Chemicals used in industry; catalysts for use in the manufacture of industrial chemicals; chemical absorbents for the treatment of gases and liquids; chemical absorbents for the removal of impurities from chemical process fluids; chemical absorbents for the removal of halogens, halides, metals, metal compounds, sulphur and/or sulphur compounds from hydrocarbons; chemical absorbents for the treatment of chemical process fluids in petroleum refineries or chemical refineries