Method for preparing organic improved bentonite on basis of seepage prevention

The invention discloses a method for preparing organic improved bentonite on the basis of seepage prevention. The method includes steps of 1), dispersing sodium carbonate, N-N' methylene bisacrylamideand bentonite in water to obtain slurry and stirring the slurry for 10 min; 2), adding acrylic acid into the slurry and stirring the acrylic acid and the slurry for 20 min to obtain first mixtures; 3), placing the first mixtures in constant-temperature water bath, adding potassium persulfate into the constant-temperature water bath and stirring the first mixtures and the potassium persulfate for5 min to obtain second mixtures; 4), polymerizing the second mixtures at the constant temperatures for 2 h to fetch slurry, repeatedly washing and centrifuging the slurry and then drying the slurry toobtain the organic improved bentonite. The method has the advantages that the organic improved bentonite prepared by the aid of the method is obviously improved in the aspects of expansion indexes and seepage prevention perfor