Ethylene recovery in direct-oxidation ethylene oxide processes

C - Chemistry – Metallurgy – 07 – D

Patent

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Details

C07D 303/04 (2006.01) C07D 301/08 (2006.01) C07D 301/10 (2006.01) C07D 301/32 (2006.01)

Patent

CA 2103973

A direct-oxidation ethylene oxide process of the type comprising a) reacting a feed gas stream including ethylene and a commercially-pure oxygen in one or more reactors and b) absorbing out ethylene oxide from the product stream from the one or more reactors in a first absorption zone, unreacted ethylene is recoverd from an ethylene-rich argon purge gas stream via an absorber and a stripper in combination, the recovered ethylene is recycled to the feed gas stream, and an ethylene-lean argon purge gas stream is purged.

Procédé de production d'oxyde d'éthylène par oxydation directe. Ce procédé comporte les étapes suivantes : a) faire réagir un flux de gaz d'alimentation comprenant de l'éthylène et de l'oxygène pur de commerce dans un ou plusieurs réacteurs; b) absorber l'oxyde d'éthylène à partir du flux du produit depuis un ou plusieurs réacteurs dans une première zone d'absorption. L'éthylène n'ayant pas réagi est récupéré dans un flux de gaz de purge d'argon riche en éthylène au moyen d'un absorbeur et d'un extracteur. L'éthylène récupéré est recyclé dans le flux de gaz d'alimentation, et le flux de gaz de purge d'argon faible en éthylène est éliminé.

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