US2948764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing the quantity of thiophenes in an aromatic hydrocarbon
Assignee: Stamicarbon BV
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Filing: 1958-07-25
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Granted: 1960-08-09
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Expires: 1978-07-25
Abstract
No abstract record available.
Inventors
- 👤 Adriaan P Oele
- 👤 Mathias J G Muytjiens
- 👤 Johan R H Goris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:50
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; C07C7/171; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/924; Y10S585/949; Y10S585/953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR REDUCING THE QUANTITY OF THIOPHENES IN AN AROMATIC HYDROCARBON BY TREATMENT THEREOF WITH SULPHURIC ACID HAVING A CONCENTRATION OF AT LEAST 95%, SAID PROCESS COMPRISING THE STEPS OF COUNTER-CURRENTLY AND CONTINUOUSLY PASSING SAID SULPHURIC ACID AND SAID HYDROCARBON IN THE LIQUID STATE AT A TEMPERATUE BETWEEN 20 AND 45*C., THROUGH A PACKED VERTICAL COLUMN CONTINING SOLID PACKING MATERIAL AND HAVING A FREE SPACE THEREIN AMOUNTING TO FROM 50 TO 96% OF THE SPACE OCCUPIED BY THE PACKING, THE HYDROCARBON BEING PASSED UPWARDLY THROUGH SAID COLUMN, AND PULSATING THE LIQUIDS DURING THEIR PASSAGE THROUGH SAID COLUMN FROM 100-300 PULSES BEING IMPARTED TO THE LIQUID PER MINUTE.
Claim 2
Dependent Claim
108 words
A PROCESS FOR REDUCING THE QUANTITY OF THIOPHENES IN AN AROMATIC HYDROCARBON BY TREATMENT THEREOF WITH SULPHURIC ACID HAVING A CONCENTRATION OF AT LEAST 95%, SAID PROCESS COMPRISING THE STEPS OF COUNTER-CURRENTLY AND CONTINUOUSLY PASSING SAID SULPHURIC ACID AND SAID HYDROCARBON IN THE LIQUID STATE AT A TEMPERATUE BETWEEN 20 AND 45*C., THROUGH A PACKED VERTICAL COLUMN CONTINING SOLID PACKING MATERIAL AND HAVING A FREE SPACE THEREIN AMOUNTING TO FROM 50 TO 96% OF THE SPACE OCCUPIED BY THE PACKING, THE HYDROCARBON BEING PASSED UPWARDLY THROUGH SAID COLUMN, AND PULSATING THE LIQUIDS DURING THEIR PASSAGE THROUGH SAID COLUMN FROM 100-300 PULSES BEING IMPARTED TO THE LIQUID PER MINUTE.
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) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |