EP 0000415 B1 19810429 - PROCESS FOR THE PREPARATION OF AQUEOUS SUSPENSIONS CONTAINING AT LEAST 65% BY WEIGHT OF CALCIUM CARBONATE
Title (en)
PROCESS FOR THE PREPARATION OF AQUEOUS SUSPENSIONS CONTAINING AT LEAST 65% BY WEIGHT OF CALCIUM CARBONATE
Publication
Application
Priority
LU 77723 A 19770711
Abstract (en)
[origin: ES471586A1] Process for the preparation of an aqueous suspension containing at least 65% by weight of calcium carbonate, in which process calcium carbonate is crystallized in a dilute aqueous medium, a wet concentrate of calcium carbonate is separated from the resulting dilute aqueous suspension of calcium carbonate and the said calcium carbonate concentrate is fluidized and homogenized in the presence of a dispersing agent. The calcium carbonate is crystallized in the presence of a water-soluble polyelectrolyte and the calcium carbonate concentrate is separated from the dilute suspension of calcium carbonate by essentially mechanical separating means.
IPC 1-7
IPC 8 full level
C01F 11/18 (2006.01); C09C 1/02 (2006.01); C09D 17/00 (2006.01); D21H 19/38 (2006.01); D21H 19/52 (2006.01)
CPC (source: EP US)
C01F 11/182 (2013.01 - EP US); C01F 11/183 (2013.01 - EP US); C01F 11/185 (2013.01 - EP US); C09C 1/021 (2013.01 - EP US); C09D 17/004 (2013.01 - EP US); D21H 19/385 (2013.01 - EP US); D21H 19/52 (2013.01 - EP US); C01P 2004/51 (2013.01 - EP US); C01P 2004/61 (2013.01 - EP US); C01P 2004/62 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE FR GB LU NL SE
DOCDB simple family (publication)
EP 0000415 A1 19790124; EP 0000415 B1 19810429; AT 372695 B 19831110; AT A496878 A 19830315; BG 49609 A3 19911216; DE 2860643 D1 19810806; DK 308478 A 19790112; ES 471586 A1 19790116; FI 62272 B 19820831; FI 62272 C 19821210; FI 781991 A 19790112; IN 147648 B 19800517; IT 1099568 B 19850918; IT 7825558 A0 19780711; JP S5418498 A 19790210; JP S6317771 B2 19880415; LU 77723 A1 19790326; US 4242318 A 19801230
DOCDB simple family (application)
EP 78200085 A 19780707; AT 496878 A 19780710; BG 4005178 A 19780612; DE 2860643 T 19780707; DK 308478 A 19780710; ES 471586 A 19780710; FI 781991 A 19780621; IN 448DE1978 A 19780615; IT 2555878 A 19780711; JP 8140778 A 19780704; LU 77723 A 19770711; US 92319578 A 19780710