Patent US2793181A successfully refreshed from Google Patents.
US2793181A
Expired / Lapsed
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Electrolytic regeneration of alkylation sulfuric acid
Assignee: Standard Oil Co
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Filing: 1953-07-16
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Granted: 1957-05-21
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Expires: 1973-07-16
Abstract
No abstract record available.
Inventors
- 👤 Visnapun Naima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:53
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A METHOD FOR THE REGENERATION OF SPENT ALKYLATION SULFURIC ACID HAVING AN ACID CONCENTRATION OF 80% TO 90% AND THE BALANCE CONSISTING PRIMARILY OF HYDROCARBON-CONTAINING CONTAMINANTS WHEREIN THE SPENT ACID IS ELECTROLYZED IN A COMPARTMENTED ELECTROLYTIC CELL AND THE RECONCENTRATED SULFURIC ACID IS RECOVERED FROM THE ANODE COMPARTMENT OF THE CELL, THE IMPROVEMENT WHICH COMPRISES MAINTAINING THE TEMPERATURE OF THE ACID IN THE ANOD COMPARTMENT FROM ABOUT 15* TO ABOUT 75* HIGHER THAN THE TEMPERATURE OF THE ACID IN THE CATHODE COMPARTMENT, THE INITIAL TEMPERATURE OF THE ELECTROLYSIS BEING LESS THAN ABOUT 60*F. IN THE CATHODE COMPARTMENT AND LESS THAN ABOUT 90*F. IN THE ANODE COMPARTMENT AND THE FINAL TEMPERATURE OF THE ELECTROLYSIS BEING LESS THAN ABOUT 150* F. IN THE ANODE COMPARTMENT.
Claim 2
Dependent Claim
124 words
IN A METHOD FOR THE REGENERATION OF SPENT ALKYLATION SULFURIC ACID HAVING AN ACID CONCENTRATION OF 80% TO 90% AND THE BALANCE CONSISTING PRIMARILY OF HYDROCARBON-CONTAINING CONTAMINANTS WHEREIN THE SPENT ACID IS ELECTROLYZED IN A COMPARTMENTED ELECTROLYTIC CELL AND THE RECONCENTRATED SULFURIC ACID IS RECOVERED FROM THE ANODE COMPARTMENT OF THE CELL, THE IMPROVEMENT WHICH COMPRISES MAINTAINING THE TEMPERATURE OF THE ACID IN THE ANOD COMPARTMENT FROM ABOUT 15* TO ABOUT 75* HIGHER THAN THE TEMPERATURE OF THE ACID IN THE CATHODE COMPARTMENT, THE INITIAL TEMPERATURE OF THE ELECTROLYSIS BEING LESS THAN ABOUT 60*F. IN THE CATHODE COMPARTMENT AND LESS THAN ABOUT 90*F. IN THE ANODE COMPARTMENT AND THE FINAL TEMPERATURE OF THE ELECTROLYSIS BEING LESS THAN ABOUT 150* F. IN THE ANODE COMPARTMENT.
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) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |