Distillate fractions having boiling ranges of 270–320°C and 320–370°C derived from Heera and Panna crudes are characterized for their average structural parameters using n-d-M method as well as 1h and 13C NMR spectroscopy. It is observed that these fractions contain predominantly saturated carbons. Aromatic carbons in them decreases with the increase in boiling range. Methyl substituents are predominant compared with other alkyl substituents in these distillate fractions.
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Vishnoi et al. (2005) studied this question.
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