Continuous process for deasphalting and demetallating a residue from crude oil distillation
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United States of America Patent
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Oct 11, 1994
Issued Date -
N/A
app pub date -
Apr 19, 1993
filing date -
Mar 22, 1991
priority date (Note) -
Expired
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Abstract
A continuous process for deasphalting and demetallating a residue from crude oil distillation, by means of dimethyl carbonate as extraction solvent, comprises: mixing a residue from crude oil distillation with a recycled liquid stream containing oil and dimethyl carbonate, in order to produce a homogeneous solution; cooling said homogeneous solution and separating a refined light, liquid, phase; an extracted middle phase; and a heavy phase containing asphaltenes; recovering a primary, deasphalted/demetallated oil from said light phase; partially recycling said middle phase to the mixing step, and recovering a secondary deasphalted oil from the residual fraction; recovering asphaltenes from said heavy phase.
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