US2759967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous esterification process
Assignee: Distillers Co Yeast Ltd
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Filing: 1953-02-19
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Granted: 1956-08-21
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Expires: 1973-02-19
Abstract
No abstract record available.
Inventors
- 👤 Cash Wilfrid Ernest
- 👤 Gell William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:12
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34; B01D3/343; B01D1/00; B01D1/26; B01D3/14; B01D3/16; B01D3/18; C; C07; C07C; C07C67/00; C07C67/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR THE PRODUCTION OF A NON-VOLATILE ESTER WHICH COMPRISES PASSING A LIQUID REACTION MIXTURE OF AN ALCOHOL AND AN ORGANIC REAGENT SELECTED FROM THE GROUP CONSISTING OF CARBOXYLIC ACIDS, CARBOXYLIC ACID ANHYDRIDES, CARBOXYLIC ACID ESTERS AND NEUTRAL CARBOXYLIC ACID ESTERS OF RELATIVELY VOLATILE ALCOHOLS, TOGETHER WITH AN ESTERIFICATION CATALYST CONCURRENTLY THROUGH A SERIES OF AT LEAST THREE CONSECUTIVE ZONES, SAID ZONES EACH BEING PROVIDED WITH INDEPENDENT HEATING MEANS AND BEING MAINTAINED AT SUCH TEMPERATURES THAT FRACTIONATION OF THE REACTANTS IS SUBSTANTIALLY AVOIDED, PASSING A VAPORIZED ENTRAINER COUNTERCURRENTLY TO THE MIXTURE THROUGH THE LIQUID REACTION MIXTURE IN THE ENTRAINER ENTRANCE ZONE AND INTO SUCCESSIVE ZONES CONTAINING SAID MIXTURE TO AN EXIT NEAR THE ENTRANCE ZONE FOR SAID ALCOHOL AND REAGENT AND WITHDRAWING THE ESTERIFIED PRODUCT FROM ONE OR MORE ZONES IN THE REGION WHERE THE ENTRAINER IS INTRODUCED.
Claim 2
Dependent Claim
139 words
A PROCESS FOR THE PRODUCTION OF A NON-VOLATILE ESTER WHICH COMPRISES PASSING A LIQUID REACTION MIXTURE OF AN ALCOHOL AND AN ORGANIC REAGENT SELECTED FROM THE GROUP CONSISTING OF CARBOXYLIC ACIDS, CARBOXYLIC ACID ANHYDRIDES, CARBOXYLIC ACID ESTERS AND NEUTRAL CARBOXYLIC ACID ESTERS OF RELATIVELY VOLATILE ALCOHOLS, TOGETHER WITH AN ESTERIFICATION CATALYST CONCURRENTLY THROUGH A SERIES OF AT LEAST THREE CONSECUTIVE ZONES, SAID ZONES EACH BEING PROVIDED WITH INDEPENDENT HEATING MEANS AND BEING MAINTAINED AT SUCH TEMPERATURES THAT FRACTIONATION OF THE REACTANTS IS SUBSTANTIALLY AVOIDED, PASSING A VAPORIZED ENTRAINER COUNTERCURRENTLY TO THE MIXTURE THROUGH THE LIQUID REACTION MIXTURE IN THE ENTRAINER ENTRANCE ZONE AND INTO SUCCESSIVE ZONES CONTAINING SAID MIXTURE TO AN EXIT NEAR THE ENTRANCE ZONE FOR SAID ALCOHOL AND REAGENT AND WITHDRAWING THE ESTERIFIED PRODUCT FROM ONE OR MORE ZONES IN THE REGION WHERE THE ENTRAINER IS INTRODUCED.
References Cited (Backward Citations)
US2644009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |