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US Patent 4178235 - Flotation recovery of pyrochlore
US Patent Issued on December 11, 1979
Estimated Patent Expiration Date:
June 30, 1998Estimated 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.
Estimated Patent Expiration Date:
June 30, 1998Estimated 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.AbstractPyrochlore, an economically important mineral source of niobium and tantalum, is recovered by flotation. Normally this requires numerous stages of concentrate cleaning because of the physical character of the froth, i.e., its consistency and stability.The use of 5-hydroxy quinoline as the collector/frother provides a froth with improved physical properties permitting a reduction of the required number of stages of flotation cleaning and improved recovery at a required concentrate grade. | InventorApplicationNo. 05/921116 filed on 06/30/1978US Classes:209/166With modifying agentsField of Search209/166, With modifying agents209/167PreferentialExaminersPrimary: Halper, RobertUS Patent References2875896, 2953569, 2959281, 3430765International ClassesB03D 1/004 (20060101)B03D 1/01 (20060101) |
