Patent USRE28646E successfully refreshed from Google Patents.
Patent US4348273A successfully refreshed from Google Patents.
US4348273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating cracking catalyst fines containing a passivating material
Assignee: Phillips Petroleum Co
•
Filing: 1980-06-25
•
Granted: 1982-09-07
•
Expires: 2000-06-25
Abstract
Abstract In a hydrocarbon conversion operation employing a fluidized cracking catalyst wherein the cracking catalyst has been passivated to render contaminating metals thereon substantially inactive thus to avoid undesired reactions and wherein the used catalyst is regenerated and the regeneration step yields catalyst fines and a flue gas and the flue gas and fines are separated in at least two stages a first stage yielding coarse fines and a later stage yielding finer fines the step of treating finer fines to render metals thereon non-leachable or having substantially reduced leachability to render the finer fines usable as land fill which comprises treating the finer fines with a tin and/or indium and/or a compound of tin and/or a compound of indium.
Inventors
- 👤 Richard H. Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:42
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
177 words
A process comprising: (a) cracking a hydrocarbon oil in a cracking zone in the presence of a cracking catalyst; wherein said catalyst becomes contaminated with a contaminant that is a member of the group consisting of vanadium, chromium, iron, cobalt, copper, arsenic, antimony, platinum, bismuth and compounds thereof; (b) regenerating, in a regeneration zone, said cracking catalyst; (c) passing from said regeneration zone gas and fines of said catalyst to a first separation zone. (d) separating, in said first separation zone, coarser fines of said catalyst from finer fines of said catalyst; wherein said finer fines are contaminated with more, on a weight percent basis, of said contaminant than are said coarser fines; (e) recycling said coarser fines to said cracking zone; (f) separating, in a second separation zone, said gas from said finer fines; and (g) treating said finer fines with a stabilizing agent in an amount sufficient to improve the stability of said contaminant against leaching by water; wherein said stabilizing agent is a member of the group consisting of indium, tin and compounds thereof.
Claim 2
Dependent Claim
177 words
A process comprising: (a) cracking a hydrocarbon oil in a cracking zone in the presence of a cracking catalyst; wherein said catalyst becomes contaminated with a contaminant that is a member of the group consisting of vanadium, chromium, iron, cobalt, copper, arsenic, antimony, platinum, bismuth and compounds thereof; (b) regenerating, in a regeneration zone, said cracking catalyst; (c) passing from said regeneration zone gas and fines of said catalyst to a first separation zone. (d) separating, in said first separation zone, coarser fines of said catalyst from finer fines of said catalyst; wherein said finer fines are contaminated with more, on a weight percent basis, of said contaminant than are said coarser fines; (e) recycling said coarser fines to said cracking zone; (f) separating, in a second separation zone, said gas from said finer fines; and (g) treating said finer fines with a stabilizing agent in an amount sufficient to improve the stability of said contaminant against leaching by water; wherein said stabilizing agent is a member of the group consisting of indium, tin and compounds thereof.
Claim 3
Dependent Claim
22 words
A process in accordance with claim 1 wherein said contaminant is a member of the group consisting of antimony and compounds thereof.
Claim 4
Dependent Claim
34 words
A process in accordance with claim 1 or 2 wherein said stabilizing agent is a member of the group consisting of a water insoluble oxide of indium and a water insoluble sulfide of indium.
Claim 5
Dependent Claim
73 words
A process in accordance with claim 16 or 17 wherein said stabilizing agent is an indium compound selected from the group consisting of indium oxide, indium sulfide, indium tris (0,0-dihydrocarbyl phosphite), indium tallate, indium dialkyldithiocarbamate and indium salt of the organic phosphate [(RO.sub.2 PXX].sub.3 In; wherein each X is selected independently from the group consisting of oxygen and sulfur; and wherein R is an alkyl group containing from 2 to 20 carbon atoms.
Claim 6
Dependent Claim
34 words
A process in accordance with claim 1 or 2 wherein said stabilizing agent is a member of the group consisting of a water insoluble oxide of tin and a water insoluble sulfide of tin.
Claim 7
Dependent Claim
53 words
A process in accordance with claim 1 or 2 wherein said stabilizing agent is a tin compound selected from the group consisting of stannous oxide, stannic oxide, stannous sulfide, stannic sulfide, a tin salt of a carboxylic acid, a tin thiocarboxylate, a dihydrocarbyltin bis(hydrocarbyl mercaptoalkanoate), a tin thiocarbamate and a dihydrocarbyltin bis(0,0-dihydrocarbyl thiophosphate).
Claim 8
Dependent Claim
24 words
A process in accordance with claim 1 or 2 wherein an aqueous solution of said stabilizing agent is used to treat said finer fines.
References Cited (Backward Citations)
US2631968A
Cited
US2391334A
Cited
US2437352A
Cited
US2651600A
Cited
US2901419A
Cited
US3674706A
Cited
US4101417A
Cited
US4148714A
Cited
US4222856A
Cited
US4255287A
Cited
US4238367A
Cited
US4276149A
Cited
US4268188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |