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(11)    Patent No :    AP 2273   
(21)    Application No :    AP/P/2008/004582   
(22)    Filing Date :    23.01.2007   
(24)    Date of Grant &    17.08.2011   
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
ZA    2006/00927    24.01.2006

(84)    Designated State

BW    GH   NA   ZM   ZW
(73) Applicant(s)

KIMLEIGH TECHNOLOGIES (PTY) LTD, 11 Jasper van der Westhuizen Street, Potchindustria, 2531, Potchefstroom, South Africa

(72) Inventors

VILJOEN Dawid Marthinus Louis, South Africa

LUBBE Leon, South Africa

(74) Representative


(51)  International  Classification   B01D 17/02 (2006.01)    B01D 19/00 (2006.01)
B01D 17/038 (2006.01)    B03D 1/014 (2006.01)

(54)    Title

Flotation process using an organometallic complex as activator.

(57)    Abstract

The invention provides a flotation process which includes the steps of providing a flotation mixture containing mineral values to be recovered and adding an activator to the flotation mixture, which activator may comprise a metal complex formed by a coordinating metal ion and a ligand. A particular aspect of the invention relates to the use of the metal complexes as activators. These complexes are stable over a wide pH range, which is not the

case with other inorganic compounds of which the applicant is aware, such as zinc sulphate, copper sulphate and manganese sulphate. The ligand may have

the structure R-(X)n, in which X may be selected from amines, carboxyls, phosphonates and sulphonates;R may be an organic group; and n may be 1

(56)    Documents Cited :    WO 02/22272 A   US 2 414 199 A


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