METHOD FOR REDUCING RAG LAYER VOLUME IN STATIONARY FROTH TREATMENT
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United States of America Patent
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Issued Date -
Jan 8, 2015
app pub date -
Jul 2, 2013
filing date -
Jul 2, 2013
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Abandoned
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Abstract
A method for reducing rag layer volume in a stationary bitumen froth treatment process is provided, comprising subjecting dilfroth having a naphtha diluent to bitumen ratio of about 0.7 to gravity settling in a splitter vessel to produce an overflow stream of raw dilbit and an underflow stream of splitter tails; mixing the splitter tails with a naphtha diluent to give a mixture having a naphtha diluent to bitumen ratio of less than about 6:1 in a scrubber feed tank; and subjecting the mixture to gravity settling and agitation in a scrubber vessel to produce an overhead stream of scrubber hydrocarbons and an underflow stream of scrubber tails.
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