The series of Activated Bleaching Clays is made from the Ca-based Bentonite that is rich of magnesium. After acidification process, this kind of clay has big specific area and more active acid center, which provide it strong absorbing and catalyzing ability. The series of Activated Bleaching Clays has been used widely in oil industry (the decolorization and purification of plant oil and animal ester), chemical industry, daily chemical industry (fancy soap) and grease industry (including lubricating oil, paraffin, naphthene acid and etc. ) and medicament industry.