US3773686A
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Six-step regeneration procedure for a cokedeactivated bimetallic platinum group-group iv a catalyst
Assignee: Universal Oil Products Co
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Filing: 1971-09-09
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Granted: 1973-11-20
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Expires: 1991-09-09
Abstract
Abstract A deactivated hydrocarbon conversion catalyst, which is a combination of a platinum group component, a group IVA metallic component, and a halogen component with a porous carrier material and which has been deactivated by a deposition of carbonaceous materials thereon during a previous contacting with a hydrocarbon charge stock at an elevated temperature, is regenerated by the sequential steps of: (1) burning carbon therefrom at a relatively low temperature with a gas stream containing H2O and a small amount of O2, (2) treating with a gas stream containing H2O and a small amount of O2 at a relatively high temperature, (3) treating with a gas stream containing H2O and a large amount of O2 at the relatively high temperature, (4) treating with a gas stream containing halogen or a halogen-containing compound and water, (5) purging O2 and H2O from the resulting catalyst and (6) reducing with a dry hydrogen stream. Key features of the resulting method are: (1) presence of water in the gas streams used in all steps except the purging and reduction steps, (2) careful control of the inlet temperature used during each step, (3) adjustment of halogen content of the catalyst after the carbon-burning step and prior to the reduction step, (4) careful control over the composition of the gas streams used in the various steps thereof and (5) exclusion of sulfur compounds from all gas streams utilized.
Inventors
- 👤 J Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:21
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/02; C10G49/06; B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; B01J38/00; B01J38/04; B01J38/42; B01J38/44; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
22 words
A method as defined in claim 1 wherein the platinum group component of the catalyst is platinum or a compound of platinum.
Claim 2
Dependent Claim
76 words
subjecting the catalyst resulting from step (1) to contact with a substantially sulfur compound-free second gaseous mixture consisting essentially of about 0.2 to about 3 mole % O2, about 0.02 to about 25 mole % H2O, and an inert gas for a second period of at least about 0.5 to 5 hours at a temperature of about 500* to about 550* C. and at a pressure sufficient to maintain flow of said mixture through the catalyst;
Claim 3
Dependent Claim
73 words
contacting the catalyst resulting from step (2) with a substantially sulfur compound-free third gaseous mixture consisting essentially of about 10 to about 25 mole % O2, about 0.2 to about 25 mole % H2O, and an inert gas for a third period of at least about 1 to 5 hours at a temperature of about 500* to 550* C. and at a pressure sufficient to maintain flow of said mixture through the catalyst;
Claim 4
Dependent Claim
22 words
A method as defined in claim 1 wherein the platInum group component of the catalyst is palladium or a compound of palladium.
Claim 5
Dependent Claim
21 words
A method as defined in claim 1 wherein said halogen component of said catalyst is chlorine or a compound of chlorine.
Claim 6
Dependent Claim
84 words
subjecting the catalyst resulting from step (3) to contact with a substantially sulfur compound-free fourth gaseous mixture comprising about 1 to about 30 mole % H2O and about 0.05 to about 5 mole percent of a halogen or a halogen-containing compound and air or an inert gas for a fourth period of at least about 1 to about 10 hours at a temperature of about 400* to about 550* C. and at a pressure sufficient to maintain flow of said mixture through the catalyst;
Claim 7
Dependent Claim
18 words
purging oxygen and water from contact with the catalyst from step (4) with an inert gas stream; and,
Claim 8
Dependent Claim
21 words
A method as defined in claim 1 wherein said halogen component of said catalyst is fluorine or a compound of fluorine.
Claim 9
Dependent Claim
23 words
A method as defined in claim 1 wherein the group IVA metallic component of said catalyst is germanium or a compound of germanium.
Claim 10
Dependent Claim
48 words
subjecting the catalyst resulting from step (5) to contact with a substantially water-free and sulfur compound-free hydrogen stream at a temperature of about 400* to about 600* C. for a final period of at least about 0.5 to about 5 hours, thereby producing a regenerated hydrocarbon conversion catalyst.
