C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/146
C22B 34/34 (2006.01) C01G 39/00 (2006.01) C22B 3/26 (2006.01) C22B 3/30 (2006.01)
Patent
CA 1085619
ABSTRACT OF THE DISCLOSURE Molybdenum is selectively extracted from an aqueous solution containing molybdenum and various other metal values, e.g. copper, arsenic, iron, bismuth, antimony, tin, and lead. The molybdenum- bearing solution is adjusted to a pH of about 2.0 or less, and then intimately contacted with an organic extracting solution containing an alpha-hydroxy oxime. The loaded organic phase, containing extracted molyb- denum values, is separated from the aqueous raffinate, and the molybdenum values contained in the organic phase are stripped therefrom using an aqueous stripping solution containing ammonium hydroxide. In order to increase the efficiency with which the molybdenum is stripped from the loaded organic solution, nonylphenol is added to the organic solution. The nonylphenol can be added to the system at any time prior to the stripping step, e.g. it can be added to the organic solution before the extraction step, or it can be added to the aqueous-organic mixture during the extraction step ( in which case it reports to the organic phase), or it can be added to the organic solution just prior to the stripping step.
265251
Clark Don R.
Wells Barry A.
Kennecott Copper Corporation
Kirby Eades Gale Baker
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