Method and apparatus for sequestering entrained and volatile...

C - Chemistry – Metallurgy – 07 – C

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C07C 51/12 (2006.01) C07C 51/47 (2006.01) C07C 53/08 (2006.01)

Patent

CA 2418073

A method and apparatus for sequestering or volatile catalyst species in a carbonylation process includes contacting the product stream with a vinyl pyridine or a vinyl pyrrolidone resin bed which is operative to sequester entrained or volatile catalytic species. The invention is particularly useful in connection with the iridium catalysed carbonylation of methanol wherein the loss of entrained or volatile catalyst species depletes the catalytic content of the reactor. The resin may be digested in order to recover the catalytic metals.

L'invention concerne une méthode et un appareil de séquestration d'espèces catalytiques entraînées ou volatiles dans un processus de carbonylation. La méthode consiste à placer le débit diluat au contact d'un pyridine vinylique ou d'un lit de résine de pyrrolidone vinylique pouvant séquestrer des espèces catalytiques entraînées ou volatiles. La méthode de l'invention est particulièrement utile en rapport avec la carbonylation catalysée par iridium du méthanol dans laquelle la perte d'espèces catalytiques entraînées ou volatiles épuise le contenu catalytique du réacteur. La résine peut être digérée aux fins de récupérer les métaux catalytiques.

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