Boots – shoes – and leggings
Patent
1978-10-19
1980-09-23
Ruggiero, Joseph F.
Boots, shoes, and leggings
196 1452, 208311, 208DIG1, 422 62, G06G 758, C10G 2100
Patent
active
042246733
ABSTRACT:
A refining unit treats heavy 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 analyzing the heavy sour charge oil and providing corresponding signals, a refractometer samples the charge oil and provides a signal corresponding to the RI, sensors sense the flow rates of the charge oil and the MP 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 MP flow rates is controlled in accordance with the signals from all the analyzers, the refractometer and all the sensors, while the other flow rate of the heavy sour charge oil and the MP flow rates is constant.
REFERENCES:
patent: 3686488 (1972-08-01), Woodle
patent: 3718809 (1973-02-01), Woodle
patent: 3799871 (1974-03-01), Sequiera, Jr.
patent: 4053744 (1977-10-01), Woodle
Barger Frank L.
Sequeira, Jr. Avilino
Gillespie Ronald G.
Kulason Robert A.
Ries Carl G.
Ruggiero Joseph F.
Texaco Inc.
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