REACTIONS OF ZEOLITES WITH VOLATILE-HALID ES, 6 - IR-SPECTROSCOPIC STUDY OF ADSORPTION AND REACTIONS OF METHYL-CHLORIDE ON ACIDIC, NEUTRAL AND BASIC ZEOLITES

IR spectroscopic investigations were performed of the adsorption and s urface reactions of CH3Cl over acidic, basic and neutral zeolite catal ysts. In each case, the spectral changes reflected the appearance of t he Fermi resonance phenomenon. The resonance parameters determined poi nted to a decreasing extent of resonance in consequence of the adsorpt ion. No influence of the acidity of the adsorbents was observed. The f ormation and consumption of HCl and OH groups were established at elev ated temperatures. The reactions assumed to have occurred are describe d and explained.