Claim 11
Dependent Claim
23 words
A method as defined in claim 1 wherein the group IVA metallic component of said catalyst is tin or a compound of tin.
Claim 12
Dependent Claim
23 words
A method as defined in claim 1 wherein the group IVA metallic component of the catalyst is lead or a compound of lead.
Claim 13
Dependent Claim
14 words
A method as defined in claim 1 wherein said refractory inorganic oxide is alumina.
Claim 14
Dependent Claim
16 words
A method as defined in claim 9 wherein said alumina carrier material is gamma- or eta-alumina.
Claim 15
Dependent Claim
48 words
A method as defined in claim 1 wherein the deactivated catalyst contains, on a carbonaceous material-free and elemental basis, about 0.1 to about 3.5 wt. percent halogen, about 0.01 to about 2 wt. percent platinum group metal and about 0.01 to about 5 wt. percent group IVA metal.
Claim 16
Dependent Claim
71 words
A method as defined in claim 1 wherein the deactivated catalyst comprises a combination of a platinum component, a chlorine component and a tin component with an alumina carrier material in amounts sufficient to result in a catalyst containing, on a carbonaceous material-free and elemental basis, about 0.1 to about 3.5 wt. percent chlorine, about 0.01 to bout 2 wt. percent platinum and about 0.05 to about 2 wt. percent tin.
Claim 17
Dependent Claim
28 words
A method as defined in claim 1 wherein the deactivated catalyst contains, on a carbonaceous material-free basis, about 0.01 to about 0.5 wt. percent of a sulfur component.
Claim 18
Dependent Claim
71 words
A method as defined in claim 1 wherein said deactivated catalyst comprises a combination of a platinum component, a chlorine component and a germanium component with an alumina carrier materail in amounts sufficient to result in a catalyst containing, on a carbonaceous material-free and elemental basis, about 0.1 to bout 3.5 wt. percent chlorine, about 0.01 to about 2 wt. percent platinum and about 0.01 to about 5 wt. percent germanium.
Claim 19
Dependent Claim
37 words
A method as defined in claim 1 wherein the halogen component of the deactivated catalyst is chlorine or a compound of chlorine and the halogen or halogen-containing compound contained in the fourth gaseous mixture is hydrogen chloride.
Claim 20
Dependent Claim
37 words
A method as defined in claim 1 wherein the first and second gaseous mixtures consist essentially of about 0.5 to about 2 mole % O2, about 0.1 to about 4 mole % H2O, and an inert gas.
Claim 21
Dependent Claim
27 words
A method as defined in claim 1 wherein the third gaseous mixture consists essentially of an air stream containing about 0.1 to about 4 mole % H2O.
Claim 22
Dependent Claim
22 words
A method as defined in claim 1 wherein step (1) is performed at a temperature of about 375* to about 450* C.
Claim 23
Dependent Claim
22 words
A method as defined in claim 1 wherein step (6) is performed at a temperature of about 525* to about 575* C.
Claim 24
Dependent Claim
113 words
A method for regenerating a deactivated hydrocarbon conversion catalyst comprising a combination of a platinum group component, a group IVA metallic component, and a halogen component with refractory inorganic oxide material, the catalyst having been deactivated by deposition of carbonaceous materials thereon during a previous contacting with a hydrocarbon charge stock at an elevated temperature, said method comprising a combination of the method defined in claim 1 with the step of sulfiding the catalyst resulting from step (6) by contacting same at a temperature of about 20* to 550* C. with a sulfide-producing compound in an amount sufficient to result in a regenerated catalyst containing abOut 0.01 to about 0.5 wt. percent sulfur.
Claim 25
Dependent Claim
13 words
A method as defined in claim 20 wherein said sulfide-producing compound is H2S.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |