Patent US3878231A successfully refreshed from Google Patents.
US3878231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylation of symmetrical diglycerides with fatty acid anhydride
Assignee: SCM Corp
•
Filing: 1973-11-12
•
Granted: 1975-04-15
•
Expires: 1993-11-12
Abstract
Abstract Stereospecific triglycerides are prepared by a solvent-free acylation of symmetrical diglycerides. Acylation of the free hydroxyl group on the symmetrical diglyceride is accomplished by heating the diglyceride in the presence of a high aliphatic fatty acid anhydride at a temperature slightly above the melting point temperature of the mixture to form liquid phase reactants. Acylation takes place by maintaining a liquid phase reaction and converting the symmetrical diglyceride to stereospecific triglyceride.
Inventors
- 👤 James Harwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:42
CPC Classifications
C; C11; C11C; C11C3/00; C11C3/04; C11C3/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
109 words
A SOLVENT-FREE, NON-CATALYTIC ACYLATING PROCESS FOR CONVERTING A SYMETRICAL 1,3-DIGLYCERIDE HAVING A SECONDARY HYDROXYL INTO A STEREOSEPCIFIC TRIGLYCERIDE HAVING COMPRISING: PROVIDING A SYMMETRICAL 1,3-DIGYLCERIDE HAVING INDENTICAL FATTY ACID RADICALS ON THE GLYCERIDE AND SELECTED FROM STEARIC FAATTY ACID AND PLAMITIC FATTY ACID; MIXING PRIOR TO HEATING SAID SYMMETRICAL 1,3-DIGLYCERIDE WITH A MOLAR EXCESS OF FATTY ANHYDRIDE SELECTED FROM STEARIC ANHYDRIDE, PLAMITIC ANHYDRIDE. AND OLEIC ANHYDRIDE; MODERATELY HEATING SAID MIXTURE AT ABOUT 70*C TO FORM A LIQUID PHASE REACTION MIXTURE; HEATING SAID LIQUID MIXTURE AT TEMPERATURE BETWEEN ABOUT 70*C AND 200*C FOR TIME SUFFICIENT TO SUBSTANTIALLY COMPLETELY ACYLATE SAID SECONDARY HYDROXYL WITH SAID FATTY ANHYDRIDE TO FORM A STEREOSPECIFIC TRIGLYCERIDE.
Claim 2
Dependent Claim
109 words
A SOLVENT-FREE, NON-CATALYTIC ACYLATING PROCESS FOR CONVERTING A SYMETRICAL 1,3-DIGLYCERIDE HAVING A SECONDARY HYDROXYL INTO A STEREOSEPCIFIC TRIGLYCERIDE HAVING COMPRISING: PROVIDING A SYMMETRICAL 1,3-DIGYLCERIDE HAVING INDENTICAL FATTY ACID RADICALS ON THE GLYCERIDE AND SELECTED FROM STEARIC FAATTY ACID AND PLAMITIC FATTY ACID; MIXING PRIOR TO HEATING SAID SYMMETRICAL 1,3-DIGLYCERIDE WITH A MOLAR EXCESS OF FATTY ANHYDRIDE SELECTED FROM STEARIC ANHYDRIDE, PLAMITIC ANHYDRIDE. AND OLEIC ANHYDRIDE; MODERATELY HEATING SAID MIXTURE AT ABOUT 70*C TO FORM A LIQUID PHASE REACTION MIXTURE; HEATING SAID LIQUID MIXTURE AT TEMPERATURE BETWEEN ABOUT 70*C AND 200*C FOR TIME SUFFICIENT TO SUBSTANTIALLY COMPLETELY ACYLATE SAID SECONDARY HYDROXYL WITH SAID FATTY ANHYDRIDE TO FORM A STEREOSPECIFIC TRIGLYCERIDE.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the liquid phase mixture is moderately heated for about 1 hour.
References Cited (Backward Citations)
US3410881A
Cited
US3689514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |