US3674839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of glycerol acetates
Assignee: Knapsack AG
•
Filing: 1970-11-25
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Granted: 1972-07-04
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Expires: 1990-11-25
Abstract
Abstract Production of glycerol triacetate and glycerol diacetate by reacting allyl acetate, acetic acid and molecular oxygen at elevated temperatures in liquid phase. The compounds are more particularly produced by reacting a solution of allyl acetate in acetic acid with an oxygen/inert gas-mixture at 80* to 250* C. and under 1 to 200 atm. abs., in the absence of catalysts.
Inventors
- 👤 Wilhelm Vogt
- 👤 Kurt Sennewald
- 👤 Hermann Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:15
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/37; A61K8/375; A61Q; A61Q19/00; C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/48; C07C67/52; C07C67/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
The process as claimed in claim 1, wherein the reaction is carried out at temperatures of between 100* and 200* C and under pressures of between 5and 100atmospheres absolute.
Claim 2
Dependent Claim
22 words
The process as claimed in claim 1, wherein the solution of allyl acetate in acetic acid contains up to 30weight percent water.
Claim 3
Dependent Claim
17 words
The process as claimed in claim 1, wherein the reaction is carried out discontinuously in an autoclave.
Claim 4
Dependent Claim
169 words
The process as claimed in claim 1, wherein the reaction is carried out in continuous fashion by continuously supplying a reaction zone with the allyl acetate solution in acetic acid and the oxygen/inert gas mixture; subjecting the resulting reaction gas leaving the reaction zone overhead to condensation and thereby freeing it from unreacted allyl acetate and acetic acid, and recycling liquid allyl acetate and liquid acetic acid to the reaction zone; mixing residual reaction gas with fresh oxygen and recycling the gas mixture to the reaction zone; continuously removing a crude glycerol acetate mixture from the bottom of the reaction zone; expelling unreacted allyl acetate and acetic acid under reduced pressure near the head of the first distilling zone; condensing the said unreacted allyl acetate and the said acetic acid and recycling them to the reaction zone; removing the glycerol acetates from the base of the first distilling zone; conveying the said glycerol acetates to a second distilling zone and separating them therein into glycerol triacetate and glycerol diacetate.
Claim 5
Dependent Claim
29 words
The process as claimed in claim 5, wherein the carbon oxides present in the recycle gas are allowed to increase therein up to a rate of 95percent by volume.
References Cited (Backward Citations)
US2316604A
Cited
US2911437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |