Results 121 to 130 of about 901 (164)
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A kinetic study of Meyers' desulphurization of asphaltite
Fuel, 1989Abstract Cizre asphaltite was leached in acidic ferric chloride solutions. The parameters affecting conversion of pyrite disseminated in asphaltite to sulphate were investigated and a mathematical model having these parameters was derived to define the leaching process.
ONGANER, Yavuz, ALKAN, M, KOCAKERIM, MM
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Rheological Properties of Asphaltite−Water Slurries
Energy & Fuels, 2006In this study, the rheological characteristics of asphaltite−water slurries (AWSs) were investigated with respect to some of the most important parameters in the preparation of slurries. The effects of pulp density, chemical addition, pulp pH, and particle size on the rheological behavior and viscosity of AWSs were studied. The role of demineralization
HİÇYILMAZ, Cahit +2 more
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Chemistry for Sustainable Development
Results of the comparative gas chromatographic - mass spectrometric analysis of the structural-group and molecular compositions of nitrogen-containing basic compounds, isolated by acid extraction from the deasphaltisates of high-sulphur natural ...
R. V., S. S
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Results of the comparative gas chromatographic - mass spectrometric analysis of the structural-group and molecular compositions of nitrogen-containing basic compounds, isolated by acid extraction from the deasphaltisates of high-sulphur natural ...
R. V., S. S
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Road bitumen's based on the vacuum residue of heavy oil and natural asphaltite: Part I – chemical composition [PDF]
, 2017 © 2017 Taylor & Francis Group, LLC. This work is devoted to studying the possibility of producing bitumen for road construction by using vacuum residue > 420°C of heavy oil of the Ashal'chinskoe field in and natural asphaltite Spiridonovskoe field ...
G. Kayukova +4 more
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Minacar asphaltite: an asphaltite from Argentina
Fuel, 1972Abstract Minacar asphaltite, an asphaltic pyrobitumen or fossilized asphalt, has interesting characteristics. Its provenance, physical and chemical properties, analyses, ash characteristics, solvent extraction, carbonization products, and possibilities for improving the coke made from it are outlined.
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Asphaltites: Composition and Conversion
1995Turkey has insignificant reserves of crude oil and natural gas. Consequently, the amount of foreign currency spent on importation of petroleum and electricity is equivalent to the total exportation from the country. The increasing trend in crude oil prices, is an important threat to the industrialisation of Turkey.
Y. Yurum, E. Ekinci
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High-sulfur asphaltites of Argentina
Solid Fuel Chemistry, 2007The results of advanced study of the chemical nature of asphaltites from Rafaelita and Toribia fields, as well as the composition and structural features of their malthene, asphaltene-carbene, and carboid components are presented. It was found that the structural units in the molecules of isolated compounds are primarily based on fused tetra-and ...
V. V. Savel’ev +4 more
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Thermal liquefaction of natural asphaltites
Solid Fuel Chemistry, 2007Thermal transformations of high-sulfur asphaltites of Argentina were studied over a wide range of their heat treatment conditions: the final heating temperature from 350 to 600°C, the nature of the solvent used (water, deacon, tetragon, straight-run petroleum diesel distillates, the process mode (batch or flow), and the presence of a catalyst.
V. V. Savel’ev +4 more
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Recovery of Uranium, Nickel, Molybdenum, and Vanadium from Floated Asphaltite Ash
Separation Science and Technology, 2004 In this study, asphaltite ash obtained from asphaltite was sulfurized under an autoclave condition, and then this sample was floated by two different xanthates.
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Thermal destruction of asphaltites in supercritical fluids
Russian Journal of Physical Chemistry B, 2010The processes of thermal destruction of asphaltites recovered from the Rafaelita and Toribia deposits in the presence of water, benzene, tetralin, and ethanol in the supercritical state are studied. The solvent nature plays an important role in the thermal destruction, with the maximum conversion (99 wt %) of both asphaltites into liquid products being
V. V. Saveliev, A. K. Golovko
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