Process for controlling distillation column

Details Process for controlling distillation column Process for controlling distillation column

1984-08-09

1986-11-25

Bashore, S. Leon

Distillation: processes, separatory

With measuring, testing or inspecting

Of concentration

203DIG18, 203 2, 196132, 364501, B01D 342

Patent

active

046247467

ABSTRACT:
A process for controlling a distillation column in which a feedstock is distilled for separation into a product from the top of the column having a first predetermined content of an intended component with a high boiling point and a product from the bottom of the column having a second predetermined content of an intended component with a low boiling point. The process includes the steps of computing a desired value of the flow rate of the product from the bottom of the column in accordance with a material balance and controlling the flow rate of the bottom product in accordance with a corrected desired value which is derived from one of deviations between the actual and desired compositions of the top or bottom products or limit values depending upon the magnitude and direction of the deviations. Reflux of part of the top product to the column is also controlled in accordance with the direction of the deviations and their magnitudes or limiting values.

REFERENCES:
patent: 3018230 (1962-01-01), Morgan
patent: 3449215 (1969-06-01), Johnson et al.
patent: 4473443 (1984-09-01), Hobbs

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