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- W136388603 abstract "This paper describes the physical character and reactions of preasphaltenes made from a bituminous coal. The preasphaltenes were obtained by reacting Illinois No. 6 Burning Star coal in contact with SRC-II heavy distillate under hydrogen pressure in an Autoclave for various times (10 to 30 minutes) and temperatures (350 to 450/sup 0/C). The preasphaltenes were separated by using conventional Soxhlet extraction techniques. The primary question addressed was: Are preashaltenes produced under one set of reaction severities (i.e., 350/sup 0/C for 10 minutes) different than those made at other severities (i.e., 400 or 450/sup 0/C). The extracted preasphaltenes were analyzed for molecular weight, solubility and elemental composition. The chemical reactivities (upgradeability) were studied by further reaction of the extracted preasphaltenes with SRC-II heavy distillate solvent in shaking microreactors at 400/sup 0/C under hydrogen for 0 to 30 minutes. The conversion of the preasphaltenes was followed using a gel permeation liquid chromatographic analytical method. The results indicated that preasphaltenes generated at lower severity were more soluble, more reactive and had a higher molecular weight than those generated at higher severity." @default.
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- W136388603 date "1982-01-01" @default.
- W136388603 modified "2023-10-03" @default.
- W136388603 title "Effects of process severity on physiochemical properties of preasphaltenes" @default.
- W136388603 doi "https://doi.org/10.2172/5320080" @default.
- W136388603 hasPublicationYear "1982" @default.
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