Solvent extraction of elemental sulfur from coal and a determination of its source using stable sulfur isotopes

Hackley, Keith C.; Buchanan, D.H.; Coombs, Kenneth J.; Chaven, C.; Kruse, C.W.

doi:10.1016/0378-3820(90)90083-5

Cited by 14 publications

(2 citation statements)

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“…Liang (2001) observed significant amouts of octathiocane in two Chinese coals, but to our knowledge, few reports, if any, have been issued on identification of hexathiane from any sediment. Elemental sulphur in coals has been reported previously (Hackley et al, 1990;Gryglewicz and Rutkowski, 2001), but its origin is a matter of controversy; it may exist as elemental sulphur in coal, or it may be an oxidative product from pyrites. In a previous paper (Cao et al, 2007b), our group reported a significant intensity of octathiocane identified from a Chinese oil shale and suggested that octathiocane originally exists in oil shale rather than as a product from CS 2 decomposition.…”

Section: Resultsmentioning

confidence: 96%

Identification of Sulfur- and Nitrogen-containing Organic Species in the Extracts from Pocahontas No. 3 Coal

Cao

Zong

Zhao

et al. 2010

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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Pocahontas No. 3 coal was extracted with CS 2 , n-hexane, benzene, methanol, acetone, and acetone/CS 2 (1:1 vol/vol) mixed solvent sequentially. The resulting six extracts were analyzed with gas chromatography/mass spectrometer (GC/MS). Hexathiane, octathiocane, 23 sulfur-containing organic species, and 21 nitrogencontaining organic species were detected in the extracts. Sulfur-containing organic species detected in the extracts include dialkyl-and disulfides, dimexano, dibenzothiophene, benzonaphthothiophene, and their methyl-derivatives, among which dimexano and dixanthogen were seldom reported in any sediments. Methanol is effective for extracting sulfur-containing organic species without aromatic ring. Most of the nitrogencontaining organic species detected in the extracts are acridinone, carbazole and their methyl-derivatives, benzocarbazoles, amines, phenanthridinone, and piperidinone. The species number of nitrogen-containing organic compounds detected in the extracts increased with the increase in solvent polarity. Different from those reported previously, N and O atoms often coexist in the same compounds in the present study.

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Section: Resultsmentioning

confidence: 96%

Identification of Sulfur- and Nitrogen-containing Organic Species in the Extracts from Pocahontas No. 3 Coal

Cao

Zong

Zhao

et al. 2010

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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“…However, a large number of energies have to be consumed once these methods abovementioned are put to an industrial practice. Thus, extraction, the rest of sulfur recovery way [18], will become a method used to decrease energy consumption under environmental protection with closed cycle of solvent and to get optimized harvest for eligible sulfur product in this work because relevant investigation for those sulfurs extraction from coal coking waste isn't reported so far.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Sulfur Extraction from Coal Coking Waste

Hao¹

2017

AJAC

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Abstract:During coal coking process a great deal of sulfurs are produced and are discarded to surroundings, which makes a lot of lands to be occupied and puts the environment to be polluted. In order to find multi-win production mode of coal coking for resources, surroundings and societies, carbon disulfide as an extracting agent was applied to extract sulfur from sulfur cake in this study. Final laboratory technological condition was that more than 98% sulfur yield could be gotten when the granularity of raw sulfur powder, liquid-solid ratio, extraction temperature, stirring velocity and stirring time respectively were 200 mesh, 3:1 g/g, 40°C, 200rpm and 30 min.

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