Method for beneficiating discolored kaolin to produce high brightness coating clay
Patent 5685900 Issued on November 11, 1997. Estimated Expiration Date: 
October 18, 2015. 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.
October 18, 2015. 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 3477809 3586523 3627678 3701417 3808021 3837482 3857781 Methods of clay benefication Anhydrous kaolin clay pigment and method of preparation Method of beneficiating kaolin clay utilizing ammonium salts InventorsAssigneeApplicationNo. 546398 filed on 10/18/1995US Classes:106/487, Organic material containing106/488, Bleaching treatment or product209/5, Deflocculation and flocculation209/10, TREATMENT SUBSEQUENT209/39, Magnetic and fluid suspension252/186.21, Plural oxidants252/187.26, Sodium423/118.1, Aluminosilicate other than zeolite501/148Using organic substance as treating agentExaminersPrimary: Marcheschi, MichaelAttorney, Agent or FirmForeign Patent References
International ClassesB03D 003/06C04B 033/04 C04B 033/10 AbstractA method for beneficiating a low brightness fine particle size discolored kaolin crude to produce a high brightness coating clay. By combining the two beneficiating techniques of selective flocculation and ozonation, a synergistic phenomena occurs and a clay product of superior brightness and whiteness can be obtained from fine discolored clays that cannot be achieved by beneficiation with either process singularly. By passing the flocced clay through ozonation, the flocculant polymer left in the clay can be completely destroyed.Field of SearchClay or material derived therefrom containingOrganic material containing Bleaching treatment or product Plural oxidants Sodium Deflocculation and flocculation TREATMENT SUBSEQUENT Magnetic and fluid suspension Chemical pretreatment Using organic substance as treating agent Aluminosilicate other than zeolite |
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