C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 15/08 (2006.01) C07C 7/13 (2006.01)
Patent
CA 2368452
A process for the production of paraxylene from a C8 aromatic hydrocarbon stream using simulated moving bed countercurrent adsorption in combination with an ether desorbent and preferably a Ba X zeolite adsorbent. The adsorbent/ether desorbent system has been found to be particularly good when the water content of the system is carefully controlled. Preferred ether desorbents are diisopropyl ether and methyl tertiary-butyl ether.
L'invention concerne un processus permettant de produire du paraxylène à partir d'un courant d'hydrocarbure aromatique C¿8? à l'aide d'une adsorption à contre-courant d'un lit mobile simulé combinée avec un éther désorbant et, de préférence, un adsorbant Ba X zéolithe. L'ensemble adsorbant/éther désorbant est particulièrement efficace lorsque la teneur en eau dudit ensemble est scrupuleusement vérifiée. Les éthers désorbants préférés selon l'invention sont l'éther diisopropyle et l'éther méthyltertiobutylique.
Chevron Phillips Chemical Company Lp
Osler Hoskin & Harcourt Llp
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