EP 2914774 A4 20160629 - PREFLOCCULATION OF FILLERS USED IN PAPERMAKING
Title (en)
PREFLOCCULATION OF FILLERS USED IN PAPERMAKING
Title (de)
VORAB-AUSFLOCKUNG VON FÜLLSTOFFEN IN DER PAPIERHERSTELLUNG
Title (fr)
PRÉFLOCULATION DE CHARGES UTILISÉES DANS LA FABRICATION DE PAPIER
Publication
Application
Priority
- US 201213665963 A 20121101
- US 2013065732 W 20131018
Abstract (en)
[origin: WO2014070488A1] A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of microparticle prior to, simultaneous to, and/or after addition of a first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the microparticle and/or the first flocculating agent is added.
IPC 8 full level
D21H 17/28 (2006.01); D21H 17/41 (2006.01); D21H 17/63 (2006.01); D21H 17/67 (2006.01)
CPC (source: EP)
D21H 17/28 (2013.01); D21H 17/37 (2013.01); D21H 17/45 (2013.01); D21H 17/67 (2013.01); D21H 21/10 (2013.01)
Citation (search report)
- [XYI] US 2009267258 A1 20091029 - CHENG WEIGUO [US], et al
- [XYI] US 2012199304 A1 20120809 - CHENG WEIGUO [US], et al
- [Y] WO 9746591 A1 19971211 - WESTON FOODS LTD [AU], et al
- [A] CA 1306084 C 19920811 - GRAIN PROCESSING CORP [US]
- [A] US 4799964 A 19890124 - HARVEY RICHARD D [US], et al
- [A] DE 4436317 A1 19960418 - NALCO CHEMICAL CO [US]
- [A] EP 0534656 A1 19930331 - NALCO CHEMICAL CO [US]
- [A] EP 0261820 A1 19880330 - DU PONT [US]
- [A] EP 0050316 A1 19820428 - GASCOGNE PAPETERIES [FR]
- See references of WO 2014070488A1
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 2014070488 A1 20140508; AR 093258 A1 20150527; BR 112015007883 A2 20170704; BR 112015007883 A8 20190827; BR 112015007883 B1 20220329; CA 2885582 A1 20140508; CA 2885582 C 20201027; CN 104755673 A 20150701; CN 104755673 B 20171215; EP 2914774 A1 20150909; EP 2914774 A4 20160629; JP 2015533392 A 20151124; JP 6300815 B2 20180328; KR 102134248 B1 20200715; KR 20150079932 A 20150708; TW 201439401 A 20141016; TW I487823 B 20150611
DOCDB simple family (application)
US 2013065732 W 20131018; AR P130103938 A 20131029; BR 112015007883 A 20131018; CA 2885582 A 20131018; CN 201380057398 A 20131018; EP 13850762 A 20131018; JP 2015540693 A 20131018; KR 20157014376 A 20131018; TW 102137464 A 20131017