Styrene monomer process based on oxidative dehydrogenation...

Details Styrene monomer process based on oxidative dehydrogenation... Styrene monomer process based on oxidative dehydrogenation...

C - Chemistry, Metallurgy

07

C

C07C 5/367 (2006.01) C07C 5/327 (2006.01)

Patent

CA 2723873

Processes are provided for the production of styrene monomer by oxidative dehydrogenation of EB using CO2 as a soft oxidant. Carbon dioxide is used as the reaction diluent in one or more dehydrogenation reactors and to supply the heat required for the endothermic reaction of EB to styrene monomer. In the dehydrogenation reactors, two parallel reactions for styrene monomer formation occur simultaneously: (1) direct EB dehydrogenation to styrene monomer over a catalyst using heat provided by the carbon dioxide, and (2) oxidative dehydrogenation of EB with carbon dioxide to form styrene monomer.

La présente invention concerne des procédés permettant la production de monomères de styrène par déshydrogénation oxydative de lEB à laide de CO2 comme oxydant doux. Le dioxyde de carbone est utilisé comme diluant réactionnel dans un ou plusieurs réacteurs de déshydrogénation et pour apporter la chaleur nécessaire à la réaction endothermique de lEB en monomère de styrène. Dans les réacteurs de déshydrogénation, deux réactions parallèles pour la formation de styrène se produisent simultanément : (1) la déshydrogénation directe de lEB en monomère de styrène sur un catalyseur utilisant la chaleur fournie par le dioxyde de carbone, et (2) la déshydrogénation oxydative de lEB avec le dioxyde de carbone pour former le monomère de styrène.

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