42 engineering, product development and technical consultation and research in the field of reduction of sulfur and sulfur-containing compounds from liquids, gases, natural gas, industrial oils and petrochemicals; advise and provision of technical information relating to the reduction of sulfur from liquids, gases, natural gas, industrial oils and petrochemicals; chemical plant operation services; consultancy and use in manufacture of liquids, gases, natural gas, industrial oils and petrochemicals relating to reduction of sulfur; consultancy and technical information relating to provision, installation, operation and disposable of catalysts