Patent US2698285A successfully refreshed from Google Patents.
US2698285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of organic acids by azeotropic distillation
Assignee: MW Kellogg Co
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Filing: 1949-05-28
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Granted: 1954-12-28
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Expires: 1969-05-28
Abstract
No abstract record available.
Inventors
- 👤 William P Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:43
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/43; C07C51/44; C07C51/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A METHOD FOR SEPARATING ORGANIC ACIDS HIGHER BOILING THAN PROPANOL FROM AN AQUEOUS MIXTURE CONTAINING NON-ACID OXYGENATED ORGANIC COMPOUNDS NOT HIGHER BOILING AND NON-ACID OXYGENATED ORGANIC COMPOUNDS HIGHER BOILING THAN PROPANOL AND CAPABLE OF FORMING WATERAZEOTROPES, SAID MIXTURE HAVING BEEN OBTAINED AS A WATERPRODUCT CONDENSATE PRODUCED BY THE CATALYTIC HYDROGENATION OF OXIDES OF CARBON, WHICH COMPRISES: IN A FIRST DISTILLATION TOWER, DISTILLING SAID MIXTURE IN THE PRESENCE OF SUFFICIENT WATER TO PREVENT ESTERIFICATION TO OBTAIN A LOWBOILING FRACTION COMPRISING NON-ACID OXYGENATED ORGANIC COMPOUNDS NOT HIGHER BOILING THAN PROPANOL AND A HIGHBOILING FRACTION CONSISTING ESSENTIALLY OF ORGANIC ACIDS AND NON-ACID OXYGENATED ORGANIC COMPOUNDS HIGHER BOILING THAN PROPANOL; WITHDRAWING EACH OF SAID FRACTIONS FROM SAID DISTILLATION TOWER; IN A SECOND DISTILLATION TOWER, DISTILLING SAID HIGH-BOILING FRACTION IN THE PRESENCE OF SUFFICIENT WATER TO PREVENT ESTERIFICATION TO OBTAIN A HIGHBOILING FRACTION COMPRISING ORGANIC ACIDS AND A LOW-BOILING FRACTION COMPRISING WATER-AZEOTROPES OF NON-ACID OXYGENATED ORGANIC COMPOUNDS; WITHDRAWING EACH OF SAID
Claim 2
Independent Claim
156 words
A METHOD FOR SEPARATING ORGANIC ACIDS HIGHER BOILING THAN PROPANOL FROM AN AQUEOUS MIXTURE CONTAINING NON-ACID OXYGENATED ORGANIC COMPOUNDS NOT HIGHER BOILING AND NON-ACID OXYGENATED ORGANIC COMPOUNDS HIGHER BOILING THAN PROPANOL AND CAPABLE OF FORMING WATERAZEOTROPES, SAID MIXTURE HAVING BEEN OBTAINED AS A WATERPRODUCT CONDENSATE PRODUCED BY THE CATALYTIC HYDROGENATION OF OXIDES OF CARBON, WHICH COMPRISES: IN A FIRST DISTILLATION TOWER, DISTILLING SAID MIXTURE IN THE PRESENCE OF SUFFICIENT WATER TO PREVENT ESTERIFICATION TO OBTAIN A LOWBOILING FRACTION COMPRISING NON-ACID OXYGENATED ORGANIC COMPOUNDS NOT HIGHER BOILING THAN PROPANOL AND A HIGHBOILING FRACTION CONSISTING ESSENTIALLY OF ORGANIC ACIDS AND NON-ACID OXYGENATED ORGANIC COMPOUNDS HIGHER BOILING THAN PROPANOL; WITHDRAWING EACH OF SAID FRACTIONS FROM SAID DISTILLATION TOWER; IN A SECOND DISTILLATION TOWER, DISTILLING SAID HIGH-BOILING FRACTION IN THE PRESENCE OF SUFFICIENT WATER TO PREVENT ESTERIFICATION TO OBTAIN A HIGHBOILING FRACTION COMPRISING ORGANIC ACIDS AND A LOW-BOILING FRACTION COMPRISING WATER-AZEOTROPES OF NON-ACID OXYGENATED ORGANIC COMPOUNDS; WITHDRAWING EACH OF SAID
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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) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |