. 1977 (vol. 54) p. 290.
Sigma-Aldrich; “Particle Size Conversion Table” 2pgs This information is also provided on p. T848 of the Aldrich 2003-2004 Catalog/Handbook of Fine Chemicals.
J. Fernindez-Bolanos et al. “Characterization of the lignin obtained by alkaline delignification and of the cellulose residue from steam-exploded olive stones” Bioresource Technology 68 (1999) 121-132.
Nazik N. Boulos et al. “Water holding capacity of selected soluble and insoluble dietary fibre” International Journal of Food Properties, vol. 3, Issue 2 Jul. 2000 , pp. 217-231.
Grethlein, Hans E., “Chemical Breakdown of Cellulosic Materials,”J. Appl. Chem. Biotechnol., 1978, 28, pp. 296-308.
Jenkins, B.M., et al., “Measurements of the Fouling and Slagging Characteristics of Banagrass (Pennisetum purpureum) Following Aqueous Extraction of Inorganic Constituents,”Making a Business from Biomass, pp. 705-718.
King, C. Judson,Separation Processes, 2d. Ed., McGraw-Hill, 1980, pp. 2-9.
Keim, C.R., Chapter 1, “Wet Milling of Grain for Alcohol Production,”The Alcohol Textbook, Nottingham University Press, 1995, pp. 1-9.
Tolan, J.S., Chapter 9, “Alcohol production from cellulosic biomass: the logen process, a model system in operation,”The Alcohol Textbook, 3d. Ed., Nottingham University Press, 1999, pp. 117-127.
Foody, Patrick, et al., “Optimization of Steam Explosion Pretreatment,” Final Report Submitted to U.S. Dept. of Energy, Contract No. DE-AC02-79ETZ3050, Iotech Corporation, Apr. 1980.
International Search Report, dated Feb. 10, 2003, for corresponding International Application No. PCT/CA02/00244.
International Preliminary Examination Report, dated Jul. 2, 2003, for corresponding International Application No. PCT/CA02/00244.
Richard, “Substrate Composition Table”, Cornell Composting Science and Engineering (1996) 1-9.
Rackis, “Soybean Protein: Uses, Problems and Potential”, J. Am. Oil Chemists' Soc., vol. 54 (1977) 290-94.
Grohmann, et al., “The Role of Ester Groups in Resistance of Plant Cell Wall Polysaccharides to Enzymatic Hydrolysis”, Applied Biochemistry and Biotechnology, vol. 20/21 (1989) 45-61.
Anand Vijay
Griffin Robert
Mott Corinne
Nicholson Colin
Tolan Jeffrey S.
Fitzpatrick ,Cella, Harper & Scinto
Iogen Energy Corporation
Marx Irene
Underdahl Thane
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