zeolite adsorbents : Synthetic and natural crystalline alumino-silicates used as molecular sieves to purify gases in chemical processes and to adsorb water in a variety of other applications
The Association of Petrochemicals Producers in Europe (APPE), The European petrochemical industry, Glossary of Terms on Chemical Safety for Use in IPCS Publications, van Nieuwenhuyse, Brussels 2006. http://www.petrochemistry.eu/glossary.html, (Petrochem Ind - Brit) {473}