Control system for acetic acid manufacturing process

Details Control system for acetic acid manufacturing process Control system for acetic acid manufacturing process

1993-09-29

1994-10-04

McMahon, Timothy M.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

422106, 422110, 422234, 203 1, 562519, 340618, G05D 900, G08B 2100, B01J 800

Patent

active

053524152

ABSTRACT:
A novel control system is provided to control the liquid levels in a reactor-flasher combination used particularly for the carbonylation of methanol to acetic acid. Liquid level control is achieved by proportional controllers or other controllers which do not continuously seek zero off-set from the desired level and which proportionally change the liquid flow rates from the respective reactor and flasher. An adjustment can be made to the level controllers to change the liquid flow rates by a function generator which adjusts the flow rate, according to an empirically derived function which correlates changes in methanol feed rate to liquid flow rates from the reactor and flasher.

REFERENCES:
patent: 3769329 (1973-10-01), Paulik et al.
patent: 4894477 (1990-01-01), Scates et al.
patent: 5001259 (1991-03-01), Smith et al.
patent: 5214203 (1993-05-01), Koyama et al.
patent: 5252295 (1993-10-01), Hovis et al.

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