Activated Clay Surface Modification with Stearic Acid and Characterization

The reaction of activated clay loaded with calcium hydroxide and stearic acid was used to modify acidic surface of activated clay for oleophylic surface,to get a kind of organic clay similar to organic bentonite.A single factor analysis was carried out in order to maximize the organic content of the product,by optimizing the reaction parameters such as the time of reaction,the temperature of reaction,the amount of stearic acid and the dosage of solvent,and the product had been characterizationed and used for exploration.The experimental results showed that 2.50g of activated clay loaded with calcium hydroxide,2.00g of stearic acid,50mL of carrier solvent,the temperature for 50℃ and a reaction time of 2.0h,under these conditions,the organic ignition loss of the product was 36.3%,reached the level of the traditional organic bentonite.XRD characterization showed that the stearic acid anion was intercalated between the 1ayers of activated clay and the layer spacing was expanded.SEM characterization showed that the partial stripping occurred in the bentonite,the product assumed the structure of flake,the thickness of slice was less than 100nm.The application experiment found that the organic clay adsorbed diesel which was 5.1 times the weight of itself.