Thermal Cracking of Athabasca Oil-Sands Oil Part 2. - Cohesiveness of Carbon Residue from Fluidized Coker Distillate
- D.S. Pasternack (Research Council of Alberta)
- Document ID
- Petroleum Society of Canada
- Journal of Canadian Petroleum Technology
- Publication Date
- September 1964
- Document Type
- Journal Paper
- 91 - 94
- 1964. Petroleum Society of Canada
- 4.3.3 Aspaltenes, 4.1.2 Separation and Treating, 4.1.3 Dehydration, 4.1.5 Processing Equipment, 5.8.5 Oil Sand, Oil Shale, Bitumen
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A continuation of the study of the partial thermal cracking of Athabascaoil-sands oil shows that maximum production of Ramsbottom carbon residue fromthe virgin oil and from its fluidized coker distillate occurs when the oil ordistillate is given an initial heating at about 800 to 825°F prior tocarbonization. Residues representing the high-boiling ends of the fluidizedcoker distillate provide carbon residues which show excellent cohesiveness andpermit the production of hard low-temperature coke from non-caking Drumhellercoal and of very hard pellets (briquets) from hematite and non-cakingDrumheller coal. It is possible that the coke and briquets may be strong enoughto be fired directly into a metallurgical furnace.
The work reported herein represents a continuation of the study of thepartial thermal cracking of Athabasca oil-sands oil and of the usefulness ofthe derived products. It deals with "gum" formation during the storage ofsolutions of the Athabasca oil, the maximum production of carbon residuematerial from the oil and its fluidized coker distillate, and the usefulness ofthe residue from the fluidized coker distillate as a briquetting binder. Aportion of the earlier work has been reported.
Results and Discussion
Gum Formation on Dilution of Toluene Extract of Virgin AthabascaOil
Dehydrated virgin Athabasca oil was diluted with toluene and filtered toremove extraneous mineral matter. Following removal of the toluene by heating,the toluene extract was diluted with 30 parts of kerosene at 280°F, filteredthrough medium-porosity fritted-disk glass filters and the precipitate washed.Table I shows that room-temperature storage of the combined filtrate andwashings results in substantial amounts of precipitate, which may be consideredas "gum" formation.
This stability test was continued for 246 days, by which time 54 per cent ofthe asphaltenes in the virgin oil had become insoluble in kerosene and hadprecipitated out. Cognizance of this feature is important in the storage ofsolutions of the virgin Athabasca oil.
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