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:
Nov. 01, 2011
Filed:
Mar. 26, 2010
Applicants:
Martin Herkel, Vienna, AT;
Thomas Pschorn, Lennoxville, CA;
Eric Chao Xu, Miamisburg, OH (US);
Inventors:
Assignee:
Andritz Inc., Muncy, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C 9/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for applying chemicals, such as an alkaline peroxide pretreatment () to lignocellulosic material before chemical refining and at the primary refiner (). The preferred embodiment comprises (i) preconditioning at temperatures below 95° C., especially below 80° C., (ii) limiting the time and/or temperature in the refiner, (iii) reaction quench to maintain temperatures below 80° C., and (iv) subsequent high consistency bleaching ().