Global Patent Index - EP 1202932 A1

EP 1202932 A1 20020508 - METHOD FOR PRODUCING BARIUM SULFATE, BARIUM SULFATE AND THE UTILIZATION THEREOF

Title (en)

METHOD FOR PRODUCING BARIUM SULFATE, BARIUM SULFATE AND THE UTILIZATION THEREOF

Title (de)

VERFAHREN ZUR HERSTELLUNG VON BARIUMSULFAT, BARIUMSULFAT UND VERWENDUNG DES BARIUMSULFATS

Title (fr)

PROCEDE DE PRODUCTION DE SULFATE DE BARYUM, SULFATE DE BARYUM AINSI PRODUIT ET UTILISATION DE CE DERNIER

Publication

EP 1202932 A1 20020508 (DE)

Application

EP 00922585 A 20000331

Priority

  • DE 19926216 A 19990609
  • EP 0002872 W 20000331

Abstract (en)

[origin: WO0076919A1] The invention relates to a method for the continuos production of micro-crystalline lead sulfate particles, whereby a barium salt solution and a sulfate solution are simultaneously brought into contact with each other in a precipitating suspension and constantly stirred, the precipitating suspension is continuously removed and the barium sulfate precipitation is filtered and washed. In order to produce flake-shaped and/or needle-shaped barium sulfate particles, the barium salt solution concentration ranges between 0.1 to 0.8 Ba<2+> mol/l and the sulfuric acid concentration ranges between 0.1 to 2.0 SO4<2->mol/l, whereby throughput and stirring speeds are adjusted at a constant precipitation volume in such a way that a pH value of 1 to 9 is obtained in the precipitating suspension.

IPC 1-7

C01F 11/46

IPC 8 full level

C01F 11/46 (2006.01)

CPC (source: EP US)

C01F 11/462 (2013.01 - EP US); C01P 2004/10 (2013.01 - EP US); C01P 2004/20 (2013.01 - EP US); C01P 2004/54 (2013.01 - EP US); C01P 2004/61 (2013.01 - EP US); C01P 2004/62 (2013.01 - EP US)

Citation (search report)

See references of WO 0076919A1

Designated contracting state (EPC)

BE DE FR GB IT NL

DOCDB simple family (publication)

WO 0076919 A1 20001221; AU 4292400 A 20010102; CA 2374726 A1 20001221; DE 19926216 A1 20010222; EP 1202932 A1 20020508; US 2005180912 A1 20050818; US 7501110 B2 20090310

DOCDB simple family (application)

EP 0002872 W 20000331; AU 4292400 A 20000331; CA 2374726 A 20000331; DE 19926216 A 19990609; EP 00922585 A 20000331; US 7777505 A 20050311