ACETIC ACID PROCESS

摘要

The present disclosure provides for a method for measuring the concentration of one or more components in the reactor or a separation unit of an acetic acid process by both infrared and Raman spectroscopic analyses. In some embodiments, the conditions in the reactor or in any subsequent step of the acetic acid production process are adjusted in response to the measured concentration of one or more components.

主权项

1. A method for the production of acetic acid comprising:
(A) reacting, in a carbonylation reactor and the presence of a carbonylation catalyst, ingredients comprising:
(i) methanol,(ii) carbon monoxide, and(iii) water,to produce a reactor mixture; (B) measuring the concentration of a reference component and a second component in the reactor mixture by both infrared and Raman spectroscopic analyses; (C) determining the Adjusted Ratio of the concentration of the reference component as measured by infrared spectroscopy to the concentration as measured by Raman spectroscopy; (D) calculating the Adjusted Value for the second component by multiplying the concentration of the second component as measured by Raman spectroscopy by the Adjustment Ratio; and (E) modifying a process condition in the carbonylation reactor or a separation unit, based upon the Adjusted Value.