Organic bentonite was prepared from natural Ca base bentonite.The latter was first treated with sodium carbonate, and then was covered with cetyl trimethyl ammonium bromide.

• 以天然钙基膨润土为原料,经碳酸钠钠化后,用溴代十六烷基三甲胺进行有机包覆,制得有机膨润土;