Mineral oils: apparatus – Solvent extraction
Patent
1978-10-19
1979-10-02
Serwin, R. E.
Mineral oils: apparatus
Solvent extraction
364497, 364501, 422 62, C10G 2100, C06G 758
Patent
active
041697669
ABSTRACT:
A refining unit treats light sour charge oil with N-methyl-2-pyrrolidone solvent, hereafter referred to as MP, in a refining extractor to yield raffinate and extract mix. The MP is recovered from the raffinate and from the extract mix and returned to the refining extractor. A system controlling the refining unit includes a gravity analyzer, a sulfur analyzer and viscosity analyzers; all sampling the light sour charge oil and providing corresponding signals. Sensors sense the flow rates of the charge oil and the MP flowing into the extractor and the temperature of the extract mix and provide corresponding signals. One of the flow rates of its light sour charge oil and the MP flow rates is controlled in accordance with the signals from all the analyzers and all the sensors, while the other flow rate of the light sour charge oil and the MP flow rates is constant.
REFERENCES:
patent: 3799871 (1974-03-01), Sequeira et al.
patent: 3911259 (1975-10-01), Huddleston et al.
patent: 3972779 (1976-03-01), Harrison
patent: 4053744 (1977-10-01), Woodle
Barger Frank L.
Sequeira, Jr. Avilino
Gillespie Ronald G.
Ries Carl G.
Serwin R. E.
Texaco Inc.
Whaley Thomas H.
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