Method for preparing organophilic bentonite

The invention relates to a preparation method of organobentonite. Natural sodium-based bentonite or artificial Na-bentonite is used and dispersed by water; impurities are removed after centrifugal separation to prepare the raw material of sodium-based bentonite suspension; anion surface active agent with the concentration of 1 weight percent to 4 weight percent is added and mixed well; the quantity of the anion surface active agent is to make 0.5mol to 2mol of each gram of sodium-based montmorillonite in the suspension; the quantity of added precipitant is 0.5mol to 2mol so that the anion surface active agent can form the chemical and physical adsorption on the bentonite layer to prepare the organobentonite; thus hydrophobic precipitation is produced and separated. After ions are washed away, the hydrophobic precipitation is dried and smashed to get the separation, drying separated organobentonite. The XRD spectrum diagram of samples shows that the bentonite is in the state of being totally stripped and has b