US2875257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of improved alkylate products using a sulfuric acid treatment
Assignee: Atlantic Richfield Co
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Filing: 1954-06-15
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Granted: 1959-02-24
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Expires: 1974-06-15
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:37
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; C07C7/171; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD OF REMOVING RESIDUAL AMOUNT OF CATALYST AND DELETERIOUS UNREACTED MATERIALS FROM CRUDE ALKYL AROMATIC HYDROCARBON PRODUCT, PREPARED BY REACTING AN ALKYLATING AGENT WITH AN EXCESS OF AN AROMATIC HYDROCARBON IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST, WHICH CONSISTS ESSENTIALLY OF SEPARATING CATALYST FROM SAID CRUDE PRODUCT, REMOVING RESIDUAL AMOUNT OF CATALYST AND DELETERIOUS UNREACTED MATERIALS PRIOR TO DISTILLATION BY CONTACTING THE SEPARATED PRODUCT FOR A PERIOD OF 1 TO 30 MINUTES AND AT A TEMPERATURE OF 60* F. TO 160* F. WITH SULFURIC ACID OF 78 PERCENT TO 99 PERCENT CONCENTRATION, THE COMBINATION OF SAID CONTACTING PERIODS AND SAID ACID CONCENTRATIONS BEING SUCH AS TO PREVENT APPRECIABLE SULFONATION OF SAID ALKYL AROMATIC HYDROCARBON, AND SEPARATING THE SULFURIC ACID PHASE FROM THE HYDROCARBON PHASE.
Claim 2
Independent Claim
125 words
A METHOD OF REMOVING RESIDUAL AMOUNT OF CATALYST AND DELETERIOUS UNREACTED MATERIALS FROM CRUDE ALKYL AROMATIC HYDROCARBON PRODUCT, PREPARED BY REACTING AN ALKYLATING AGENT WITH AN EXCESS OF AN AROMATIC HYDROCARBON IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST, WHICH CONSISTS ESSENTIALLY OF SEPARATING CATALYST FROM SAID CRUDE PRODUCT, REMOVING RESIDUAL AMOUNT OF CATALYST AND DELETERIOUS UNREACTED MATERIALS PRIOR TO DISTILLATION BY CONTACTING THE SEPARATED PRODUCT FOR A PERIOD OF 1 TO 30 MINUTES AND AT A TEMPERATURE OF 60* F. TO 160* F. WITH SULFURIC ACID OF 78 PERCENT TO 99 PERCENT CONCENTRATION, THE COMBINATION OF SAID CONTACTING PERIODS AND SAID ACID CONCENTRATIONS BEING SUCH AS TO PREVENT APPRECIABLE SULFONATION OF SAID ALKYL AROMATIC HYDROCARBON, AND SEPARATING THE SULFURIC ACID PHASE FROM THE HYDROCARBON PHASE.
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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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |