Process for the removal of nitrogen compounds from an aromatic s

Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By condensation of entire molecules or entire hydrocarbyl...

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585323, 585475, 585481, 585486, 585804, 585805, 585823, C07C 264, C07C 100, C07C 522, C07C 412

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active

059426500

ABSTRACT:
This invention relates to a catalytic reaction of an aromatic stream wherein a guard bed for the removal of nitrogen compounds from the aromatic hydrocarbon stream comprising the nitrogen compounds is provided to contact the hydrocarbon stream with a selective adsorbent having an average pore size less than about 5.5 Angstroms to produce a treated feedstream essentially free of the nitrogen compound. The selective adsorbent is a molecular sieve selected from the group consisting of pore closed zeolite 4A, zeolite 4A, zeolite 5A, silicalite, F-silicalite, ZSM-5 and mixtures thereof. The invention provides significant cost advantages when the feedstream is subject to slugs or surges in levels of nitrogen compounds which can be detrimental to downstream acid catalysts as found in aromatic conversion reactions.

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