No abstract

The first synthesis of CaO-CaCO 3 pillared clay is described. Ion exchange between acid montmorillonite K 10 and a Ca(OH) 2 solution ensures the incorporation of Ca ions into the gaps between the layers of the clay, leading to the formation of metal oxide (hydroxide) clusters, which increase the interlayer spacing in the clay. Air drying is accompanied by partial carbonation of the calcium oxide. The synthesized pillared clay is stable up to 300 ° C and has an interlayer spacing of Ӎ 16 Å and a specific surface of Ӎ 100 m 2 /g.