Patent US2828331A successfully refreshed from Google Patents.
US2828331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonation of petroleum oils
Assignee: Pure Oil Co
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Filing: 1956-09-26
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Granted: 1958-03-25
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Expires: 1976-09-26
Abstract
No abstract record available.
Inventors
- 👤 Milton M Marisic
- 👤 Le Roi E Hutchings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:11
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
THE METHOD OF PRODUCING PETROLEUM SULFONIC ACIDS WHICH COMPRISES CONTACTING A FLOWING STREAM OF A SULFONATABLE MINERAL OIL AT A TEMPERATURE OF ABOVE ABOUT 32* F. WITH AN INJECTED STREAM OF A SULFONATING AGENT CONTAINING SULFUR TRIOXIDE IN A SINGLE REACTION ZONE MAINTAINED UNDER TURBULENT FLOW CONDITIONS AT A REYNOLDS NUMBER OF ABOVE ABOUT 3000 AT THE POINT OF INJECTION THE CONCENTRATION OF SAID SULFUR TRIOXIDE IN SAID SULFONATING AGENT BEING ABOUT 4.0 TO 10.0 WEIGHT PERCENT BASED ON THE AMOUNT OF SAID MINERAL OIL, SAID RESPECTIVE STREAMS BEING DILUTED WITH A DILUENT SELECTED FROM THE GROUP CONSISTING OF SULFUR DIOXIDE, ETHYLENE CHLORIDE AND INERT GASES, THE PRESSURE OF THE STREAM OF MINERAL OIL BEING AT LEAST ABOUT 50 P. S. I. G. LESS THAN THE PRESSURE OF SAID STREAM OF SULFONATING AGENT, THE AMOUNT OF SAID DILUENT PRESENT IN THE OIL PHASE IN SAID REACTION ZONE BEING BETWEEN ABOUT 1 VOLUME TO 3 VOLUMES PER VOLUME OF MINERAL OIL, AND RECOVERING A SEPARATE PHASE CONTAINING PETROLEUM SULFONIC ACIDS.
Claim 2
Independent Claim
169 words
THE METHOD OF PRODUCING PETROLEUM SULFONIC ACIDS WHICH COMPRISES CONTACTING A FLOWING STREAM OF A SULFONATABLE MINERAL OIL AT A TEMPERATURE OF ABOVE ABOUT 32* F. WITH AN INJECTED STREAM OF A SULFONATING AGENT CONTAINING SULFUR TRIOXIDE IN A SINGLE REACTION ZONE MAINTAINED UNDER TURBULENT FLOW CONDITIONS AT A REYNOLDS NUMBER OF ABOVE ABOUT 3000 AT THE POINT OF INJECTION THE CONCENTRATION OF SAID SULFUR TRIOXIDE IN SAID SULFONATING AGENT BEING ABOUT 4.0 TO 10.0 WEIGHT PERCENT BASED ON THE AMOUNT OF SAID MINERAL OIL, SAID RESPECTIVE STREAMS BEING DILUTED WITH A DILUENT SELECTED FROM THE GROUP CONSISTING OF SULFUR DIOXIDE, ETHYLENE CHLORIDE AND INERT GASES, THE PRESSURE OF THE STREAM OF MINERAL OIL BEING AT LEAST ABOUT 50 P. S. I. G. LESS THAN THE PRESSURE OF SAID STREAM OF SULFONATING AGENT, THE AMOUNT OF SAID DILUENT PRESENT IN THE OIL PHASE IN SAID REACTION ZONE BEING BETWEEN ABOUT 1 VOLUME TO 3 VOLUMES PER VOLUME OF MINERAL OIL, AND RECOVERING A SEPARATE PHASE CONTAINING PETROLEUM SULFONIC ACIDS.
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |