Catalysts for chemical and biochemical processes; Catalysts for use in the manufacture of industrial chemicals; Chemical additives for oil well drilling fluid; Chemical additives for oils; Chemical adsorbents for removing impurities from fuel; Chemicals for industrial purposes; Chemicals for treating hazardous waste; Chemicals for use in industry; Chemicals for use in industry and science; Chemicals for use in the decontamination of polluted sites; Chemicals for use in the field of oil explor...