Method of activation of clay and activated clay

Details Method of activation of clay and activated clay Method of activation of clay and activated clay

C - Chemistry, Metallurgy

04

B

C04B 35/04 (2006.01) A01K 1/015 (2006.01) C01B 33/40 (2006.01) C01B 33/44 (2006.01) C04B 14/10 (2006.01) C09K 8/22 (2006.01)

Patent

CA 2156340

A method for activating smectite clays to give swelling power and/or dispersibility in an aqueous electrolyte solution and resulting activated smectite clays are disclosed, the method comprising previously adding an adequate amount of an aprotic polar solvent having a higher relative permittivity than those of alcohols (e.g., N,N- dimethylformamide, N,N-dimethylacetamide, ethylene carbonate, propylene carbonate or dimethyl sulfoxide) to an aqueous electrolyte solution in which the clays (or the clays previously suspended) are to be swollen and/or dispersed, or treating the clays to be swollen and/or dispersed with the compound.

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