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Study on the Structures of Sequential Extraction of Yi-Lan Oil-Shale

Author: ZhouYang
Tutor: ZhouGuoJiang
School: Heilongjiang Institute of Science and Technology
Course: Chemical processes
Keywords: Oil Shale sequential extraction extractives structural analysis
CLC: TE621
Type: Master's thesis
Year: 2011
Downloads: 130
Quote: 0
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Abstract


The isolation and analyses of the organic components in oil shale make an important significance in oil shale chemistry research and oil shale efficient utilization. In order to investigate the organic chemical compositions in oil shale, during this issue, the Yilan oil shale from Heilongjiang province was extracted sequentially from under mild condition with low polarity solvent (petroleum ether), middle polarity solvents (toluene, dichloromethane ,chloroform and THF), high polarity solvent (ethanol). At last, the structure of the extractives were analyzed and identified by GC/MS, UV, LC/MS and FTIRThe experimental results of the structural analysis of sequential extracts of Yilan oil shale showed that the main compounds in petroleum ether extracts were C15～C31 n-alkanes. However, the main peak C17 in the carbon oil shale zone (<C21) has no obvious parity exchange principles. According to these illustrations that the algae, fungi and other lower plants input in the Yi-lan oil shale during the early time. In addition, in the high carbon region (>C21), n-alkanes shows a significant parity exchange principles with the peak C27 and C29, this indicates that yi-lan oil shale is abundant in type C3 terrestrial higher plants, oil shale extraction rate of 2.221%;The extracts of toluene were made up by the ramification of benzene and naphthalin. Besides, the measured out biotic tag of n-alkanes have found the Pristine and Hopane. Also, the pristine existence shows that yilan oil shale has gone through a long period of weak oxidation environment in the deposition process. Because the inputting of the bacteria, especially the class Hopane bacteria were verified further by the founder of hopanes, oil shale extraction rate of 1.872%;The special compound tests in the dichloromethane extracts are (z,z)-9,12-octade cadienoic acid, 2,2’-methy -lenebis(4-methyl-6-tert-butylphenol) and Cholesterol, the oil shale extraction rate is 1.712%; the relative abundance of 2,2’-methylenebis(4-methyl- 6-tert -butylphenol) in chloroform extracts was high, and the oil shale extraction rate achieve 1.557%; oxygen derivatives in the THF extractive, the oil shale extraction rate is 2.542%; polymers composed of 113 were separated from the ethanol extractive, and the oil shale extraction rate is 3.281%.During this project, the total oil shale extraction rate of extracted sequentially under mild condition achieved 13.187%. The analysis of all levels extractives showed that the methods of sequential extraction can achieve the separation of component in oil shale, which was benefit to structure analysis of the extractive. Furthermore, it is the basis of experiment from the composition and structure research that besides the extraction of chemicals, and separation from the macromolecular compounds and identifications the classification in oil shale.

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > Basic theory
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