... free acid .Mainly used to refine edible animal and vegetable oil. strong decoloring-ability and good adsorption,higher in activity degreeHigh ... ,It is applicable to refine oil ,used in soya bean oil,sunflower oil,corn oil,plam oil,castor oil,cotten seed oil,sung oil ,mineral oil,Lubricating oil ,olefin, paraffin wax Vaseline ...