Process for production of ethylbenzene from dilute ethylene...

C - Chemistry – Metallurgy – 07 – C

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C07C 2/64 (2006.01) C07C 15/073 (2006.01)

Patent

CA 2547610

An improvement in a process for the production of ethylbenzene from a dilute ethylene stream wherein an ethylene-containing stream derived from a cracking process is directed to an ethylene fractionator for separation of ethylene and ethane. The improvement includes providing the dilute ethylene stream by liquefying and separating out a portion of the ethylene-containing stream prior to directing the remainder of the ethylene-containing stream to the ethylene fractionator and/or by drawing off a side stream from the ethylene fractionator; and, directing the dilute ethylene stream as a feed to an alkylator for alkylation with benzene to produce ethylbenzene.

L'invention concerne une amélioration apportée à un procédé de production d'éthylbenzène à partir d'un flux d'éthylène de diluat, un flux renfermant de l'éthylène dérivé d'un procédé de craquage étant dirigé dans une tour de fractionnement d'éthylène, aux fins de séparation de l'éthylène et de l'éthane. Cette amélioration consiste à utiliser le flux d'éthylène de diluat par liquéfaction et séparation d'une partie du flux renfermant de l'éthylène avant que le reste du flux renfermant de l'éthylène soit dirigé dans la tour de fractionnement d'éthylène et/ou par prélèvement d'un flux latéral de la tour de fractionnement d'éthylène; et à diriger le flux d'éthylène de diluat, comme charge, dans un alkylateur aux fins d'alkylation avec du benzène, de manière à produire un éthylbenzène.

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