Fractional distillation process control

Details Fractional distillation process control Fractional distillation process control

1981-10-01

1984-03-20

Ruggiero, Joseph F.

Boots, shoes, and leggings

196132, 202160, 364157, 364172, G06F 1546, G05B 1142, B01D 342

Patent

active

044384998

ABSTRACT:
In a fractional distillation process in which the designation of the primary product stream changes, the desired composition of the primary product stream and a secondary product stream are maintained without losing automatic control of the process for an extended period of time while the controllers controlling the process are retuned for the new operating conditions. Two sets of tuning constants are available to each controller and these tuning constants are automatically switched as required by the designation of the primary product stream.

REFERENCES:
patent: 3018230 (1962-01-01), Morgan
patent: 3259554 (1966-02-01), Constantikes
patent: 3967937 (1976-07-01), Hobbs
patent: 4265263 (1981-05-01), Hobbs
patent: 4346433 (1982-08-01), Rutledge

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