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. 10, 2017
Filed:
Apr. 03, 2013
Applicants:
Kemira Oyj, Helsinki, FI;
Andritz Oy, Helsinki, FI;
Upm-kymmene Corporation, Helsinki, FI;
Stora Enso Oyj, Helsinki, FI;
Metsä Fibre Oy, Metsä, FI;
Inventors:
Assignees:
KEMIRA OYJ, Helsinki, FI;
ANDRITZ OY, Helsinki, FI;
UPM-KYMMENE CORPORATION, Helsinki, FI;
STORA ENSO OYJ, Helsinki, FI;
METSÄ FIBRE OY, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 17/07 (2006.01); D21H 21/32 (2006.01); D21C 9/12 (2006.01); D21C 9/14 (2006.01); D21C 9/10 (2006.01); D21H 17/66 (2006.01); D21H 17/00 (2006.01);
U.S. Cl.
CPC ...
D21C 9/12 (2013.01); D21C 9/1036 (2013.01); D21C 9/14 (2013.01); D21C 9/144 (2013.01); D21H 17/07 (2013.01); D21H 21/32 (2013.01); D21H 17/66 (2013.01); D21H 17/74 (2013.01);
Abstract
A method for bleaching pulp is provided. In the method at least one tertiary amine compound is introduced into a process stage of bleaching. This process stage is a stage which comprises mixing pulp and a chlorine compound capable of bleaching.