C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 7/12 (2006.01) C07C 5/27 (2006.01) C07C 7/13 (2006.01) C07C 15/067 (2006.01) C07C 15/08 (2006.01)
Patent
CA 2521939
Disclosed herein is an improved method for making and obtaining para-xylene from a mixture of xylene isomers, and various embodiments of the method. The method generally includes contacting a mixture comprising xylene isomers and ethylbenzene with a para-xylene selective adsorbent to obtain a para-xylene depleted raffinate, and a desorption effluent comprising a para-xylene enriched product. The method also includes isomerizing the paraxylene depleted raffinate. The contacting step is carried out in a manner such that the raffinate need not be pressurized prior to isomerization, thus advantageously obviating expensive compression steps.
L'invention concerne un procédé amélioré permettant de fabriquer et de produire du paraxylène à partir d'un mélange d'isomères du xylène. Le procédé selon l'invention consiste en général à mettre en contact un mélange contenant des isomères du xylène et de l'éthylbenzène avec un adsorbant sélectif du paraxylène, de sorte à obtenir un raffinat appauvri en paraxylène, et un effluent de désorption contenant un produit enrichi en paraxylène. Ledit procédé consiste également à isomériser ledit raffinat appauvri en paraxylène. L'étape de mise en contact est réalisée de sorte que le raffinat ne nécessite pas de pressurisation avant l'isomérisation, ce qui permet d'éliminer avantageusement les étapes coûteuses de compression.
Doyle Ruth Ann
Miller Jeffrey T.
Williams Bryce A.
Bp Corporation North America Inc.
Gowling Lafleur Henderson Llp
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