US2690993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of organic acids from oxygenated organic compounds by azeotropic distillation with water
Assignee: MW Kellogg Co
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Filing: 1948-10-28
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Granted: 1954-10-05
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Expires: 1968-10-28
Abstract
No abstract record available.
Inventors
- 👤 Henry G Mcgrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/43; C07C51/44; C07C51/46; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A METHOD FOR SEPARATING THE COMPONENTS OF A SUBSTANTIALLY HYDROCARBON-FREE MIXTURE COMPRISING A WATER-SOLUBLE ORGANIC ACID AND AN ALCOHOL WHICH ARE CLOSE-BOILING AND WHICH ALCOHOL IS CAPABLE OF FORMING AN AZEOTROPE WITH WATER LOWER BOILING THAN SAID ACID AND WHICH MIXTURE IF DISTILLED IN THE ABSENCE OF WATER WOULD PRODUCE A DISTILLATE CONTAINING A SUBSTANTIAL PROPORTION OF SAID ACID, WHICH COMPRISES CHARGING SAID MIXTURE INTO A FRACTIONAL DISTILLATION ZONE, CHARGING WITH SAID MIXTURE WATER IN A SUBSTANTIAL AMOUNT INTO SAID ZONE, SUBJECTING SAID MIXTURE AND WATER TO FRACTIONAL DISTILLATION TO FORM A VAPOR PHASE AND A LIQUID PHASE, AND REMOVING SAID ALCOHOL AS A VAPOROUS FRACTION FROM THE UPPER PORTION OF SAID ZONE AND A LIQUID RESIDUE COMPRISING SAID ACID FROM THE LOWER PORTION OF SAID ZONE BEING QUANTITY OF WATER CHARGED INTO SAID ZONE BEING SUFFICIENT TO PRODUCE A BOTTOMS FRACTION IN WHICH WATER IS PRESENT IN AT LEAST A MAJOR PROPORTION.
Claim 2
Independent Claim
153 words
A METHOD FOR SEPARATING THE COMPONENTS OF A SUBSTANTIALLY HYDROCARBON-FREE MIXTURE COMPRISING A WATER-SOLUBLE ORGANIC ACID AND AN ALCOHOL WHICH ARE CLOSE-BOILING AND WHICH ALCOHOL IS CAPABLE OF FORMING AN AZEOTROPE WITH WATER LOWER BOILING THAN SAID ACID AND WHICH MIXTURE IF DISTILLED IN THE ABSENCE OF WATER WOULD PRODUCE A DISTILLATE CONTAINING A SUBSTANTIAL PROPORTION OF SAID ACID, WHICH COMPRISES CHARGING SAID MIXTURE INTO A FRACTIONAL DISTILLATION ZONE, CHARGING WITH SAID MIXTURE WATER IN A SUBSTANTIAL AMOUNT INTO SAID ZONE, SUBJECTING SAID MIXTURE AND WATER TO FRACTIONAL DISTILLATION TO FORM A VAPOR PHASE AND A LIQUID PHASE, AND REMOVING SAID ALCOHOL AS A VAPOROUS FRACTION FROM THE UPPER PORTION OF SAID ZONE AND A LIQUID RESIDUE COMPRISING SAID ACID FROM THE LOWER PORTION OF SAID ZONE BEING QUANTITY OF WATER CHARGED INTO SAID ZONE BEING SUFFICIENT TO PRODUCE A BOTTOMS FRACTION IN WHICH WATER IS PRESENT IN AT LEAST A MAJOR PROPORTION.
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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) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |