EP 3983605 A4 20230125 - HIGH ALPHA AND HIGH INTRINSIC VISCOSITY PULP PRODUCTION APPARATUSES, METHODS AND SYSTEMS
Title (en)
HIGH ALPHA AND HIGH INTRINSIC VISCOSITY PULP PRODUCTION APPARATUSES, METHODS AND SYSTEMS
Title (de)
VORRICHTUNGEN, VERFAHREN UND SYSTEME ZUR HERSTELLUNG VON ZELLSTOFF MIT HOHEM ALPHA-ANTEIL UND HOHER EIGENVISKOSITÄT
Title (fr)
APPAREILS, PROCÉDÉS ET SYSTÈMES DE PRODUCTION DE PÂTE À VISCOSITÉ INTRINSÈQUE ÉLEVÉE ET À ALPHA ÉLEVÉ
Publication
Application
Priority
IB 2019000599 W 20190614
Abstract (en)
[origin: WO2020249992A1] The high alpha and high Intrinsic Viscosity pulp production apparatuses, methods and systems (hereinafter "high-A high-IV pulp production") disclosed herein provide for pulp processing used in connection with Kraft Processes (KP) or Pre Hydrolysis Kraft Processes (PHKP), embodiments employing a Cold Caustic Extraction (CCE) stage and/or appropriate washing and bleaching stages, resulting in pulp with high Intrinsic Viscosity (IV) and high purity, such as may be as determined by alpha cellulose content, and adequate brightness for use downstream in applications such as high tensile regenerated cellulose and ether applications, or other applications employing high IV pulp with significant purity (e.g., alpha cellulose > 92%).
IPC 8 full level
D21C 1/06 (2006.01); D21C 3/02 (2006.01); D21C 9/18 (2006.01)
CPC (source: EP)
D21C 1/02 (2013.01); D21C 1/06 (2013.01); D21C 3/02 (2013.01); D21C 9/18 (2013.01)
Citation (search report)
[I] WO 2011138633 A1 20111110 - BAHIA SPECIALTY CELLULOSE SA [BR], et al
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 2020249992 A1 20201217; WO 2020249992 A9 20210311; BR 112021025188 A2 20220303; BR 112021025188 A8 20220315; CN 114096711 A 20220225; CN 114096711 B 20240419; EP 3983605 A1 20220420; EP 3983605 A4 20230125; EP 3983605 B1 20240904
DOCDB simple family (application)
IB 2019000599 W 20190614; BR 112021025188 A 20190614; CN 201980098368 A 20190614; EP 19932659 A 20190614