US3176041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of naphthenic acids from a petroleum oil
Assignee: Pure Oil Co
•
Filing: 1961-08-08
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Granted: 1965-03-30
•
Expires: 1981-08-08
Abstract
No abstract record available.
Inventors
- 👤 George W Ayers
- 👤 William A Krewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:41
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G19/00; C10G25/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR SEPARATING NAPHTHENIC ACIDS FROM A PETROLEUM OIL CONTAINING SAME WHICH COMPRISES CONTACTING SAID OIL AT ELEVATED TEMPERATURE SIMULTANEOUSLY WITH ADSORBENT CLAY AND AT LEAST ONE NITROGENOUS REAGENT FROM THE GROUP CONSISTING OF AMMONIA, MONO-ALKYLAMINES, DIALKYLAMINES, TRIALKYLAMINES, DIAMINES AND HYDRAZINES, BOILING BELOW 212*F., SAID CLAY AND REAGENT BEING USED IN SUCH AMOUNTS AS TO SYNERGISTICALLY EFFECT THE REMOVAL OF NAPHTHENIC ACID FROM THE OIL BY ADSORPTION ON THE CLAY, SEPARATING THE CLAY CONTAINING ADSORBED CONSTITUENTS FROM THE OIL, WASHING THE SEPARATED CLAY WITH A LIGHT HYDROCARBON SOLVENT TO REMOVE OIL FROM THE CLAY, HEATING THE WASHED ADSORBENT IN A CURRENT OF INERT GAS AT A TEMPERATURE OF 400-550*F., EXTRACTING NAPHTHENIC ACIDS FROM THE ADSORBENT, AFTER HEATING, WITH A LIGHT HYDROCARBON SOLVENT, AND STRIPPING THE SOLVENT FROM THE NAPHTHENIC ACIDS.
Claim 2
Dependent Claim
131 words
A PROCESS FOR SEPARATING NAPHTHENIC ACIDS FROM A PETROLEUM OIL CONTAINING SAME WHICH COMPRISES CONTACTING SAID OIL AT ELEVATED TEMPERATURE SIMULTANEOUSLY WITH ADSORBENT CLAY AND AT LEAST ONE NITROGENOUS REAGENT FROM THE GROUP CONSISTING OF AMMONIA, MONO-ALKYLAMINES, DIALKYLAMINES, TRIALKYLAMINES, DIAMINES AND HYDRAZINES, BOILING BELOW 212*F., SAID CLAY AND REAGENT BEING USED IN SUCH AMOUNTS AS TO SYNERGISTICALLY EFFECT THE REMOVAL OF NAPHTHENIC ACID FROM THE OIL BY ADSORPTION ON THE CLAY, SEPARATING THE CLAY CONTAINING ADSORBED CONSTITUENTS FROM THE OIL, WASHING THE SEPARATED CLAY WITH A LIGHT HYDROCARBON SOLVENT TO REMOVE OIL FROM THE CLAY, HEATING THE WASHED ADSORBENT IN A CURRENT OF INERT GAS AT A TEMPERATURE OF 400-550*F., EXTRACTING NAPHTHENIC ACIDS FROM THE ADSORBENT, AFTER HEATING, WITH A LIGHT HYDROCARBON SOLVENT, AND STRIPPING THE SOLVENT FROM THE NAPHTHENIC ACIDS.
References Cited (Backward Citations)
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Cited
US2301528A
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US2186249A
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US2738314A
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US2795535A
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DE934887C
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US2808431A
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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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |