Apparatus for the solvent extraction of aromatic hydrocarbons fr

Details Apparatus for the solvent extraction of aromatic hydrocarbons fr Apparatus for the solvent extraction of aromatic hydrocarbons fr

1980-10-17

1982-06-22

Garris, Bradley

Mineral oils: apparatus

Solvent extraction

202158, 210511, 422256, B01D 1104, C10C 308

Patent

active

043361064

ABSTRACT:
A multiple stage extractor column for the countercurrent contact of an upwardly moving hydrocarbon phase and a downwardly moving solvent phase is disclosed. The column is particularly useful for the solvent extraction of aromatics from a hydrocarbon feedstock containing C.sub.9 aromatics. The contactor column embodies an upper extraction section comprising a first plurality of perforated extraction trays and a backwash section comprising a second plurality of perforated extraction trays, said second plurality of trays being vertically spaced apart a greater distance than the trays of said first plurality whereby the solvent/hydrocarbon interface at the bottom of the column is more readily controlled.

REFERENCES:
patent: 2139871 (1938-12-01), Wilson et al.
patent: 3143482 (1964-08-01), MeLeod et al.
patent: 3361664 (1968-01-01), Broughton et al.
patent: 3433735 (1969-03-01), Broughton
patent: 3979281 (1976-09-01), Gerhold
patent: 4039389 (1977-08-01), Christman
Kirk-Otmer; vol. 9; pp. 691-693; 1978.

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