| 摘要 |
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. |
