EP 0616602 A4 19960717 - PROCESS FOR PRODUCING A CARBONATE COMPOSITION.
Title (en)
PROCESS FOR PRODUCING A CARBONATE COMPOSITION.
Publication
Application
Priority
- US 9210740 W 19921211
- US 80671791 A 19911212
Abstract (en)
[origin: WO9312038A1] A process and apparatus for obtaining a sodium hydroxide solution and slurry of calcium carbonate particles for use as paper coating includes the step of reacting calcium hydroxide and sodium carbonate in causticizer (6). The resulting slurry is dewatered in a centrifuge (14), and the particles are classified in centrifuge (35). The coarse fraction is separated and comminuted in a grinder (45), and the ground particles are recycled to the mixing tank (33) for combination with fresh slurry. The calcium carbonate product is concentrated in evaporator (39) and transferred to a storage tank (37).
IPC 1-7
IPC 8 full level
C01D 1/22 (2006.01); C01F 11/18 (2006.01); C09C 1/02 (2006.01); D21H 21/52 (2006.01)
CPC (source: EP)
C01D 1/22 (2013.01); C01F 11/185 (2013.01); C09C 1/021 (2013.01); D21H 21/52 (2013.01); C01P 2004/52 (2013.01); C01P 2004/53 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 9312038A1
Designated contracting state (EPC)
BE DE DK FR GR IT NL SE
DOCDB simple family (publication)
WO 9312038 A1 19930624; AU 3277193 A 19930719; CA 2125695 A1 19930624; EP 0616602 A1 19940928; EP 0616602 A4 19960717; FI 942797 A0 19940613; FI 942797 A 19940725; NO 942218 D0 19940613; NO 942218 L 19940728
DOCDB simple family (application)
US 9210740 W 19921211; AU 3277193 A 19921211; CA 2125695 A 19921211; EP 93901327 A 19921211; FI 942797 A 19940613; NO 942218 A 19940613