ISOMERIZATION METHOD OF XYLIDINE

摘要

PROBLEM TO BE SOLVED: To provide useful zeolite as a xylidine-isomerizing catalyst which can efficiently isomerize xylidine with less formation of unfavorable impurities by a side reaction. SOLUTION: Xylidine is contacted with a catalyst containing zeolite whose main cavity entrance comprises a 14-membered oxygen ring. The zeolite whose main cavity entrance comprises a 14-membered oxygen ring is preferably a CFI-type zeolite, and the zeolite comprising a 14-membered oxygen ring (preferably CFI-type zeolite) is preferably an acid-type zeolite. Xylidine can efficiently be isomerized with less formation of the unfavorable impurities by the side reaction by using the catalyst containing such zeolite.