Method of Processing Tailings from Solvent-Based Hydrocarbon Extraction
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United States of America Patent
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Issued Date -
Jul 31, 2014
app pub date -
Aug 8, 2012
filing date -
Sep 29, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Described is a method of processing a bituminous feed. The bituminous feed is solvent extracted to form a bitumen-rich stream and a bitumen-lean stream. Solvent is recovered from the bitumen-rich stream to form a bitumen product. Solvent and water are recovered from the bitumen-lean stream to form dry tailings with a moisture content of less than 40 wt.%. The dry tailings are separated into at least two streams, each stream having a moisture content of less than 40 wt. %, based on at least one physical or chemical property. At least one of the at least two streams is then used at an oil sands mine site. In this way, the dry tailings may be used more effectively.
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