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US 6,784,132 B1Granted
Cyclic catalyst regeneration process using adsorption and desorption
AssigneeUop LLC
InventorPaul A. Sechrist
Life of this patent
Estimating the term…
Abstract
A method of recovering halogen-containing materials from the cyclic catalyst regeneration operation of a catalytic hydrocarbon conversion process is disclosed. The method uses an arrangement of beds of adsorbent to maintain the halogen-containing materials within a circulating regeneration circuit.
Claims22
A process for the regeneration of a hydrocarbon conversion catalyst in the presence of a halogen-containing material, the process comprising:
- (a) contacting a regeneration inlet stream comprising a first component selected from the group consisting of oxygen, hydrogen, nitrogen, and a C1-C5 hydrocarbon with a catalyst in the presence of a halogen-containing material at regeneration conditions to at least partially regenerate said catalyst and produce a regeneration effluent stream comprising said material and said first component;
- (b) contacting at least a portion of said regeneration effluent stream with an adsorbent, adsorbing said material on said adsorbent at adsorption conditions, and recovering an adsorption effluent stream comprising said first component and having a reduced concentration of said material relative to said at least a portion of said regeneration effluent stream;
- (c) contacting a desorption inlet stream comprising a second component selected from the group consisting of oxygen, hydrogen, nitrogen, and a C1-C5 hydrocarbon with said adsorbent, said adsorbent having said material adsorbed thereon, desorbing said material from said adsorbent at desorption conditions, and recovering a desorption effluent stream comprising said material and said second component;
- and
- (d) forming said regeneration inlet stream from at least a portion of said desorption effluent stream.
2 more elements
A sorptive method for recovering a chlorine-containing material from the outlet stream of a cyclic regeneration operation of a hydrocarbon conversion process using a hydrocarbon conversion catalyst, said method comprising:
- (a) passing hydrocarbons to a first catalyst bed containing a hydrocarbon conversion catalyst and converting said hydrocarbons;
- (b) passing a regeneration inlet stream comprising a first component selected from the group consisting of oxygen, hydrogen, nitrogen, and a C1-C5 hydrocarbon to a second catalyst bed containing said hydrocarbon conversion catalyst, at least partially regenerating said hydrocarbon conversion catalyst in said second catalyst bed at regeneration conditions and in the presence of a chlorine-containing material, and recovering from the second catalyst bed a regeneration effluent stream comprising said material and said first component;
- (c) passing at least a portion of said regeneration effluent stream to an adsorption zone containing an adsorbent, adsorbing said material on said adsorbent at adsorption conditions, and recovering an adsorption effluent stream comprising said first component and having a reduced concentration of said material relative to said regeneration effluent stream;
- (d) passing a desorption inlet stream comprising a second component selected from the group consisting of oxygen, hydrogen, nitrogen, and a C1-C5 hydrocarbon to a desorption zone containing said adsorbent, said adsorbent in said desorption zone having said material adsorbed thereon, desorbing said material from said adsorbent in said desorption zone, and recovering a desorption effluent stream comprising said material and said second component;
- (e) forming said regeneration inlet stream from at least a portion of the desorption effluent stream;
- and
- (f) at least periodically shifting the functions of said adsorption and desorption zones by operating said adsorption zone to function as said desorption zone in (d), and operating said desorption zone to function as said adsorption zone in (c).
4 more elements
Dependencies are inferred from the claim text.