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- W2068401865 abstract "ABSTRACT Some structural features of the dissolution products from two Turkish lignites ( Beypazari and Tuncbi-lek lignites) have been investigated with proton nuclear magnetic resonance and infra-red spectroscopies and gas chromatography. The results indicate that, in general, no substantial changes occur in the structural characteristics of the soluble products obtained from different extraction conditions. This is true especially for preasphaltene and asphaltene fractions. On the other hand, some structural differences were observed in the compositions of oil fractions especially in the neutral fraction of oils from the different experimental conditions. The neutral oils from the low temperature and short time extractions are mainly consisted of alkylated aromatics and include a very small quantity of longer chain paraffins. Whereas the oils from the extractions at high temperatures and longer times include several long straight-chain paraffins (C15 - C32) with higher quantity. Hydrogen atmosphere is m..." @default.
- W2068401865 created "2016-06-24" @default.
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- W2068401865 date "1991-06-01" @default.
- W2068401865 modified "2023-09-24" @default.
- W2068401865 title "CHARACTERIZATION OF DISSOLUTION PRODUCTS FROM TWO TURKISH LIGNITES BY1H NMR, IR AND GC TECHNIQUES" @default.
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- W2068401865 doi "https://doi.org/10.1080/08843759108942282" @default.
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