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:
Jun. 11, 2019
Filed:
Jan. 22, 2016
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Shiho Tsuji, Tokyo, JP;
Masayuki Watanabe, Tokyo, JP;
Yutaka Nuruki, Tokyo, JP;
Shoichi Miyawaki, Tokyo, JP;
NIPPON PAPER INDUSTRIES CO., LTD., Tokyo, JP;
Abstract
An object of present invention is to provide a method for easily extracting and efficiently recovering xylan from wood. A xylan-containing material is produced by a method comprising steps of: (a) adding an acid and/or carbon dioxide to a black liquor discharged during a soda cooking step of wood chips including hardwood chips to adjust the pH of the black liquor to be in the range of 1 to 9, thereby giving a suspension; (b) dehydrating and washing an insoluble matter generated in the suspension to separately collect the insoluble matter; and (c) adding an organic solvent to the insoluble matter obtained at the step (b) to give a suspension, and separately collecting a xylan-containing material made of the insoluble matter present in the suspension by solid/liquid separation.