Rhodium/Iridium complex Catalyzed Methanol Carbonylation:Study the Effects of Various Parameters on Carbonyl Impurities Concentration

Acetic acid is an important industrial commodity chemical that prepared by various methods. Among currently employed processes one of the most useful commercially is the Celanese acid optimization (AO) method. In this research, we evaluated the AO process flow sheet based on a simulation by Hysis 3.1 and then studied the effect of various parameters on production of by products. The results show that the increasing the concentration of carbon monoxide causes the increasing the formation of propionic acid instead the acetaldehyde. Achieved results have shown a maximum point for acetaldehyde in 40% w/w of Carbon monoxide feed. Study the effects of methanol and lithium iodide concentration show that the increasing of methanol up to 30% w/w causes the increasing by-product concentration instead lithium iodide. Investigation of water content in 2-5% w/w shows that increasing of water content causes to increasing of propionic acid concentration instead of acetaldehyde.

کلیدواژه ها:

Acetis acid ، methanol carbonylation ، acetaldehyde