Ethylene oxide production using fixed moderator concentration

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 301/10 (2006.01)

Patent

CA 2699156

A method for controlling ethylene oxidation uses ethylene and oxygen, in conjunction with a silver based catalyst, a moderator and a co-moderator, to form ethylene oxide. When controlling the ethylene oxidation reaction, the moderator concentration is maintained constant within a comparatively narrow operative concentration range and the co-moderator concentration is varied within a comparatively wider operative concentration range, to optimize a catalyst property such as the catalyst activity and/or the catalyst selectivity.

L'invention concerne un procédé de contrôle de l'oxydation de l'éthylène. Ce procédé utilise l'éthylène et de l'oxygène, conjointement avec un catalyseur à base d'argent, un modérateur et un co-modérateur, pour former de l'oxyde d'éthylène. Lors du contrôle de la réaction d'oxydation de l'éthylène, la concentration du modérateur est maintenue constante à l'intérieur d'une plage de concentration opératoire relativement étroite et la concentration de co-modérateur est amenée à varier à l'intérieur d'une plage de concentration opératoire comparativement plus large, pour optimiser une propriété du catalyseur telle que l'activité du catalyseur et/ou la sélectivité du catalyseur.

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