EP 2350381 B1 20160817 - PROCESS TO PRODUCE PULP PAPER
Title (en)
PROCESS TO PRODUCE PULP PAPER
Title (de)
VERFAHREN ZUR HERSTELLUNG VON PAPIERZELLSTOFF
Title (fr)
PROCEDE DE FABRICATION DE PATE A PAPIER
Publication
Application
Priority
- IB 2009007208 W 20091023
- FR 0805907 A 20081024
Abstract (en)
[origin: WO2010046768A1] The invention relates to a method for manufacturing papermaking pulp, including: a step of refining wood, including an ozone treatment, so as to obtain a mechanical pulp; a deacidification step including placing the mechanical pulp in contact with a deacidification composition including at least one alkaline agent for more than an hour; and a bleaching step including placing the deacidified pulp in contact with a bleaching composition; wherein the pH varies by less than 0.2 points during the last 30 minutes of the deacidification step, and the pH is 6 to 10 at the end of the deacidification step.
IPC 8 full level
D21B 1/16 (2006.01); D21C 9/10 (2006.01); D21C 9/153 (2006.01)
CPC (source: EP US)
D21B 1/16 (2013.01 - EP US); D21C 9/10 (2013.01 - EP US); D21C 9/147 (2013.01 - EP US); D21C 9/153 (2013.01 - EP US)
Designated contracting state (EPC)
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 SE SI SK SM TR
DOCDB simple family (publication)
FR 2937656 A1 20100430; FR 2937656 B1 20101119; CA 2739694 A1 20100429; CA 2739694 C 20130528; CN 102197174 A 20110921; CN 102197174 B 20130424; EP 2350381 A1 20110803; EP 2350381 B1 20160817; JP 2012506501 A 20120315; JP 5275472 B2 20130828; RU 2445413 C1 20120320; US 2012118518 A1 20120517; WO 2010046768 A1 20100429
DOCDB simple family (application)
FR 0805907 A 20081024; CA 2739694 A 20091023; CN 200980142057 A 20091023; EP 09756054 A 20091023; IB 2009007208 W 20091023; JP 2011532732 A 20091023; RU 2011120788 A 20091023; US 200913125466 A 20091023