Solvent deasphalting unit and method for using the same

Details Solvent deasphalting unit and method for using the same Solvent deasphalting unit and method for using the same

1996-03-20

1999-08-31

Bhat, Nina

Mineral oils: processes and products

Fractionation

Deasphalting

196 1452, C10C 300, C10C 118, B01D 1100

Patent

active

059449845

ABSTRACT:
An evaporative solvent recovery section operates on a plurality of liquid product streams including a liquid stream of deasphalted oil and solvent, and a liquid stream of asphaltene and solvent produced by a solvent deasphalting unit. Heat is added to one of the streams for producing a heated liquid product stream that is flashed to produce a stream of vaporized solvent, and a stream of reduced solvent liquid product. The stream of reduced solvent liquid product is further processed, without the addition of a significant amount of heat, to vaporize substantially all of the remaining solvent therein, and heat contained in the stream of vaporized solvent is recovered by expanding the stream in a vapor turbine.

REFERENCES:
patent: 4017383 (1977-04-01), Beavon
patent: 4721557 (1988-01-01), Staggs
patent: 4784753 (1988-11-01), Hotier et al.
patent: 5258117 (1993-11-01), Kolstad et al.
patent: 5804060 (1998-09-01), Benguigui et al.

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