USE OF A SUBMERSIBLE VISCOMETER IN THE PRIMARY SEPARATION STEP OF THE HOT WATER PROCESS FOR RECOVERY OF BITUMEN FROM TAR SAND

摘要

"USE OF A SUBMERSIBLE VISCOMETER INTHE PRIMARY SEPARATION STEP OFTHE HOT WATER PROCESS FORRECOVERY OF BITUMEN FROM TAR SAND"ABSTRACT OF THE DISCLOSUREThe hot water process is controlled in response toviscosity measurements taken in situ in the middlings in the primaryseparation vessel. The viscosity in the middlings is found to vary.Therefore, the layer of maximum viscosity is located and the viscosityat this depth is monitored. Adjustments are made to the process to keepthis maximum viscosity below a pre-determined limit.