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:
May. 12, 2020
Filed:
Dec. 28, 2017
Applicant:
Lenzing Aktiengesellschaft, Lenzing, AT;
Inventors:
Herbert Sixta, Lenzing, AT;
Andrea Promberger, Ottnang, AT;
Andrea Borgards, Steinbach, AT;
Roland Möslinger, Zell am Pettenfirst, AT;
Assignee:
Lenzing Aktiengesellschaft, Lenzing, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C 1/02 (2006.01); D21C 9/00 (2006.01); D21C 9/08 (2006.01); C08B 37/14 (2006.01); D21C 3/22 (2006.01); D21C 3/02 (2006.01);
U.S. Cl.
CPC ...
D21C 1/02 (2013.01); C08B 37/14 (2013.01); D21C 3/22 (2013.01); D21C 9/001 (2013.01); D21C 9/002 (2013.01); D21C 9/004 (2013.01); D21C 9/08 (2013.01); D21C 3/02 (2013.01);
Abstract
The invention relates to a process for producing a dissolving pulp from a cellulosic starting material using the kraft process, comprising the step of cooking the starting material with a cooking liquor. The process according to the invention characterized in that the starting material is exposed to a steam treatment prior to cooking and that the pulp obtained by cooking is subjected to cold caustic extraction (CCE) in the course of further processing.