Beneficiation with selective flocculation using hydroxamates
Patent 6041939 Issued on March 28, 2000. Estimated Expiration Date: 
March 20, 2018. 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.
March 20, 2018. 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 2660303 3701417 3808021 3826365 3837482 3857781 3862027 Method of beneficiating kaolin clay utilizing ammonium salts Purification of kaolin clay by froth flotation using hydroxamate collectors Novel collectors and processes for making and using same InventorsAssigneeApplicationNo. 045842 filed on 03/20/1998US Classes:209/5, Deflocculation and flocculation209/3, PRECEDENT PREPARATION OF ITEMS OR MATERIALS TO FACILITATE SEPARATION210/723, Utilizing precipitant, flocculant, or coagulant, each with accelerator or with each other or plural precipitants, flocculants, or coagulants423/23, Group IB metal (Cu, Ag, or Au)423/69, Group IVB metal (Ti, Zr, or Hf)423/155Alkaline earth metal (Mg, Ca, Sr, or Ba)ExaminersPrimary: Nguyen, Tan T.Attorney, Agent or FirmForeign Patent References
International ClassB03B 001/00AbstractA process which uses selective flocculation with hydroxamates for the beneficiation of mixtures of mineral particles (such as kaolin clays). The increased selectivity of hydroxamates for certain mineral phases within kaolin clays and other mixtures of mineral particles improves the process over selective flocculation processes utilizing other activators.Other References
Field of SearchPRECEDENT PREPARATION OF ITEMS OR MATERIALS TO FACILITATE SEPARATIONSelective differentiation Deflocculation and flocculation Group IB metal (Cu, Ag, or Au) Group IVB metal (Ti, Zr, or Hf) Alkaline earth metal (Mg, Ca, Sr, or Ba) Utilizing precipitant, flocculant, or coagulant, each with accelerator or with each other or plural precipitants, flocculants, or coagulants Utilizing organic precipitant Derived from alkyl halide or epihalophydrin reactant |
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