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Limitations of some esterification techniques in structural studies of kerogen-derived acids

✍ Scribed by K.G. McLaren

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
413 KB
Volume
183
Category
Article
ISSN
0003-2670

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✦ Synopsis

Oxidative degradation techniques for characterizing kerogens in oil shales often lead to major yields of precipitated acids (PA), which are less amenable than soluble acid products to analysis by gas chromatography/mass spectrometry (g.c./m.s.). A PA complex produced by oxidation of a Julia Creek (Queensland) kerogen was studied by applying four different esterification techniques before g.c./m.s. Methods based on reaction with diazomethane or boron trifluoride/methanol were of limited effectiveness. Reaction with dimethyl sulphate in acetone with potassium carbonate catalyst led to the detection of by far the widest range of components in the PA complex. This method is recommended for esterifying acid products derived from kerogen, especially in comparative characterization studies of kerogens.

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