Method of controlling a process of acetic acid

摘要

A method of controlling a process for producing acetic acid by carbonylation of methanol or carbonylatable aderived thereof, comprising the steps of: monitoring the production rate of acetic acid; reduce the production rate in response to uncambio in operating conditions outside the normal operating range of a; after reducing lavelocidad production, control the process to reduced production rate; and increase production velocidadde after boarding the change in operating conditions until at least lavelocidad production again said normal operating range; wherein for at least one of lospasos to slow production, control the process to reduced production rate, yaumentar production speed until the production rate again said operativonormal interval, the process is controlled by multivariable control not linear based on a process model, endonde process control is during the change and / or during a recovery period programs after approached the change and where the change in operating conditions a alteraciónsignificativa the selected process group should that consisting of: (a) a substantial reduction in ladisponibilidad carbon monoxide; (B) failure of a pump catalyst; (C) loss of cooling capacity or decalentamiento; (D) flooding a subsequent purification column; (E) desviacionessignificativas of expected compositions in one or more streams associated with depurificación column; (F) a lack of storage capacity for acetic acid product; and combinations thereof delas.