US2825740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acetic acid
Assignee: Distillers Co Yeast Ltd
•
Filing: 1954-10-01
•
Granted: 1958-03-04
•
Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
- 👤 Armstrong Godfrey Paul
- 👤 Millidge Alfred Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:40
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A CONTINUOUS PROCESS FOR THE PRODUCTION OF ACETIC ACID WHICH COMPRISES OXIDISING PARAFFINIC HYDROCARBONS OF 4-8 CARBON ATOMS IN THE LIQUID PHASE AT TEMPERATURE OF ABOUT 150-200*C. AND AT SUPERATMOSPHERIC PRESSURE WITH MOLECULAR OXYGEN, CONTINUOUSLY COOLING AND SEPARATING THE LIQUID REACTION MIXTURE INTO TWO LAYERS, RETURNING THE UPPER LAYER CONTAINING UNREACTED HYDROCARBON TO THE OXIDIZATION ZONE, DISTILLING COMPONENTS OF THE LOWER WATER LAYER CONTAINING THE ACETIC ACID, RECOVERING ACETIC ACID, AND RETURNING THE PORTION BOILING UP TO ABOUT 99*C. IN THE PRESENCE OF WATER TO THE OXIDIZATION ZONE, THE THROUGHPUT RATES OF THE OXYGEN AND THE REACTANTS BEING SUCH THAT THE RATIO OF THE WEIGHT OF THE OXYGEN TAKEN UP PER HOUR TO THE WEIGHT OF THE FRESH HYDROCARBON FED PLUS THE WEIGHT OF THE DISTILLATE RETURNED TO THE OXIDATION ZONE PER HOUR IS FROM ABOUT 1 TO 0.5.
Claim 2
Dependent Claim
139 words
A CONTINUOUS PROCESS FOR THE PRODUCTION OF ACETIC ACID WHICH COMPRISES OXIDISING PARAFFINIC HYDROCARBONS OF 4-8 CARBON ATOMS IN THE LIQUID PHASE AT TEMPERATURE OF ABOUT 150-200*C. AND AT SUPERATMOSPHERIC PRESSURE WITH MOLECULAR OXYGEN, CONTINUOUSLY COOLING AND SEPARATING THE LIQUID REACTION MIXTURE INTO TWO LAYERS, RETURNING THE UPPER LAYER CONTAINING UNREACTED HYDROCARBON TO THE OXIDIZATION ZONE, DISTILLING COMPONENTS OF THE LOWER WATER LAYER CONTAINING THE ACETIC ACID, RECOVERING ACETIC ACID, AND RETURNING THE PORTION BOILING UP TO ABOUT 99*C. IN THE PRESENCE OF WATER TO THE OXIDIZATION ZONE, THE THROUGHPUT RATES OF THE OXYGEN AND THE REACTANTS BEING SUCH THAT THE RATIO OF THE WEIGHT OF THE OXYGEN TAKEN UP PER HOUR TO THE WEIGHT OF THE FRESH HYDROCARBON FED PLUS THE WEIGHT OF THE DISTILLATE RETURNED TO THE OXIDATION ZONE PER HOUR IS FROM ABOUT 1 TO 0.5.
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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |