Graduate Seminars"Environmentally Benign Carbonylation"Professor Steven Chuang University of Akron Friday, December 10 - 11:00 am 1175 Benedum Hall The carbonylation reaction has been recognized as the most promising environmentally benign process to replace the conventional method of isocyanate synthesis from the reaction of phosgene with amines. However, lack of mechanistic understanding of the reaction has greatly hindered industry's capability to develop efficient catalysts for carbonylation. Intermediates for both homogeneous and heterogeneous carbonylation reactions have been studied by in situ infrared spectroscopy. Product desorption was found to be the rate-limiting step for the overall reaction process in gas-solid catalytic carbonylation while the formation of active intermediates is the rate-limiting step in gas-liquid homogeneous catalytic process. The reaction mechanism in both gas-solid and gas-liquid catalytic carbonylation as well as reactor design for these reaction processes will be discussed. |
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