EP 2753750 A4 20150422 - PROCESS FOR TREATING HARDWOOD BLACK LIQUOR AND HARDWOOD BLACK LIQUOR TREATED ACCORDING TO THE PROCESS
Title (en)
PROCESS FOR TREATING HARDWOOD BLACK LIQUOR AND HARDWOOD BLACK LIQUOR TREATED ACCORDING TO THE PROCESS
Title (de)
VERFAHREN ZUR BEHANDLUNG VON HARTHOLZSCHWARZLAUGE UND NACH DEM VERFAHREN BEHANDELTE HARTHOLZSCHWARZLAUGE
Title (fr)
PROCÉDÉ POUR LE TRAITEMENT DE LIQUEUR NOIRE DE BOIS DE FEUILLUS ET LIQUEUR NOIRE DE BOIS DE FEUILLUS TRAITÉE SELON LE PROCÉDÉ
Publication
Application
Priority
- SE 1150800 A 20110905
- SE 2012050907 W 20120828
Abstract (en)
[origin: WO2013036190A1] A process for treating a hardwood black liquor from the manufacturing of hardwood pulp in order to precipitate calcium compounds present in the liquor wherein the process comprises the steps of; providing a hardwood black liquor from the manufacturing of hardwood pulp and treating at least one part of said liquor at a temperature of above 160°C wherein the calcium compounds present in the black liquor will precipitate. The invention also relates to hardwood black liquor being treated according to the process.
IPC 8 full level
D21C 11/04 (2006.01); A21C 11/00 (2006.01); D21C 9/08 (2006.01)
CPC (source: CN EP)
D21C 9/08 (2013.01 - CN EP); D21C 11/00 (2013.01 - CN EP); D21C 11/106 (2013.01 - CN EP)
Citation (search report)
- [I] WO 0011263 A1 20000302 - AHLSTROM MACHINERY OY [FI], et al
- [A] WO 2005045126 A1 20050519 - BIOREGIONAL MINIMILLS UK LTD [GB], et al
- [A] WO 9945192 A1 19990910 - KEMIRA KEMI AB [SE], et al
- [A] US 2008277083 A1 20081113 - SHEVCHENKO SERGEY M [US], et al
- [A] WO 9851855 A1 19981119 - MO OCH DOMSJOE AB [SE], et al
- [A] GB 2065188 A 19810624 - DORR OLIVER INC
- [X] FREDERICK W J ET AL: "Preventing Calcium Carbonate Scaling in Black Liquor Evaporators (Part one of two)", SOUTHERN PULP AND PAPER MANUFACTURER, ATLANTA, GA, US, 1 August 1979 (1979-08-01), pages 22,24, XP008174221, ISSN: 0038-4488
- See references of WO 2013036190A1
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 2013036190 A1 20130314; BR 112014005055 A2 20170328; BR 112014005055 B1 20210112; CN 103842582 A 20140604; CN 107503213 A 20171222; EP 2753750 A1 20140716; EP 2753750 A4 20150422; EP 2753750 B1 20190306; ES 2729110 T3 20191030; PT 2753750 T 20190606
DOCDB simple family (application)
SE 2012050907 W 20120828; BR 112014005055 A 20120828; CN 201280043097 A 20120828; CN 201710860022 A 20120828; EP 12830388 A 20120828; ES 12830388 T 20120828; PT 12830388 T 20120828