Total analysis of mineral wastes containing bitumen, solvent, water and solids

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TypeArticle
Journal titleAOSTRA Journal of Research
Volume1
Pages2129; # of pages: 9
AbstractCompared with the existing methods of analyses a quick and more reliable procedure has been developed to determine the bitumen, solvent, water and solids content of mineral wastes, in order to serve efficiently both plant operations and research needs. Bitumen and hydrocarbon solvent in the samples are extracted using solvents that do not absorb in the CH₃ group region of the ¹H NMR spectrum. Bitumen is then determined spectrophotometrically, and the process solvent by quantitative ¹H NMR. Water is dissolved in methanol and subsequently determined using a Karl Fischer titrator. Solids are measured gravimetrically. This procedure was used to analyse mineral tailings from the centrifuge stage of the hot water process for the extraction of bitumen from oil sands. Results for all four components; bitumen, process solvent, water and solids, had relative standard deviations much lower than the ones obtained using a modified Dean-Stark method. Mineral agglomerates obtained after the extraction of bitumen from oil sands using the solvent extration-spherical agglomeration method, were also analyzed by both methods. As a result of compaction occurring during solids agglomeration, complete extraction of bitumen by the Dean-Stark method could not be achieved. Extraction of bitumen and precision of results were much improved for agglomerated samples using the proposed method of analysis which is amenable to wastes containing solids, water, bitumen and solvent in any proportion.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NRC number23342
NPARC number15657363
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Record identifierafb0935b-2cce-440a-b855-2b84be75d508
Record created2010-06-11
Record modified2016-05-09
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