US3373102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pretreatment of catalytic cracking feed stocks
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1965-12-17
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Granted: 1968-03-12
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Expires: 1985-12-17
Abstract
No abstract record available.
Inventors
- 👤 Bernard L Schulman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:01
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; B01J38/00; C; C10; C10G; C10G11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOD FOR REMOVING CATALYST CONTAMINATING MATERIAL FROM OIL FEED STOCKS FOR CATALYTIC CRACKING WHICH COMPRISES MIXING A HIGH BOILING CONTAMINATED HYDROCARBON OIL FEED WITH FINELY DIVIDED CRACKING CATALYST AT AN ELEVATED TEMPERATURE IN AT LEAST ONE STAGE, PASSING THE RESULTING OIL-CATALYST MIXTURE INTO A HYDROCLONE FOR SEPARATING AT LEAST 95% OF THE PARTIALLY SPENT CATALYST PARTICLES FROM TREATED OIL FEED HAVING A REDUCED CONTAMINANT CONTENT, CATALYTICALLY CRACKING THE TREATED OIL FEED TO PRODUCE LOWER BOILING HYDROCARBONS, FRACTIONATING THE CATALYTICALLY CRACKED LOWER BOILING PRODUCTS TO RECOVER GASOLINE AND CYCLE OIL, MIXING AT LEAST PART OF THE RECOVERED CYCLE OIL WITH SAID PARTIALLY SPENT FINELY DIVIDED CATALYST PARTICLES SEPARATED IN SAID HYDROCLONE TO REGENERATE AND WASH SAID FINELY DIVIDED CATALYST PARTICLES AND PASSING THE RESULTING MIXTURE TO A SECOND HYDROCLONE FOR SEPARATING
Claim 2
Independent Claim
131 words
A METHOD FOR REMOVING CATALYST CONTAMINATING MATERIAL FROM OIL FEED STOCKS FOR CATALYTIC CRACKING WHICH COMPRISES MIXING A HIGH BOILING CONTAMINATED HYDROCARBON OIL FEED WITH FINELY DIVIDED CRACKING CATALYST AT AN ELEVATED TEMPERATURE IN AT LEAST ONE STAGE, PASSING THE RESULTING OIL-CATALYST MIXTURE INTO A HYDROCLONE FOR SEPARATING AT LEAST 95% OF THE PARTIALLY SPENT CATALYST PARTICLES FROM TREATED OIL FEED HAVING A REDUCED CONTAMINANT CONTENT, CATALYTICALLY CRACKING THE TREATED OIL FEED TO PRODUCE LOWER BOILING HYDROCARBONS, FRACTIONATING THE CATALYTICALLY CRACKED LOWER BOILING PRODUCTS TO RECOVER GASOLINE AND CYCLE OIL, MIXING AT LEAST PART OF THE RECOVERED CYCLE OIL WITH SAID PARTIALLY SPENT FINELY DIVIDED CATALYST PARTICLES SEPARATED IN SAID HYDROCLONE TO REGENERATE AND WASH SAID FINELY DIVIDED CATALYST PARTICLES AND PASSING THE RESULTING MIXTURE TO A SECOND HYDROCLONE FOR SEPARATING
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |