US2661266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen fluoride treating system
Assignee: Standard Oil Co
•
Filing: 1951-04-28
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Granted: 1953-12-01
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Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 James E Friden
- 👤 William A Shire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:48
CPC Classifications
C; C10; C10G; C10G17/00; C10G17/02; C10G17/04; C10G17/07; C01; C01B; C01B7/00; C01B7/19; C01B7/191
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF REMOVING IMPURITIES IN A HYDROGEN FLUORIDE TREATMENT SYSTEM WHEREIN A HYDROCARBON CONTAINING DISSOLVED WATER AND SULFUR COMPOUNDS IS CONTACTED WITH HYDROGEN FLUORIDE UNDER CONDITIONS TO FROM RAFFINATE AND EXTRACT PHASES AND SAID PHASES ARE SEPARATELY STRIPPED IN STRIPPING ZONES TO REMOVE SUBSTANTIALLY ALL HYDROGEN FLUORIDE, WATER, HYDROGEN SULFIDE AND NORMALLY GASEOUS HYDROCARBONS THEREFROM AS STRIPPER OVERHEAD STREAMS, WHICH METHOD COMPRISES PARTIALLY CONDENSING AT LEAST ONE OF SAID STRIPPER OVERHEAD STREAMS TO OBTAIN A LIQUID AQUEOUS HYDROGEN FLUORIDE STREAM AND A GASEOUS HYDROGEN FLUORIDE STREAM CONTAINING H2S, EXTRACTIVELY DISTILLING SAID AQUEOUS HYDROGEN FLUORIDE STREAM WITH CONCENTRATED SULFURIC ACID BY INTRODUCING SAID CONCENTRATED SULFURIC ACID AT
Claim 2
Independent Claim
107 words
THE METHOD OF REMOVING IMPURITIES IN A HYDROGEN FLUORIDE TREATMENT SYSTEM WHEREIN A HYDROCARBON CONTAINING DISSOLVED WATER AND SULFUR COMPOUNDS IS CONTACTED WITH HYDROGEN FLUORIDE UNDER CONDITIONS TO FROM RAFFINATE AND EXTRACT PHASES AND SAID PHASES ARE SEPARATELY STRIPPED IN STRIPPING ZONES TO REMOVE SUBSTANTIALLY ALL HYDROGEN FLUORIDE, WATER, HYDROGEN SULFIDE AND NORMALLY GASEOUS HYDROCARBONS THEREFROM AS STRIPPER OVERHEAD STREAMS, WHICH METHOD COMPRISES PARTIALLY CONDENSING AT LEAST ONE OF SAID STRIPPER OVERHEAD STREAMS TO OBTAIN A LIQUID AQUEOUS HYDROGEN FLUORIDE STREAM AND A GASEOUS HYDROGEN FLUORIDE STREAM CONTAINING H2S, EXTRACTIVELY DISTILLING SAID AQUEOUS HYDROGEN FLUORIDE STREAM WITH CONCENTRATED SULFURIC ACID BY INTRODUCING SAID CONCENTRATED SULFURIC ACID AT
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) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |