NON-AQUEOUS EXTRACTION AND SEPARATION OF BITUMEN FROM OIL SANDS ORE INCLUDING DEASPHALTING AND WASHING STAGES

Non-aqueous extraction (NAE) processes for producing bitumen from oil sands ore are described. The process can include subjecting the oil sands to a bitumen extraction stage, separating a solvent diluted bitumen material from a solvent diluted tailings material, subjecting the solvent diluted tailin...

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Hauptverfasser: MCFARLANE, RICHARD, CHENG, ROY, ABBASPOUR, ALI, HOSSEINI ANVARI, MONIR, BLEILE, JOHN, VAEZI GHOBAEIYEH, FARID, HUQ, IFTIKHAR, NIKOOYEH, KASRA, CAO, JIAYI CLAIRE, DOUCETTE, BRIAN, VAN DER MERWE, SHAWN, SETH, DEEPYAMAN
Format: Patent
Sprache:eng ; fre
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Zusammenfassung:Non-aqueous extraction (NAE) processes for producing bitumen from oil sands ore are described. The process can include subjecting the oil sands to a bitumen extraction stage, separating a solvent diluted bitumen material from a solvent diluted tailings material, subjecting the solvent diluted tailings material to a washing stage using a paraffinic wash solvent to produce a wash liquor and washed tailings, implementing two stages of solvent deasphalting in series, and supplying the second solvent diluted deasphalted bitumen to the washing stage. The asphaltene material can be subjected to a solid-liquid separation stage to remove precipitated asphaltenes from solvent diluted bitumen and produce asphaltene-depleted solvent diluted bitumen that is then supplied to the washing stage. A stream containing paraffinic solvent and deasphalted oil can be recycled to the extraction stage from the washing stage as a predominant source of paraffinic solvent and deasphalted oil to assist in the extraction of bitumen.