Oxidizing method in froth flotation of minerals
Patent 3951786 Issued on April 20, 1976. Estimated Expiration Date: 
April 20, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 20, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1364306 1364858 1548351 1852109 2410377 2922522 3669266 InventorApplicationNo. 465408 filed on 04/30/1974US Classes:209/166With modifying agentsExaminersPrimary: Halper, RobertAbstractAn improved method in concentration of oxide ores and minerals by froth flotation process which comprises subjecting a pulp of mineral slurry to the combined action of a organic nitrogen compound with one or more NH2 group and hypochlorite in a slightly acid pulp of mineral slurry. The decomposition of the NH2 group provokes a highly oxidizing state in the mineral slurry, a state which can change the valency state of any metal which can change the valency state from lower to higher of the metal at the mineral surface, thus rendering the mineral particle to be capable of activating the double carbon to carbon bonds of certain collectors possessing these bonds as are olefine alcohols or olefine glycols. The indicated compounds provide recovery of oxide minerals of iron, antimony, cerium, yttrium titanium and thorium, vanadium, niobium, tantalum, chromium, and wolfram. | |
