Froth flotation method for recovering metal values with polyhydroxy fatty acids
Patent 4455223 Issued on June 19, 1984. Estimated Expiration Date: 
September 9, 2002. 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.
September 9, 2002. 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 1912433 2012609 2023387 2099120 2120217 2362432 3859208 3909399 Process for beneficiation of non-sulfide iron ores Froth flotation of ores InventorApplicationNo. 06/416288 filed on 09/09/1982US Classes:209/167PreferentialExaminersPrimary: Nozick, BernardAttorney, Agent or FirmInternational ClassesB03D 1/004 (20060101)B03D 1/008 (20060101) AbstractAn improved method in concentration of oxide ores by froth flotation process which comprises subjecting a sufficiently fine sized ore of a metal which can change the valency state from lower to higher by the action of inorganic oxidizing compounds in the presence of an effective amount of a polyhydroxy fatty acid collector-frother; the indicated compounds provide selectivity and/or recovery of oxide minerals of iron, chromium, cerium, antimony, arsenic, titanium, zirconium, thorium, vanadium, niobium, tantalum, and wolfram, over silica and silicate gangue. | |
