Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1987-10-29
1988-08-16
Davis, Curtis R.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
C10G 3506
Patent
active
047642670
ABSTRACT:
A multi-stage catalytic reforming process using a catalyst having a high rhenium to platinum ratio in the first stage or stages and a catalyst having a still higher rhenium to platinum ratio for the last stage. The process comprises:
(a) contacting a naphtha feed with a first stage catalyst comprising rhenium and platinum, and having a rhenium to platinum weight ratio of at least 1.7, under catalytic reforming conditions in one or more first reforming stages of a reforming unit to obtain intermediate reformate; and
(b) contacting the intermediate reformate, under catalytic reforming conditions in a last stage of the reforming unit, with a last stage catalyst comprising rhenium and 0.2 to 2.0 weight percent platinum, and having sufficient rhenium so that the last stage catalyst has at least 0.5 weight percent rhenium beyond that necessary to attain a 1.7 rhenium to platinum weight ratio.
REFERENCES:
patent: 4464249 (1984-08-01), Mooi et al.
Chen Hong C.
Detz Cliff M.
Jossens Larry W.
Kluksdahl Harris E.
Tamm Paul W.
Chevron Research Company
Davis Curtis R.
De Jonghe T. G.
La Paglia S. R.
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