## Abstract A gas chromatographic method for the determination of fatty acid methyl esters with four or more double bonds in biodiesel was developed and tested. The method is based on gas chromatographic separation on a wax capillary column using methyl tricosanoate as internal standard. The perfor
Comparative Study of the Polymerization of Oleic Acid with Its Methyl Ester in an Azeotropic Saltbath
✍ Scribed by Koley, S. N.
- Publisher
- John Wiley and Sons
- Year
- 1971
- Weight
- 414 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0931-5985
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✦ Synopsis
Oleic acid and its methyl ester were passed through an azeotropic salt bath consisting of 53 " / o KNO,, 40 O / o NaNO, and 7 0 / 0 NaNO, at a varying rate at 3200 C. Oleic acid was bodied better than its ester. But there is some decarboxylation in the bodied oleic acid. The oleic acid may be polymerized through the interaction of hydroxyl and oxirane as well as of carboxyl and oxirane groups with the formation of ether and ester respectively. The bodied methyl oleate also contains ester, ether and epoxide groups.
Vergleihende
Untersuhung iiber die Polymerisation von UIsäure und Methyloleat in einem azeotropen Calzbad Olsäure und Methyloleat wurden bei 320° C und verschiedenen Durchsatzraten durch ein aus 53"/0 KNO,, 400/0 NaNO, und 7 O / o NaNO, bestehendes azeotropes Salzbad geleitet. Die ÜIsäure lie5 sich leichter eindicken als Methyloleat, jedoch findet bei der Olsäure in gewisscm Umfang eine Decarboxylierung statt. Die Olsäure wird wahrscheinlich durch Reaktionen zwischen der Hydroxyl-und Oxirangruppe sowie zwischen Carboxyl-und Oxirangruppen polymerisiert, wobei Äther bzw. Ester gebildet werden. Audi das polymerisierte Methyloleat enthält Ester-, Äther-und Epoxygruppen. ' CH (CH,), . CH, HO,C. (CH,), / F. 0. Barret et a1.4 heated oleic or monounsaturated fatty acids at about 23OOC in the presence of about
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