EP 2751333 A1 20140709 - PULPING PROCESSES
Title (en)
PULPING PROCESSES
Title (de)
AUFSCHLUSSVERFAHREN
Title (fr)
PROCÉDÉS DE RÉDUCTION EN PÂTE DE CELLULOSE
Publication
Application
Priority
- US 201161529211 P 20110830
- US 2012053124 W 20120830
Abstract (en)
[origin: WO2013033386A1] A pulping process comprises using a high concentration of anthraquinone (AQ). The pulping process is capable of providing a pulp having low Kappa number with unexpectedly high strength. The pulping process can use wood or non-wood fibers (e.g., bagasse and corn stover) to provide pulp having good papermaking quality. The method for pulping a fiber comprising cooking a first mixture comprising the fibers, water, an alkali, and a delignification selectivity enhancing chemical for a cooking time and at a cooking condition sufficient to form a first pulp having a desired Kappa number of about 15 or less, and strength parameters that are sufficient for papermaking, where the starting material prior to cooking has a Kappa number of 60 or greater.
IPC 8 full level
D21C 3/02 (2006.01)
CPC (source: EP US)
D21C 3/003 (2013.01 - US); D21C 3/02 (2013.01 - EP US); D21C 3/222 (2013.01 - EP US); D21C 5/00 (2013.01 - EP US); D21C 9/14 (2013.01 - EP US); D21H 17/74 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013033386 A1 20130307; AR 088750 A1 20140702; AU 2012301895 A1 20140227; BR 112014004303 A2 20170321; CA 2846640 A1 20130307; CN 103764903 A 20140430; CO 6890094 A2 20140310; EP 2751333 A1 20140709; EP 2751333 A4 20150429; IN 1515CHN2014 A 20150508; KR 20140068095 A 20140605; MX 2014002364 A 20140414; US 2014174680 A1 20140626; US 2015129143 A1 20150514; ZA 201401307 B 20170531
DOCDB simple family (application)
US 2012053124 W 20120830; AR P120103180 A 20120829; AU 2012301895 A 20120830; BR 112014004303 A 20120830; CA 2846640 A 20120830; CN 201280042410 A 20120830; CO 14046119 A 20140304; EP 12828244 A 20120830; IN 1515CHN2014 A 20140225; KR 20147007918 A 20120830; MX 2014002364 A 20120830; US 201214240489 A 20120830; US 201414522476 A 20141023; ZA 201401307 A 20140220