US3123548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of metallic impurities from
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:22
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A METHOD FOR IMPROVING THE PRODUCT DISTRIBUTION RESULTING FROM A HYDROCARBON CATALYTIC CRACKING PROCESS IN WHCH IS EMPLOYED A SILICA-ALUMINA CRACKING CATALYST WHICH COMPRISES (A) SEPARATING AT LEAST A PORTION OF THE TOTAL CATALYST FROM THE PROCESS, (B) CONTACTING THE SEPARATEED CATALYST AT A TEMPERATURE RANGING FROM 900*F. TO 1100*F. WITH A HYDROGEN SULFIDE-CONTAINING GAS, (C) CONTACTING THE HYDROGEN SULFIDE TREATED CATALYST WITH MOLECULAR OXYGEN AT A PARTIAL PRESSURE OF AT LEAST ONE ATMOSPHERE AND AT A TEMPERATURE RANGING FROM 350* F. TO 1100*F. FOR AT LEAST 30 MINUTES, (D) CONTACTING THE OXYGEN-TREATED CATALYST WITH A CATION EXCHANGE RESIN IN THE HYDROGENCYCLE IN AN AQUEOUS MEDIUM AT A PH SUCH THAT THE COKE-FORMING AND GAS-FORMING METAL CONTAMINANTS ARE REMOVED FROM THE CATALYST WHILE THE STABILITY OF THE CATALYST IS SUBSTANTIALLY MAINTAINED, (E) SEPARATING THE CONTACTED CATALYST FROM THE RESIN, AND (F) RETURNING THE CONTACTED CATALYST TO THE HYDROCARBON CRACKING PROCESS.
Claim 2
Independent Claim
150 words
A METHOD FOR IMPROVING THE PRODUCT DISTRIBUTION RESULTING FROM A HYDROCARBON CATALYTIC CRACKING PROCESS IN WHCH IS EMPLOYED A SILICA-ALUMINA CRACKING CATALYST WHICH COMPRISES (A) SEPARATING AT LEAST A PORTION OF THE TOTAL CATALYST FROM THE PROCESS, (B) CONTACTING THE SEPARATEED CATALYST AT A TEMPERATURE RANGING FROM 900*F. TO 1100*F. WITH A HYDROGEN SULFIDE-CONTAINING GAS, (C) CONTACTING THE HYDROGEN SULFIDE TREATED CATALYST WITH MOLECULAR OXYGEN AT A PARTIAL PRESSURE OF AT LEAST ONE ATMOSPHERE AND AT A TEMPERATURE RANGING FROM 350* F. TO 1100*F. FOR AT LEAST 30 MINUTES, (D) CONTACTING THE OXYGEN-TREATED CATALYST WITH A CATION EXCHANGE RESIN IN THE HYDROGENCYCLE IN AN AQUEOUS MEDIUM AT A PH SUCH THAT THE COKE-FORMING AND GAS-FORMING METAL CONTAMINANTS ARE REMOVED FROM THE CATALYST WHILE THE STABILITY OF THE CATALYST IS SUBSTANTIALLY MAINTAINED, (E) SEPARATING THE CONTACTED CATALYST FROM THE RESIN, AND (F) RETURNING THE CONTACTED CATALYST TO THE HYDROCARBON CRACKING PROCESS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |