Compositions – Physical separation agents – Froth-flotation or differential adherence
Patent
1986-01-08
1987-04-28
Wax, Robert A.
Compositions
Physical separation agents
Froth-flotation or differential adherence
2605024R, 558 73, 558186, C07F 930, C09K 300
Patent
active
046612785
ABSTRACT:
A process for the beneficiation of base metal sulfide mineral values from base metal sulfide ores with selective rejection of gangue sulfide minerals at pH values below about 10.0 by froth flotation is disclosed. The process includes the use of a new and improved collector which at pH values below about 10.0 exhibits unexpectedly high collector activity for base metal sulfide minerals of copper, nickel, molybdenum, cobalt and zinc and selectively rejects gangue sulfide minerals such as pyrite and pyrrhotite. The collector for base metal sulfide mineral values for use in the process comprises at least one diorganomonothiophosphinate compound having the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each, independently, selected from saturated and unsaturated hydrocarbyl radicals, alkyl polyether radicals, and aromatic radicals, and such radicals, optionally and independently, substituted with polar groups selected from halogen, nitrile and nitro groups; or wherein R.sup.1 and R.sup.2 together form a heterocyclic ring having the formula: ##STR2## wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are each, independently, selected from hydrogen and C.sub.1 to C.sub.12 alkyl groups; and X is selected from hydrogen, an alkali or alkaline earth metal and NH.sub.4 groups. The collectors and process provide excellent metallurgical recoveries of copper sulfide mineral values of high grade at a substantial reduction in lime consumption and reagents costs associated with prior art flotation separation methods. An improved process for Cu-Mo separation is also disclosed.
REFERENCES:
patent: 1593232 (1926-07-01), Whitworth
patent: 2919025 (1959-12-01), Booth et al.
patent: 3317040 (1967-05-01), Booth
patent: 3401185 (1968-09-01), Meinhardt
Solozhenkin et al., "Flotation Properties of Sulfur-Containing Phosphorus Derivatives," Dokl. Akad. Nauk Tadzh. SSR, 13(4), 26-30 (1970).
Mastryukova et al., "Reaction of Monothio Acids of Phosphorus with Diazoacetic Ester," Zh. Obshch. Khim. 1981, 51(7), 1475-1477, (CA 95:204068z).
Nagaraj D. R.
Wang Samuel S.
American Cyanamid Company
VanRiet Frank M.
Wax Robert A.
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