1. Introduction Bentonite is an important non-metal mineral. Bentonite prod- ucts were usually divided into three kinds of products, ie native bentonite, active bentonite (alkaline, acidic treatment) and organic bentonite (organic treatment). Organic bentonite is an elaborated product of bentonite modification. Because of its high dispersity and emulsibility, organic bentonite, as a thickening, sediment- resistant and suspending agent, has been widely utilized for manufacture of paint, ink, oil drilling, cosmetic and pesticides.