Mineral oils: processes and products – Fractionation – Deasphalting
Reexamination Certificate
2011-07-19
2011-07-19
Nguyen, Tam M (Department: 1771)
Mineral oils: processes and products
Fractionation
Deasphalting
C208S045000, C208S087000, C208S187000
Reexamination Certificate
active
07981277
ABSTRACT:
A method for dewatering and deasphalting a hydrocarbon feed is provided. A hydrocarbon feed containing one or more hydrocarbons, asphaltenes and water can be mixed or otherwise combined with one or more solvents. The addition of the solvent sufficiently decreases the density of the hydrocarbon feed to enable gravity settling of the water phase, providing an oil phase containing one or more hydrocarbons, asphaltenes and solvents. The asphaltenes can be separated from the oil phase to provide an asphaltene mixture containing asphaltenes and a portion of the solvents and a deasphalted oil containing one or more hydrocarbons and the balance of the solvents. The solvents can be separated from the asphaltenes and deasphalted oil, and recycled to the initial mixing step wherein the solvent is mixed or otherwise combined with one or more solvents.
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Floyd Raymond
Subramanian Anand
KBR IP Legal Dept.
Kellogg Brown & Root LLC
Nguyen Tam M
LandOfFree
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