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(11)    Patent No :    AP 2601   
(21)    Application No :    AP/P/2009/004885   
(22)    Filing Date :    12.11.2007   
(24)    Date of Grant &    25.02.2013   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
BR    PI 0612374-0    10.11.2006

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
 

(73) Applicant(s)

COMPANHIA VALE DO RIO DOCE, BR 262 - KM 296 Distrito

De Santa Luzia - Minas Gerais 33030-970,
Brazil
(72) Inventors

MENDES Flávia Dutra, Brazil

(74) Representative

ADAMS AND ADAMS MOZAMBIQUE

MOZAMBIQUE
 

(51)  International  Classification   C22B 3/00 (2006.01)    C22B 23/00 (2006.01)
B01J 39/00 (2006.01)   
(54)    Title

Process for recovery of nickel and cobalt from laterite ores using ion exchange resin

(57)    Abstract

The process, according to the invention, comprises the following stages: (a) processing (1) of the laterite (O) ore by crushing, scrubbing, attrition, separation, and high-intensity magnetic separation; (b) Leaching (2) of the non-magnetic fraction (CN) obtained from the previous stage (a); (c) optionally, neutralization (3) of the effluent from the leaching and/or

solid-liquid separation stages (4); (d) treatment of the effluents from stages
(b) or (c) using an ion-exchange hybrid system (5) comprising at least one

circuit for removal of impurities and at least one circuit for recovery of nickel and cobalt; (e) elution (6) of the ion-exchange resin used; (f) separation,

purification, and recovery (7) of the nickel and cobalt

(56)    Documents Cited :    RU 2156315 C1    CA 2538962 A1    WO 02/08477 A1

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