Control system for an acetic acid manufacturing process

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

1994-03-11

1994-12-20

Prescott, Arthur C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5112

Patent

active

053747747

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 offset 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. A further adjustment to flow rates can be made to effect a change in the water concentration in the reactor so as to maintain the water concentration at a desired level.

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patent: 4736316 (1988-04-01), Wallman
patent: 5227520 (1993-07-01), Cooper
"Selected Papers from the 10th Triennial World Congress of the International Federation of Automatic Control", Munich, Fed. Rep. of Germany, repreinted from Automatic Control World Congress, pp. 315-320, Jul. 1987.
Designing Multiveriable Control Systems with DCS Software, Shinya Ochiai, Hoechst Celanese, pp. 35-37, Jul. 1992.
"A Case for Multivariable Control", Shiny Ochiai et al, InTech, pp. 67-72, Sep. 1987.

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