Thermally Stable and Acidic Iron Oxide Pillared Clay

Abstract

Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar-364 002 Manuscript received 23 March 1992, revised 7 September 1992, accepted 10 November 1992 Iron oxide pillared clay was prepared by Interaction of bentonite with partially hydrolysed ferric chloride solution. The product was characterised by XRD and surface area (SA) measurement Basal spacing and SA of the product, after calcination at 300^º, were found to be 14.7 Å and 204 m² g-¹ respectively. It retained high SA (140 m² g-¹) even after heating at 500^º for 2 h. Stepwise pyridine desorption study Indicated that the clay retained high percentage (5%) of pyridine even after heatina to 400^º.