US2797188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining petroleum with an alkanolamine absorbent and reactivation of the spent alkanol amine
Assignee: Dow Chemical Co
•
Filing: 1953-12-04
•
Granted: 1957-06-25
•
Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Carter Taylor
- 👤 Glenn E Prielipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:54
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A METHOD WHICH COMPRISES THE STEP OF CONTACTING AN AQUEOUS SOLUTION OF AN ALKONAL AMINE, WHICH SOLUTION CONTAINS AN ALKANOL AMINE SALT OF AT LEAST ONE ACID WHOSE DISSOCIATION CONSTANT IS GREATER THAN THE DISSOCIATION CONSTANT OF CARBONIC ACID, WITH A STRONGLY BASIC ANION EXCHANGE RESIN HAVING, AS ACTIVE ANION EXCHANGE RADICALS, QUATERNARY ALKYL ALKANOL AMMONIUM HYDROXIDE RADICALS,
Claim 2
Independent Claim
58 words
A METHOD WHICH COMPRISES THE STEP OF CONTACTING AN AQUEOUS SOLUTION OF AN ALKONAL AMINE, WHICH SOLUTION CONTAINS AN ALKANOL AMINE SALT OF AT LEAST ONE ACID WHOSE DISSOCIATION CONSTANT IS GREATER THAN THE DISSOCIATION CONSTANT OF CARBONIC ACID, WITH A STRONGLY BASIC ANION EXCHANGE RESIN HAVING, AS ACTIVE ANION EXCHANGE RADICALS, QUATERNARY ALKYL ALKANOL AMMONIUM HYDROXIDE RADICALS,
Claim 3
Dependent Claim
142 words
IN A METHOD WHICH COMPRISES THE STEPS OF CONTACTING A PETROLEUM HYDROCARBON FLUID CONTAINING AS IMPURITIES THEREIN AT LEAST ONE NORMALLY GASEOUS ACID AND AT LEAST ONE NORMALLY NON-GASEOUS ACID WITH A LIQUID AQUEOUS SOLUTION OF AN ALKANOL AMINE, SEPARATING A LIQUID AQUEOUS SOLUTION OF A ALKALINE AMINE, SEPARATING A LIQUID AQUEOUS SALTS, AND HEATING SUCH SOLUTION TO BOILING WHEREBY NORMALLY GASEOUS ACIDS WHICH IN WATER SOLUTION HAVE A DISSOCIATION CONSTANT NOT GREATER THAN THE DISSOCIATION CONSTANT OF CARBONIC ACID ARE SUBSTANTIALLY EXPELLED FROM A RESIDAL LIQUID AQUEOUS SOLUTION OF AN ALKANOL AMINE CONTAINING AT LEAST ONE ALKANOL AMINE SALT OF AN ACID WHOSE DISSOCIATION CONSTANT IS GREATER THAN THE DISSOCIATION CONSTANT OF CARBONIC ACID, THE IMPROVEMENT THAT COMPRISES CONTACTING SUCH RESIDUAL SOLUTION WIHT A STRONGLY BASIC ANION EXCHANGE RESIN HAVING, AS ACTIVE ANION EXCHANGE RADICALS, QUATERNARY ALKYL ALKANOL AMMONIUM HYDROXIDE RADICALS.
Claim 4
Dependent Claim
142 words
IN A METHOD WHICH COMPRISES THE STEPS OF CONTACTING A PETROLEUM HYDROCARBON FLUID CONTAINING AS IMPURITIES THEREIN AT LEAST ONE NORMALLY GASEOUS ACID AND AT LEAST ONE NORMALLY NON-GASEOUS ACID WITH A LIQUID AQUEOUS SOLUTION OF AN ALKANOL AMINE, SEPARATING A LIQUID AQUEOUS SOLUTION OF A ALKALINE AMINE, SEPARATING A LIQUID AQUEOUS SALTS, AND HEATING SUCH SOLUTION TO BOILING WHEREBY NORMALLY GASEOUS ACIDS WHICH IN WATER SOLUTION HAVE A DISSOCIATION CONSTANT NOT GREATER THAN THE DISSOCIATION CONSTANT OF CARBONIC ACID ARE SUBSTANTIALLY EXPELLED FROM A RESIDAL LIQUID AQUEOUS SOLUTION OF AN ALKANOL AMINE CONTAINING AT LEAST ONE ALKANOL AMINE SALT OF AN ACID WHOSE DISSOCIATION CONSTANT IS GREATER THAN THE DISSOCIATION CONSTANT OF CARBONIC ACID, THE IMPROVEMENT THAT COMPRISES CONTACTING SUCH RESIDUAL SOLUTION WIHT A STRONGLY BASIC ANION EXCHANGE RESIN HAVING, AS ACTIVE ANION EXCHANGE RADICALS, QUATERNARY ALKYL ALKANOL AMMONIUM HYDROXIDE RADICALS.
References Cited (Backward Citations)
US2311342A
Cited
US2497954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |