US2869978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of gas purification utilizing an amine solution and an anti-corrosion agent
Assignee: Union Oil Company of California
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Filing: 1955-09-26
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Granted: 1959-01-20
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Expires: 1975-09-26
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:34
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/14; C10K1/143; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/526
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A PROCESS FOR SEPARATING ACIDIC GASES OF THE CLASS CONSISTING OF CARBON DIOXIDE AND HYDROGEN SULFIDE FROM A GAS MIXTURE WHEREIN SAID MIXTURE IS CONTACTED WITH AN ABSORBENT COMPRISING AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF WATER-SOLUBLE ALIPHATIC AMINES AND ALKANOLAMINES WHICH ARE FREE FROM CARBOXYL AND CARBONYL GROUPS AND WHICH BOIL ABOVE ABOUT 212*F., THE IMPROVEMENT WHICH CONSISTS IN ADDING TO SAID ABSORBENT BETWEEN ABOUT 0.05% AND ABOUT 0.5% OF THE PRODUCT OBTAINED BY REACTING ONE PART BY WEIGHT OF A WATER-SOLUBLE HYDROXY ALIPHATIC DICARBOXYLIC ACID HAVING 4 TO 5 CARBON ATOMS PER MOLECULE WITH BETWEEN ABOUT 1 AND ABOUT 2 PARTS BY WEIGHT OF ANTIMONY TRIHALIDE AND SUFFICIENT ALKALI METAL HYDROXIDE TO PRODUCE A PRODUCT HAVING A PH OF BETWEEN ABOUT 3.0 AND 4.5, SAID REACTION BEING EFFECTED IN THE PRESENCE OF BETWEEN ABOUT 15 AND ABOUT 30 PARTS BY WEIGHT OF WATER.
Claim 2
Dependent Claim
151 words
IN A PROCESS FOR SEPARATING ACIDIC GASES OF THE CLASS CONSISTING OF CARBON DIOXIDE AND HYDROGEN SULFIDE FROM A GAS MIXTURE WHEREIN SAID MIXTURE IS CONTACTED WITH AN ABSORBENT COMPRISING AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF WATER-SOLUBLE ALIPHATIC AMINES AND ALKANOLAMINES WHICH ARE FREE FROM CARBOXYL AND CARBONYL GROUPS AND WHICH BOIL ABOVE ABOUT 212*F., THE IMPROVEMENT WHICH CONSISTS IN ADDING TO SAID ABSORBENT BETWEEN ABOUT 0.05% AND ABOUT 0.5% OF THE PRODUCT OBTAINED BY REACTING ONE PART BY WEIGHT OF A WATER-SOLUBLE HYDROXY ALIPHATIC DICARBOXYLIC ACID HAVING 4 TO 5 CARBON ATOMS PER MOLECULE WITH BETWEEN ABOUT 1 AND ABOUT 2 PARTS BY WEIGHT OF ANTIMONY TRIHALIDE AND SUFFICIENT ALKALI METAL HYDROXIDE TO PRODUCE A PRODUCT HAVING A PH OF BETWEEN ABOUT 3.0 AND 4.5, SAID REACTION BEING EFFECTED IN THE PRESENCE OF BETWEEN ABOUT 15 AND ABOUT 30 PARTS BY WEIGHT OF WATER.
References Cited (Backward Citations)
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US1964696A
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US1915148A
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US2031632A
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US2473735A
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US2472400A
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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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |