Enhanced Selectivity in Aromatic Chlorinations Through the Use of Improved ZSM-5 Zeolite Catalysts

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Abstract - Lund - 9727315 Prof. Carl R. F. Lund, of SUNY-Buffalo, will investigate the selective para-chlorination of toluene over ZSM-5 catalyst. This study on zeolite catalysis is relevant in the pharmaceutical, agrochemical, fine chemical, and basic chemical industries. The research will be focused on (a) the mechanism of liquid-phase chlorination by Cl2 and SO2Cl2 at low temperature, (b) the characterization of active sites, (c) the mechanism of deactivation, and (d) the improvement of ZSM-5 activity, selectivity and endurance. The characterization methods will include XRD, ICP-AES, IR, BET adsorption, and NH3 and SO2 adsorption and desorption. Adsorption calorimetry will provide information for the energy terms of a microkinetic model. Procedures for activity recovery --such as oxidation or solvent extraction-- and for activity maintenance --such as cyclic operation-- will be investigated. Two graduate students will be involved in the research; knowledge transfer to undergraduate courses will occur by means of new problems for kinetics and reactor design courses.