Recovery of wax from Neyveli lignite tar and its structural characterization

Tiwari, Kaushal K.; Banerji, S.N.; Bandopadhyay, Anup Kumar; Bhattacharya, Rabi

doi:10.1016/0016-2361(95)98353-g

Cited by 11 publications

(2 citation statements)

References 9 publications

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“…Therefore, coal upgrading is necessary for LRCs to reduce moisture and increase calorific value . In the meantime, LRCs can be used to produce high value‐added chemicals such as humic acids and lignite wax . To develop efficient methods for the industrial utilization of LRCs, it is necessary to understand the molecular characteristics of LRCs in advance.…”

Section: Introductionmentioning

confidence: 99%

Insight into molecular characteristics of a Chinese coal via separation, characterization, and data processing

Fan

Dong

et al. 2019

J of Separation Science

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Dayan lignite was subjected to thermal dissolution sequentially with cyclohexane, acetone, and methanol. Each thermal dissolution extract was subjected to further separation/enrichment using column chromatography, which was sequentially eluted with petroleum ether, a mixture of ethyl acetate and petroleum ether (vol:vol = 1:1), and ethyl acetate. The three thermal dissolution extracts and nine enrichment subfractions were characterized by an Orbitrap mass spectrometry equipped with an atmospheric pressure chemical ionization ion source. The mass spectrometry data were also statistically analyzed by principal component analysis, which can reduce the dimensionality of data and classify multiple samples according to principal components. Identified compounds in the extracts and subfractions are classified into eight classes according to the heteroatom distribution. Hydrocarbon class is mainly presented in the petroleum ether fraction, and oxygen class, nitrogen class, and oxygen‐nitrogen class are distributed in both petroleum ether/ethyl acetate and ethyl acetate subfractions. The combination of different analytical methods enhances the understanding of coal at the molecular level and provides important data for downstream refining processes.

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Section: Introductionmentioning

confidence: 99%

Insight into molecular characteristics of a Chinese coal via separation, characterization, and data processing

Fan

Dong

et al. 2019

J of Separation Science

View full text Add to dashboard Cite

show abstract

“…Characterization and utilization of coal lipoids, waxes, resins and montan wax as chemical raw materials has had a long time history in our country and abroad [17][18][19]. Attention has been paid mainly to the structure and properties of the lignite, particularly of liptinite rich coal and wax materials [20][21][22][23][24][25][26], in relation to coal processing [27] and petroleum production potential [28,29].…”

Section: Introductionmentioning

confidence: 99%