Hydrogenation of meta-toluenediamine

Details Hydrogenation of meta-toluenediamine Hydrogenation of meta-toluenediamine

1993-09-27

1999-10-26

Barts, Samuel

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564450, C07C20900

Patent

active

059732075

ABSTRACT:
This invention relates to an improved process for the preparation of methylcyclohexane diamine wherein meta-toluenediamine is contacted with hydrogen in the presence of a hydrogenation catalyst. The improvement resides in utilizing a hydrogenation catalyst comprising rhodium carried on a support and carrying out the hydrogenation in the presence of a C.sub.3 -C.sub.10 secondary alcohol as a solvent. With the use of rhodium carried on a support as a catalyst, coupled with the use of the secondary alcohol solvent, one obtains high yields with excellent catalyst life.

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