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:
May. 17, 2011
Filed:
Dec. 30, 2009
Adriaan Reinhard Pieter Van Heiningen, Orono, ME (US);
Sung-hoon Yoon, Old Town, ME (US);
Haixuan Zou, Orono, ME (US);
Jianer Jiang, Mason, OH (US);
Gopal C. Goyal, Mason, OH (US);
Adriaan Reinhard Pieter van Heiningen, Orono, ME (US);
Sung-Hoon Yoon, Old Town, ME (US);
Haixuan Zou, Orono, ME (US);
Jianer Jiang, Mason, OH (US);
Gopal C. Goyal, Mason, OH (US);
University of Maine System Board of Trustees, Bangor, ME (US);
International Paper Company, Memphis, TN (US);
Abstract
A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. In one embodiment, the pre-extraction step involves contacting the lignocellulosic material with an aqueous solution under conditions that release acidic material from the lignocellulosic material into the aqueous solution, and the aqueous solution includes a basic material that at least partly neutralizes the acidic material so that the aqueous solution at the end of the pre-extraction step has a pH within a range of from 4.5 to 11. The process also includes a pulping step, after the pre-extraction step, in which the lignocellulosic material is separated into pulp. The process further includes an adsorption step, after the pulping step, in which hemicellulose is adsorbed on the pulp.