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Molecular sieves or zeolites are important widespread industrial materials of unique chemical structure, which are used in most industrial plants as an adsorbent for gases or even as catalysts. Zeolite 4A was prepared from Iraqi kaolin using the ion exchange technique to insert a sodium ion in to the kaolin structure. It was characterized by X-ray diffraction and tested for water adsorption capacity to test the reliability of kaolin as a raw material for zeolite production, and this seems to bedoi:10.1016/j.jaubas.2010.12.002 fatcat:t3votpbxifbyrmetbi3t7dsesu