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. 19, 2021
Filed:
Jun. 23, 2016
Applicant:
Teknologian Tutkimuskeskus Vtt Oy, Espoo, FI;
Inventors:
Hanne Wikberg, Espoo, FI;
Taina Ohra-Aho, Espoo, FI;
Juha Leppävuori, Espoo, FI;
Tiina Liitiä, Espoo, FI;
Assignee:
Teknologian tutkimuskeskus VTT Oy, Espoo, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07G 1/00 (2011.01); C08H 7/00 (2011.01); C08G 8/24 (2006.01); C08L 61/12 (2006.01); C08G 8/38 (2006.01); D21C 11/00 (2006.01); C08L 97/00 (2006.01);
U.S. Cl.
CPC ...
C08H 6/00 (2013.01); C07G 1/00 (2013.01); C08G 8/24 (2013.01); C08G 8/38 (2013.01); C08L 61/12 (2013.01); C08L 97/005 (2013.01); D21C 11/00 (2013.01); D21C 11/0007 (2013.01);
Abstract
According to an example aspect of the present invention, there is provided a method of producing reactive lignin from an alkaline lignin containing stream, such as black liquor, e.g. kraft lignin, by using thermal treatment with temperatures between 200 and 250° C. for simultaneous activation (for example by demethylation and/or demethoxylation) and precipitation of the lignin.