Use of a submersible viscometer in the primary separation step of the hot water process for recovery of bitumen from tar sand
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United States of America Patent
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Jan 20, 1987
Grant Date -
N/A
app pub date -
May 3, 1985
filing date -
May 3, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The hot water process is controlled in response to viscosity measurements taken in situ in the middlings in the primary separation vessel. The viscosity in the middlings is found to vary. Therefore, the layer of maximum viscosity is located and the viscosity at this depth is monitored. Adjustments are made to the process to keep this maximum viscosity below a pre-determined limit.
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