Supercritical selective extraction of hydrocarbons from asphalti

Details Supercritical selective extraction of hydrocarbons from asphalti Supercritical selective extraction of hydrocarbons from asphalti

1980-06-09

1982-10-19

Hearn, Brian E.

Mineral oils: processes and products

Fractionation

Deasphalting

208311, C10C 300

Patent

active

043549284

ABSTRACT:
An asphalt containing petroleum oil is deasphalted and extracted by contacting the oil with a solvent maintained at its critical temperature and pressure. With the solvent at its critical temperature and pressure, extraction of the valuable hydrocarbon oils present in the asphaltic feedstock is effected by way of vapor-liquid phase separation which serves to decompose the metal complexes present in the feedstock, thus reducing the metal content of the extracted hydrocarbon oil. Examples of solvents employed in the process of the invention include C.sub.4 -C.sub.10 cuts of typical refinery streams, benzene, toluene, ethylene glycols and the like. In one process embodiment, promoters or catalyst are employed to further reduce the metal content of the extracted hydrocarbon oil.

REFERENCES:
patent: 2940920 (1960-06-01), Garwin
patent: 2980602 (1961-04-01), Garwin
patent: 3321394 (1967-05-01), Mills
patent: 3507777 (1970-04-01), Hemminger
patent: 3511774 (1970-05-01), Long
patent: 3607716 (1971-09-01), Roach
patent: 3723294 (1973-03-01), Gatsis
patent: 3798157 (1974-03-01), Manzanilla
patent: 4082695 (1978-04-01), Rosinski
patent: 4211633 (1980-07-01), Gleim
patent: 4239216 (1980-12-01), Gearhart

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