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(11)    Patent No :    AP 2596
(21)    Application No :    AP/P/2009/004923   
(22)    Filing Date :    18.12.2007   
(24)    Date of Grant &    18.02.2013   
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
US    60/882,376    28.12.2006
a(84)    Designated State

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

(73) Applicant(s)

MOLYCORP MINERALS, LLC, HC1 Box 224, Mountain Pass,

CA 92366,
United States of America
(72) Inventors

BURBA John L III, United States of America HASSLER Carl R, United States of America O'KELLEY C Brock, United States of America et al

(74) Representative


(51)  International  Classification   B01J 39/00 (2006.01)    C02F 1/42 (2006.01)
(54)    Title

Method and apparatus for recovering a metal and seperating arsenic from an arsenic containing solution

(57)    Abstract

A method and apparatus for recovering a metal and separating arsenic from an arsenic-containing solution. The method includes contacting the

arsenic-containing solution with a fixing agent that comprises a rare earth compound to produce an arsenic-depleted solution and an arsenic-laden fixing

agent. The fixing agent comprises a rare earth-containing compound that can include cerium, lanthanum, or praseodymium. The fixing agent is separated from the arsenic-depleted solution and a recoverable metal is separated from one or more of the arsenic-containing solution and the arsenic-depleted solution. Recoverable metals can include metal from Group IA, Group IIA, Group VIII and the transition metals. The arsenic-containing solution can be formed by contacting an arsenic-containing material with a leaching agent. Arsenic-depleted solids formed during the leach can also be separated and recovered. An apparatus of the invention can include two or more arsenic

(56)    Documents Cited :    US 2006/207945 A1    US 6 666 903 B1


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