Mineral oils: apparatus – Solvent extraction
Patent
1978-06-05
1979-08-21
Serwin, R. E.
Mineral oils: apparatus
Solvent extraction
23230A, 364497, 364501, 422 62, C10G 2100, G06G 758
Patent
active
041652592
ABSTRACT:
A furfural refining unit treats heavy sour charge oil with a furfural solvent in a refining tower to yield raffinate and extract mix. The furfural is recovered from the raffinate and from the extract mix and returned to the refining tower. A system controlling the refining unit includes a gravity analyzer, a flash point temperature analyzer, a sulfur analyzer and viscosity analyzers; all analyzing the heavy sour charge oil and providing corresponding signals, sensors sense the flow rates of the charge oil and the furfural flowing into the refining tower and the temperature of the extract mix and provide corresponding signals. One of the flow rates of the heavy sour charge oil and the furfural flow rates is controlled in accordance with the signals from all the analyzers and all the sensors, while the other flow rate of the heavy sour charge oil and the furfural flow rates is constant.
REFERENCES:
patent: 3799871 (1974-03-01), Sequeira, Jr.
patent: 3911259 (1975-10-01), Huddleston et al.
patent: 3972779 (1976-08-01), Harrison
patent: 4053744 (1977-10-01), Woodle
Barger Frank L.
Begnaud John D.
Sequeira, Jr. Avilino
Gillespie Ronald G.
Ries Carl G.
Serwin R. E.
Texaco Inc.
Whaley Thomas H.
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