A process for the reduction and/or removal of permanganate reducing compounds formed by the carbonylation of methanol in the presence of a Group VIII metal carbonylation catalyst to produce acetic acid is disclosed. More specifically, a process for reducing and/or removing permanganate reducing compounds or their precursors from intermediate streams during the formation of acetic acid by said carbonylation processes is disclosed. In particular, a process in which a low boiling overhead vapor stream from a light ends column is subjected to a single distillation to obtain an overhead that is subjected to an extraction to selectively remove and/or reduce PRCs from the process is disclosed.
申请公布号
EP2902380(B1)
申请公布日期
2017.03.22
申请号
EP20150000741
申请日期
2006.04.06
申请人
Celanese International Corporation
发明人
Zinobile, Raymond, J.;Scates, Mark, O.;Makelki, Jonathan, A.;Salado, Manuel