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:
Dec. 24, 2019
Filed:
May. 26, 2016
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Leif Robertson, Parainen, FI;
Veli-Matti Vuorenpalo, Espoo, FI;
Jonas Konn, Espoo, FI;
Kaisa Kaski, Vaasa, FI;
Assignee:
Kemira Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21C 9/00 (2006.01); D21C 9/10 (2006.01); D21C 3/04 (2006.01); D21C 3/22 (2006.01); D21C 3/00 (2006.01); C07C 409/26 (2006.01); D21C 1/02 (2006.01); D21C 3/02 (2006.01); D21C 3/26 (2006.01);
U.S. Cl.
CPC ...
D21C 9/004 (2013.01); C07C 409/26 (2013.01); D21C 1/02 (2013.01); D21C 3/00 (2013.01); D21C 3/022 (2013.01); D21C 3/04 (2013.01); D21C 3/222 (2013.01); D21C 3/26 (2013.01); D21C 9/10 (2013.01); D21C 9/1036 (2013.01); D21C 9/1052 (2013.01);
Abstract
The invention relates to a method for reducing pulp viscosity in production of dissolving pulp. The method comprises producing cellulose pulp, whereby the obtained cellulose pulp has a cellulose content of at least 90%, and bleaching the obtained cellulose pulp. The cellulose pulp is treated after bleaching with performic acid.