Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By isomerization
Patent
1995-11-14
1998-01-06
Beck, Shrive P.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By isomerization
585482, 585486, 585805, C07C 522
Patent
active
057057265
ABSTRACT:
A mixture of aromatic hydrocarbons, comprising ethylbenzene and at least one xylene, is isomerized using a two reactor system to convert the ethylbenzene to compounds that may be removed from the aromatic hydrocarbon stream and to produce a product stream wherein the para-xylene concentration is approximately equal to the equilibrium ratio of the para-isomer. The catalyst present in the first reactor is one that is effective for ethylbenzene conversion with minimal xylene loss when operated under suitable conversion conditions, e.g., a catalyst comprising silica bound ZSM-5 that has been selectivated by one or more silicon impregnations or that has been coke selectivated. The catalyst present in the second reactor is one which is effective to catalyze xylene isomerization when operated under suitable conditions. Each of the catalysts of this invention may contain one or more hydrogenation or dehydrogenation components.
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Abichandani Jeeven S.
Beck Jeffrey S.
Breckenridge Lloyd L.
Bundens Robert G.
Stern David L.
Beck Shrive P.
Keen Malcolm D.
Loo Blossom E.
Meeks Timothy
Mobil Oil Corporation
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