Process for reforming a hydrocarbon stream in a unit having fixed and moving bed reaction zones
AssigneeUop LLC
InventorsGary A. Dziabis, Leon Yuan, David J. Fecteau
Life of this patent
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Abstract
A process for reforming a hydrocarbon stream in a reforming unit can include passing a gas including a halogen-containing material from a product separation zone through an adsorption zone to remove at least some of the halogen-containing material before the gas enters a first reforming stage having at least one fixed bed reaction zone.
Claims20
A process for reforming a hydrocarbon stream in a reforming unit, comprising:
- (a) passing the hydrocarbon stream through a first reforming stage, wherein the first reforming stage comprises at least one fixed bed reaction zone;
- (b) passing the hydrocarbon stream through a second reforming stage, wherein the second reforming stage comprises at least one moving bed reaction zone;
- (c) sending the hydrocarbon stream to a separator;
- (d) separating a gas comprising a halogen-containing material;
- (e) sending at least a portion of the gas to an adsorption zone to reduce an amount of the halogen-containing material in the gas;
- and
- (f) recycling the gas within the reforming unit.
A process for reforming a hydrocarbon stream in a hybrid reforming unit, comprising:
- (a) passing a gas comprising a halogen-containing material from a product separation zone through an adsorption zone to remove at least some of the halogen-containing material before the gas enters a first reforming stage comprising at least one fixed bed reaction zone.
A process for controlling chloride retention of at least one catalyst of at least one fixed bed reaction zone of a hybrid reforming unit comprising at least one fixed bed reaction zone and at least one moving bed reaction zone, comprising:
- (a) injecting a halide agent into a hydrocarbon stream before passing through the at least one moving bed reaction zone at a concentration of about 0.05-about 50 ppm by weight based on the total weight of hydrocarbons in the hydrocarbon stream;
- or
- (b) selecting a fixed bed catalyst and a moving bed catalyst wherein:
- i) an initial surface area of the fixed bed catalyst is less than an initial surface area of the moving bed catalyst;
- or
- iii) an initial halide loading of the fixed bed catalyst is greater than an initial halide loading of the moving bed catalyst;
- effective to minimize a loading of one or more halides to the fixed bed catalyst from the moving bed catalyst.
Dependencies are inferred from the claim text.