The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2016
Filed:
Jun. 09, 2014
The United States of America As Represented BY the Secretary of Agriculture, Washington, DC (US);
JunYong Zhu, Madison, WI (US);
Roland Gleisner, Jefferson, WI (US);
The United States of America as Represented by the Secretary of Agriculture, Washington, DC (US);
Abstract
Methods of pretreating lignocellulosic biomass in preparation for enzymatic saccharification and fermentation are provided. Also provided are methods of producing ethanol from lignocellulosic biomass via enzymatic saccharification and fermentation that utilize the pretreatment method. In the methods, pretreatment is conducted in two stages. In the first stage, the lignocellulosic biomass is treated in a mildly acidic or near pH-neutral solution to promote delignification and lignin sulfonation, while minimizing the formation of degradation products that inhibit subsequent enzymatic saccharification and/or fermentation. In the second stage, the pH of the solution is decreased in order to promote the depolymerization and dissolution of hemicelluloses in the lignocellulosic biomass.