Patent US2906693A successfully refreshed from Google Patents.
US2906693A
Expired / Lapsed
US
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Pretreatment of catalytic cracking feed to remove metals
Assignee: Gulf Research and Development Co
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Filing: 1956-05-18
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Granted: 1959-09-29
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Expires: 1976-05-18
Abstract
No abstract record available.
Inventors
- 👤 Robert E Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:49
CPC Classifications
C; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE PROCESS OF CATALYTICALLY CRACKING A CHARGE STOCK WHICH CONTAINS A METALLIFEROUS IMPURITY IN AN AMOUNT SUFFICIENT TO CAUSE DETERIORATION IN SELECTIVITY OF THE CRACKING CATALYST WHICH COMPRISES IN COMBINATION SUBJECTING THE CHARGES STOCK TO DISTILLATION TO SEPARATE A LOWER BOILING PORTION WHICH CONTAINS A SMALLER AMOUNT OF METALLIFEROUS IMPURITY THAN THE ORIGINAL CHARGE STOCK AND AN UNDISTILLED RESIDUAL FRACTION WHICH CONTAINS A LARGWE AMOUNT OF METALLIFEROUS IMPURITY THAN THE ORIGINAL CHARGE STOCK, EXTRACTING THE UNDISTILLED RESIDUAL FRACTION WITH A SOLVENT HAVING SELECTIVELY FOR AROMATIC HYDROCARBONS AND SUBJECTING THE RAFFINATE PHASE TO CATALYTIC CRACKING.
Claim 2
Dependent Claim
94 words
THE PROCESS OF CATALYTICALLY CRACKING A CHARGE STOCK WHICH CONTAINS A METALLIFEROUS IMPURITY IN AN AMOUNT SUFFICIENT TO CAUSE DETERIORATION IN SELECTIVITY OF THE CRACKING CATALYST WHICH COMPRISES IN COMBINATION SUBJECTING THE CHARGES STOCK TO DISTILLATION TO SEPARATE A LOWER BOILING PORTION WHICH CONTAINS A SMALLER AMOUNT OF METALLIFEROUS IMPURITY THAN THE ORIGINAL CHARGE STOCK AND AN UNDISTILLED RESIDUAL FRACTION WHICH CONTAINS A LARGWE AMOUNT OF METALLIFEROUS IMPURITY THAN THE ORIGINAL CHARGE STOCK, EXTRACTING THE UNDISTILLED RESIDUAL FRACTION WITH A SOLVENT HAVING SELECTIVELY FOR AROMATIC HYDROCARBONS AND SUBJECTING THE RAFFINATE PHASE TO CATALYTIC CRACKING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |