Mineral oils: processes and products – Fractionation – Deasphalting
Patent
1975-05-15
1977-04-12
Levine, Herbert
Mineral oils: processes and products
Fractionation
Deasphalting
196 1452, 208321, C10G 2114
Patent
active
040173836
ABSTRACT:
The energy requirements of a process for the solvent extraction of hydrocarbons from residua are reduced by nearly 50%, and capital requirements reduced substantially by evaporating solvent from extracted hydrocarbons in two or more pressure stages, the first stage evaporation occurring at a pressure sufficiently high to permit condensation of the solvent at a temperature sufficient to be combined with the solvent feed to the extractor at the required extraction temperature.
REFERENCES:
patent: 2010007 (1935-08-01), Bray
patent: 2850431 (1958-09-01), Smith
patent: 3202605 (1965-08-01), Redcay
Levine Herbert
Ralph M. Parsons Company
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