Patent ID: 9222029
Filing Date: 2015-12-29
Classification: B01D,C10G

Abstract:
1. A method for extracting bitumen from an oil sand feed stream, the method comprising at least the steps of: (a) providing an oil sand feed stream; (b) contacting the oil sand feed stream with a liquid comprising an aliphatic hydrocarbon solvent thereby obtaining a solvent-diluted oil sand slurry; (c) depositing the solvent-diluted oil sand slurry as a filter cake on a filter medium and filtering the solvent-diluted oil sand slurry, thereby obtaining a solids-enriched stream and a filtrate, wherein during the filtering the pressure above the filter cake is at least 1.7 bara; and (d) lowering the pressure of the solids-enriched stream to below 1.2 bara.