Global Patent Index - EP 0905265 B1

EP 0905265 B1 20010516 - Method of reducing water quantity in slurries of oxidic nickel ores by injection of acrylic flocculant

Title (en)

Method of reducing water quantity in slurries of oxidic nickel ores by injection of acrylic flocculant

Title (de)

Verfahren zur Reduzieung der Wassermenge in nickeloxidhaltigen Erzschlämmen durch Injektion akrylsaurer Flockungsmittel

Title (fr)

Procédé pour diminuer la quantité d'eau contenue dans les pulpes de minerais nickelifères oxydés par injection d'un floculant acrylique

Publication

EP 0905265 B1 20010516 (FR)

Application

EP 98401810 A 19980717

Priority

FR 9710075 A 19970806

Abstract (en)

[origin: FR2767143A1] Method for reducing water content of mineral nickel iron oxide pulps comprises diluting pulp with water; and injecting flocculant based on acrylic acid copolymer. Method for reducing water content of mineral nickel iron oxide pulps comprises successively diluting pulp with water to concentration less than 150 g, preferably less than 80 g solid l<-1>; injecting diluted pulp with dilute aqueous solution of preferably less than 0.5 gl<-1> organic flocculant based on weakly anionic copolymer derived from acrylic acid with average molecular weight = 2\*10<6> - 3\*10<6> in doses of 50-1000 g per ton of dry material in pulp, to obtain upper layer containing 100 mg l<-1> solid and lower layer containing 300-450 g l<-1> solid; and then separating the two layers.

IPC 1-7

C22B 23/00; B03D 3/06; B03B 7/00; C22B 1/00

IPC 8 full level

C02F 1/52 (2006.01); B03B 7/00 (2006.01); B03D 3/00 (2006.01); B03D 3/06 (2006.01); C02F 1/56 (2006.01); C02F 11/12 (2006.01); C22B 1/00 (2006.01); C22B 23/00 (2006.01)

CPC (source: EP US)

B03B 7/00 (2013.01 - EP US); B03D 3/06 (2013.01 - EP US); C22B 1/00 (2013.01 - EP US); C22B 23/005 (2013.01 - EP US); C22B 23/0453 (2013.01 - EP US)

Designated contracting state (EPC)

FR GB GR

DOCDB simple family (publication)

FR 2767143 A1 19990212; AU 734060 B2 20010531; AU 7856498 A 19990218; BR 9806526 A 20010320; CA 2243608 A1 19990206; CA 2243608 C 20070327; CO 5050374 A1 20010627; CU 22787 A3 20020724; EP 0905265 A1 19990331; EP 0905265 B1 20010516; GR 3036112 T3 20010928; ID 20683 A 19990211; JP 4369541 B2 20091125; JP H11124640 A 19990511; OA 10827 A 20030129; RU 2209775 C2 20030810; US 6090293 A 20000718; YU 29998 A 19991122; YU 49309 B 20050610

DOCDB simple family (application)

FR 9710075 A 19970806; AU 7856498 A 19980729; BR 9806526 A 19980805; CA 2243608 A 19980715; CO 98045320 A 19980806; CU 1998115 A 19980805; EP 98401810 A 19980717; GR 20010400962 T 20010622; ID 981078 A 19980803; JP 23113298 A 19980804; OA 9800132 A 19980806; RU 98115385 A 19980805; US 12817898 A 19980803; YU 29998 A 19980715