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. 08, 2020
Filed:
Apr. 08, 2016
Applicant:
Södra Skogsägarna Ekonomisk Förening, Växjö, SE;
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
D21C 9/04 (2006.01); D21C 9/00 (2006.01); C08B 16/00 (2006.01); D21C 5/00 (2006.01); D21H 11/18 (2006.01);
U.S. Cl.
CPC ...
D21C 9/004 (2013.01); C08B 16/00 (2013.01); D21C 5/00 (2013.01); D21H 11/18 (2013.01);
Abstract
Disclosed is a method of treating cellulose pulp for use in regeneration of cellulose including the steps of: i) preparing an alkaline metal hydroxide solution having a concentration of 4-10% by weight; ii) adding cellulose pulp to form a slurry; iii) heating the slurry to a temperature of 40-100° C.; and iv) dissolving the treated cellulose pulp in an alkaline solution having a temperature within the range of −10° C. to 12° C.; wherein the percentage by weight is based on the total weight of the slurry.