EP 1028916 A1 20000823 - METHOD FOR MAKING CALCIUM CARBONATE
Title (en)
METHOD FOR MAKING CALCIUM CARBONATE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON CALCIUMKARBONAT
Title (fr)
PROCEDE DE FABRICATION DE CARBONATE DE CALCIUM
Publication
Application
Priority
- BE 9800171 W 19981106
- BE 9700894 A 19971106
Abstract (en)
[origin: WO9924361A1] The invention concerns a method for making calcium carbonate and/or calcium and magnesium carbonate particles, which consists in treating a basic pH aqueous medium containing Ca(OH)2 and/or Ca(OH)2-Mg(OH)2 by injecting therein gaseous CO2 to form calcium carbonate and/or calcium and magnesium carbonate, and recuperating the formed carbonate particles. The invention is characterised in that the treatment of the aqueous medium is carried out in the presence of at least an additive selected among the group consisting of hydrazine, hydroxylamine, hydroxylamine soluble salts, and their mixtures.
IPC 1-7
IPC 8 full level
C01F 5/24 (2006.01); C01F 11/18 (2006.01)
CPC (source: EP)
C01F 5/24 (2013.01); C01F 11/182 (2013.01); C01P 2004/61 (2013.01); C01P 2006/60 (2013.01); C01P 2006/80 (2013.01)
Citation (search report)
See references of WO 9924361A1
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9924361 A1 19990520; AR 017571 A1 20010912; AU 1015099 A 19990531; BE 1011538 A4 19991005; BR 9813975 A 20000926; EP 1028916 A1 20000823; PL 340094 A1 20010115; SK 6292000 A3 20001211; ZA 9810169 B 19990507
DOCDB simple family (application)
BE 9800171 W 19981106; AR P980105624 A 19981106; AU 1015099 A 19981106; BE 9700894 A 19971106; BR 9813975 A 19981106; EP 98952452 A 19981106; PL 34009498 A 19981106; SK 6292000 A 19981106; ZA 9810169 A 19981106