Multizone catalytic reforming process
First Claim
1. A process for the catalytic reforming of hydrocarbons comprising contacting a hydrocarbon feedstock in a catalyst system which comprises at least three sequential catalyst zones to obtain a reformate, comprising the steps of:
- (a) contacting the feedstock with a first catalytic composite consisting essentially of a platinum-group metal component, a metal promoter selected from the group consisting of rhenium, indium and tin, a refractory inorganic oxide, and a halogen component in an first catalyst zone at first reforming conditions to obtain a first effluent;
(b) contacting the first effluent with an intermediate catalytic composite consisting essentially of a platinum-group metal component, a germanium component, a refractory inorganic oxide, and a halogen component in an intermediate catalyst zone at intermediate reforming conditions to obtain an intermediate effluent; and
,(c) contacting the intermediate effluent with a terminal catalytic composite consisting essentially of a platinum-group metal component, a metal promoter selected from the group consisting of rhenium, indium and tin, a refractory inorganic oxide, and a halogen component in a terminal catalyst zone at terminal reforming conditions to obtain a reformate.
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Accused Products
Abstract
A hydrocarbon feedstock is catalytically reformed in a process which comprises at least three catalyst zones. The feedstock contacts a catalyst comprising platinum, a halogen, and a metal promoter on a solid catalyst support in a first catalyst zone. Effluent from the first catalyst zone contacts a catalyst comprising platinum, germanium and halogen on a solid catalyst support in an intermediate catalyst zone to obtain an intermediate effluent, which contacts a catalyst having the essential absence of germanium and comprising platinum, halogen and a metal promoter on a solid catalyst support in a terminal catalyst zone to obtain a reformate.
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Citations
18 Claims
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1. A process for the catalytic reforming of hydrocarbons comprising contacting a hydrocarbon feedstock in a catalyst system which comprises at least three sequential catalyst zones to obtain a reformate, comprising the steps of:
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(a) contacting the feedstock with a first catalytic composite consisting essentially of a platinum-group metal component, a metal promoter selected from the group consisting of rhenium, indium and tin, a refractory inorganic oxide, and a halogen component in an first catalyst zone at first reforming conditions to obtain a first effluent; (b) contacting the first effluent with an intermediate catalytic composite consisting essentially of a platinum-group metal component, a germanium component, a refractory inorganic oxide, and a halogen component in an intermediate catalyst zone at intermediate reforming conditions to obtain an intermediate effluent; and
,(c) contacting the intermediate effluent with a terminal catalytic composite consisting essentially of a platinum-group metal component, a metal promoter selected from the group consisting of rhenium, indium and tin, a refractory inorganic oxide, and a halogen component in a terminal catalyst zone at terminal reforming conditions to obtain a reformate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A process for the catalytic reforming of hydrocarbons comprising contacting a hydrocarbon feedstock in a catalyst system which comprises at least three sequential catalyst zones to obtain a reformate, comprising the steps of:
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(a) contacting the feedstock with a first catalytic composite consisting essentially of a platinum-group metal component, a metal promoter selected from the group consisting of rhenium, indium and tin, a refractory inorganic oxide, and a halogen component in an first catalyst zone at first reforming conditions to obtain a first effluent; (b) contacting the first effluent with an intermediate catalytic composite consisting essentially of a platinum-group metal component, a germanium component, a refractory inorganic oxide, and a halogen component in an intermediate catalyst zone at intermediate reforming conditions to obtain an intermediate effluent; and
,(c) contacting the intermediate effluent with a terminal catalytic composite consisting essentially of a platinum-group metal component, a metal promoter selected from the group consisting of rhenium, indium and tin, a refractory inorganic oxide, and a halogen component in a terminal catalyst zone comprising a moving-bed system with continuous catalyst regeneration at terminal reforming conditions to obtain a reformate.
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18. The process of claim 19 wherein wherein hydrogen is combined with the feedstock to the present catalyst system to provide a ratio of about 0.1 to 20 moles of hydrogen per mole of hydrocarbon feedstock entering the first catalyst zone.
Specification