Means for and methods of deasphalting low sulfur and hydrotreate

Details Means for and methods of deasphalting low sulfur and hydrotreate Means for and methods of deasphalting low sulfur and hydrotreate

1992-01-23

1993-09-07

Myers, Helane

Mineral oils: processes and products

Fractionation

Deasphalting

208 86, 208 81, 208 89, 208 92, 208 94, 208144, 208221, 208222, 208314, 208315, 208317, 208339, C10G 5304, C10G 5302

Patent

active

052425789

ABSTRACT:
A refining process uses a two or four stage solvent separator coupled to receive an incoming feedstream of low sulfur resid and a solvent. In the preferred two stage separator, the mixture at the top of the first separator stage is fed to the second stage separator via a heat exchanger. The mixture at the bottom of the first stage separator includes resins and asphaltenes which are fed to a hydrotreater and then, in turn, to a fractionator. The output from the bottom of this fractionator can be fed back to the resid feedstream of the first stage separator for recycled separation. The material at the top of the second stage separator is fed back through the heat exchanger where it helps heat the mixture fed from the top of the first to the second stage separator, this feedback recovers the solvent for reuse in the first stage. The material settling to the bottom of the second stage separator is fed into a catalytic cracker or processed elsewhere.

REFERENCES:
patent: 4572781 (1986-02-01), Krasuk et al.
patent: 4752376 (1988-06-01), Pachano et al.
patent: 4752382 (1988-06-01), Eidem
patent: 4810367 (1989-03-01), Chombart et al.
patent: 4940529 (1990-07-01), Beaton et al.
patent: 5013427 (1991-05-01), Mosby et al.
patent: 5024750 (1991-06-01), Sughrue et al.

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