Global Patent Index - EP 3169843 A4

EP 3169843 A4 20180124 - METHOD AND CHEMICAL COMPOSITIONS TO IMPROVE EFFICIENCY OF CHEMICAL PULPING

Title (en)

METHOD AND CHEMICAL COMPOSITIONS TO IMPROVE EFFICIENCY OF CHEMICAL PULPING

Title (de)

VERFAHREN UND CHEMISCHE ZUSAMMENSETZUNGEN ZUR VERBESSERUNG DER EFFIZIENZ VON CHEMISCHEM AUFSCHLUSS

Title (fr)

PROCÉDÉ ET COMPOSITIONS CHIMIQUES D'AMÉLIORATION DE L'EFFICACITÉ DE RÉDUCTION EN PÂTE CHIMIQUE

Publication

EP 3169843 A4 20180124 (EN)

Application

EP 15822791 A 20150710

Priority

  • US 201414330958 A 20140714
  • US 2015039958 W 20150710

Abstract (en)

[origin: WO2016010854A1] The invention provides methods and compositions for enhancing the digestion of pulp in a chemical pulping process. The method uses ultra-low, economically feasible dosages of BH applied right before the pulping process begins, in a stable alkaline solution fed into white liquor line, to improve the process by saving pulping chemicals, increasing pulp brightness and yield and reducing the kappa number.

IPC 8 full level

D21C 3/02 (2006.01); D21C 3/22 (2006.01); D21C 11/00 (2006.01); D21H 21/32 (2006.01); D21C 9/10 (2006.01)

CPC (source: EP RU)

D21C 3/02 (2013.01 - EP RU); D21C 3/222 (2013.01 - EP); D21C 9/1084 (2013.01 - EP); D21C 11/0007 (2013.01 - EP)

Citation (search report)

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 2016010854 A1 20160121; BR 102014027199 A2 20160426; CA 2953568 A1 20160121; CL 2014003084 A1 20150109; CN 106536820 A 20170322; CN 106536820 B 20190705; EP 3169843 A1 20170524; EP 3169843 A4 20180124; RU 2017103170 A 20180815; RU 2017103170 A3 20181123; RU 2698735 C2 20190829

DOCDB simple family (application)

US 2015039958 W 20150710; BR 102014027199 A 20141030; CA 2953568 A 20150710; CL 2014003084 A 20141113; CN 201580038446 A 20150710; EP 15822791 A 20150710; RU 2017103170 A 20150710