depleted stream application_number US 201314034245 A description for the purpose of this description a single reference number will be assigned to a line as well as a stream carried in that line same reference numbers refer to the same or similar elements fig1 schematically shows a simplified process scheme of a first embodiment according to the present invention for extracting bitumen i e in the context of the invention a bituminous and or extremely heavy crude oil like material from an oil sand stream the process scheme is generally referred to with reference number 1 the process scheme 1 shows a crusher 2 a de oxygenation unit 3 a mixer 4 a solid liquid separator such as a settler or hydrocylone 5 a rejects dryer 6 a filter 7 a dryer 8 a clarifier 9 a src solvent recovery column 11 a further mixer 12 a second clarifier 13 and a dryer 14 an optional further mixer 15 has been indicated as well to which e g all or part of stream 190 may be fed during use of the process scheme of fig1 an oil sand stream 10 is provided and fed to the mixer 4 typically before entering the mixer 4 the oil sand stream 10 has been crushed e g in crusher 2 or treated otherwise to reduce the size of the larger oil sand lumps to below a pre determined upper.