Crosslinked starches as depressants in mineral ore flotation
AssigneeAmerican Cyanamid Company
InventorsSim K. Lim, Richard M. Goodman
Life of this patent
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Abstract
Conventional starches are chemically crosslinked for use as selective depressants in the flotation of non-sulfide mineral ores. The process employing these crosslinked starches requires lower reagent dosages, exhibits improved selectivity and recovery and exerts a lower load on existing waste treatment facilities. The crosslinking agents employed are bifunctional and are used in sufficient quantities to result in 500 to 10,000 anhydroglucose units per crosslink.
Claims9
A process for depressing non-sulfide minerals in a flotation system which comprises adding to the flotation system, as a selective depressant, an effective amount of a crosslinked starch or starch-containing substance having from about 500 to 10,000 anhydroglucose units per crosslink.
Dependencies are inferred from the claim text.