METHANOL CARBONYLATION SYSTEM HAVING ABSORBER WITH MULTIPLE SOLVENT OPTIONS

摘要

A methanol carbonylation system (10) includes an absorber tower (75) adapted for receiving a vent gas stream and removing methyl iodide therefrom with a scrubber solvent, the absorber tower being coupled to first and second scrubber solvent sources (16, 56) which are capable of supplying different first and second scrubber solvents. A switching system including valves (90, 92, 94, 96, 98) alternatively provides first or second scrubber solvents to the absorber tower and returns the used solvent and sorbed material to the carbonylation system to accommodate different operating modes.