N-Methyl-2-pyrrolidone refining unit control system

Details N-Methyl-2-pyrrolidone refining unit control system N-Methyl-2-pyrrolidone refining unit control system

1978-10-19

1979-09-11

Serwin, R. E.

Mineral oils: apparatus

Solvent extraction

364497, 364501, 422 62, C10G 2100, C06G 758

Patent

active

041674510

ABSTRACT:
A system controls a refining unit in which the refining unit includes an extractor receiving N-methyl-2-pyrrolidone solvent, hereafter referred to as MP, and charge oil, one of which is at a predetermined flow rate while the other flow rate is to be controlled and providing raffinate and extract mix. The control system includes sensors sensing the flow rate, the gravity, the viscosity, the refractive index and the sulfur content of the charge oil. Other sensors sense the flow rate of the MP and the temperature of the extract mix. The signals from the sensors are provided to control apparatus which controls the other flow rate of the charge oil and the MP flow rates in accordance with the signals from the sensors.

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

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