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. 29, 2021
Filed:
Dec. 18, 2015
Applicant:
Upm-kymmene Corporation, Helsinki, FI;
Inventors:
Isko Kajanto, Espoo, FI;
Markus Nuopponen, Helsinki, FI;
Assignee:
UPM-KYMMENE CORPORATION, Helsinki, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B 15/04 (2006.01); G01N 27/416 (2006.01); C08B 17/06 (2006.01); B01J 14/00 (2006.01); B01J 19/00 (2006.01);
U.S. Cl.
CPC ...
C08B 15/04 (2013.01); B01J 14/00 (2013.01); B01J 19/0006 (2013.01); C08B 17/06 (2013.01); G01N 27/4168 (2013.01); B01J 2219/00186 (2013.01); Y02P 20/582 (2015.11);
Abstract
A method for controlling the catalytic oxidation of cellulose includes using a heterocyclic nitroxyl compound as catalyst; oxidizing cellulose in a reaction mixture comprising liquid medium, the catalyst and hypochlorite as main oxidant; analyzing one or more oxidative chlorine species dependent on the hypochlorite concentration of the reaction mixture on line in the reaction mixture or in a gas composition which is in contact with the reaction mixture; and controlling supply of hypochlorite to the reaction mixture on the basis of the analysis.