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:
Apr. 25, 2017
Filed:
May. 16, 2012
Applicants:
Andre Lehmann, Potsdam, DE;
Horst Ebeling, Premnitz, DE;
Hans-peter Fink, Tetlow, DE;
Inventors:
Assignee:
Stora Enso OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01F 9/17 (2006.01); D01D 5/06 (2006.01); D01F 9/00 (2006.01); C08L 97/02 (2006.01); B29C 47/00 (2006.01); B29D 99/00 (2010.01); B29K 33/20 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
D01F 9/17 (2013.01); B29C 47/0014 (2013.01); B29D 99/0078 (2013.01); C08L 97/02 (2013.01); D01D 5/06 (2013.01); D01F 9/00 (2013.01); B29K 2033/20 (2013.01); B29L 2031/731 (2013.01);
Abstract
The invention relates to a method for the production of a precursor for the production of carbon—and activated carbon fibers according to the wet—or air-gap spinning method, in which a solution of lignin and a fiber-forming polymer in a suitable solvent is extruded through the holes of a spinning nozzle into a coagulation bath, the formed thread is stretched and subsequently treated, dried at an elevated temperature and then wound up. The lignin-containing thread is an economical starting material for the production of carbon—and activated carbon fibers.