METHOD FOR RING-HYDROGENATION OF METHYLENEDIANILINE

摘要

PROBLEM TO BE SOLVED: To improve a catalytic process for the ring-hydrogenation of a methylenedianiline feed stock containing crude methylenedianiline. SOLUTION: The invention provides a pretreatment process performed by passing a crude methylenedianiline feed stock on a ruthenium catalyst supported on a fixed bed support, cooling without deaeration, hydrogenating the pretreated crude methylenedianiline feed stock on a rhodium catalyst or a mixed Rh/Ru catalyst supported on a monolith support and carrying out ring-hydrogenation by a batch reaction, and provides a catalyst composed of rhodium and ruthenium and supported on a monolith support. COPYRIGHT: (C)2006,JPO&NCIPI