Froth flotation process

Details Froth flotation process Froth flotation process

B - Operations, Transporting

03

D

361/23

B03D 1/02 (2006.01)

Patent

CA 1159163

ABSTRACT Use of Phosphonic Acids as Collecting Agents in the Froth Flotation of Ores The invention concerns a process for concentra- ting mineral ores by froth flotation using as collecting agent a benzylphosphonic acid of formula I Image I wherein R1 is hydrogen, C1 to C6 alkyl, C1 to C6 halo- alkyl, C1 to C6 alkoxy or halogen, R2 is hydrogen, hydroxy, halogen or C1 to C6 alkyl and R3 is hydrogen or C1 to C6 alkyl, or R2 and R3 together form a methylene group. The process may be used for the flotation of a range of ores including ores of the metals tin, tungsten, and titanium, and is particularly useful in the flotation of the tin oxide ore cassiterite. Benzylphosphonic acid and .alpha.-hydroxybenzylphosphonic acid are particularly use- ful as collecting agents in the froth flotation of cassiterite.

366970

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