Boots – shoes – and leggings
Patent
1987-11-16
1989-09-12
Lall, Parshotam S.
Boots, shoes, and leggings
208 87, 208327, 364500, 364556, G06F 1546, C10G 2116
Patent
active
048666327
ABSTRACT:
The control system and method of the present invention controls a solvent refining unit which treats charge oil with a solvent in a refining tower to yield raffinate and extract-mix, strippers separate the solvent from the raffinate and from the extract-mix to provide refined waxy oil and extract oil, respectively. The solvent is returned to the tower and the refined waxy oil is subsequently dewaxed to provide refined oil. The present invention includes a device which senses the flow rate of the charge oil and provides a corresponding charge oil flow rate signal. The flow rate of the charge oil is controlled in accordance with the charge oil flow rate signal and a control signal. The temperature of the extract oil is sensed and a corresponding temperature signal provided. The temperature signal is used in controlling the temperature of the extract oil in cooperation with a second control signal. A parameter related to the quality of the charge oil and the refined oil and the extract-mix is sensed and corresponding parameter signals provided. A computer provides the first control signal to control the charge oil flow rate and the second control signal to control the temperature in accordance with the sensed charge oil flow rate, the extract oil temperature and the sensed quality parameter signals to achieve an optimum charge oil flow rate-yield operating condition.
REFERENCES:
patent: 3361646 (1968-01-01), MacMullan et al.
patent: 3458432 (1969-07-01), Woodle et al.
patent: 3912618 (1975-10-01), Dryer
patent: 4053744 (1977-10-01), Woodle
patent: 4111218 (1978-09-01), Hobbs
patent: 4162197 (1979-07-01), Sequeira, Jr. et al.
patent: 4262791 (1981-04-01), Lynch et al.
patent: 4371944 (1983-02-01), Stewart et al.
patent: 4390418 (1983-06-01), Sherman
Mead Theodore C.
Morris Betty J.
Gillespie Ronald G.
Kulason Robert A.
Lall Parshotam S.
O'Loughlin James J.
Teska Kevin J.
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