Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1991-07-22
1995-04-18
Morris, Theodore
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
208138, 585322, C10G 3506
Patent
active
054075580
ABSTRACT:
A method is provided of selecting operating parameters for an aromatization process having at least penultimate and final stages, each containing a respective catalyst, for optimum aromatic barrel per calendar day (AB/CD) production of product having a selected RON and/or over a particular run length. The catalyst lives are determined at constant LHSV for the penultimate and final stage catalysts for a given feed RON to each stage as a function of the change in RON from that of the feed to that of the C.sub.5+ effluent from the respective stage. The penultimate stage C.sub.5+ effluent RON is selected to be such that the lives of the catalysts in each stage are substantially equal. Preferably the yield of C.sub.5+ effluent from each stage and the life of the catalyst used in each stage is determined as a function of the pressure of that stage. The operating pressures of the stages are then selected to be within about 30% of that which gives the highest AB/CD.
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"Petroleum, Prehistoric to Petrochemicals", G. A. Purdy, 1958, pp. 307-310.
Kline Jules M.
Miller Stephen J.
Mulaskey Bernard F.
Chevron Research and Technology Company
Griffin Walter D.
Morris Theodore
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