Method of beneficiating kaolin clay utilizing ammonium salts
Patent 4604369 Issued on August 5, 1986. Estimated Expiration Date: 
August 27, 2004. 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.
August 27, 2004. 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 2710244 3371988 3701417 3857781 Processing of kaolinitic clays at high solids Patent #: 4186027 InventorAssigneeApplicationNo. 06/644614 filed on 08/27/1984US Classes:501/148, Using organic substance as treating agent209/5, Deflocculation and flocculation423/118.1, Aluminosilicate other than zeolite501/146Chemical pretreatmentExaminersPrimary: Dixon, William R. Jr.Assistant: Capella, Steven Attorney, Agent or FirmInternational ClassesB03D 3/06 (20060101)B03D 3/00 (20060101) C09C 1/40 (20060101) C09C 1/42 (20060101) AbstractA method of enhancing the brightness (beneficiating) of kaolin clays by removing titanium impurities is disclosed. The claimed method is a selective flocculation process wherein clay solids are blunged (dispersed) in water together with a dispersing agent and an ammonium salt conditioning agent. When a water-dispersible anionic polymer is added to the dispersed and conditioned clay suspension, titanium flocs are separated from the suspension yielding a whiter kaolin clay product. Unlike prior art selective flocculation processes, the use of highly-dilute dispersions and/or multiple washing steps is not required.Field of SearchUsing organic substance as treating agent |
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