Process for separating mixtures of nitrobenzaldehyde isomers

Details Process for separating mixtures of nitrobenzaldehyde isomers Process for separating mixtures of nitrobenzaldehyde isomers

1995-09-22

1996-10-22

Reamer, James H.

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

Organic compounds

Oxygen containing

C07C 4582

Patent

active

055678548

ABSTRACT:
2- and 3-Nitrobenzaldehydes suitable for use as intermediates for the preparation of pharmaceuticals are obtained in a simple manner and without risk of uncontrolled decompositions by distilling mixtures of nitrobenzaldehyde isomers at bottom temperatures of at most 200.degree. C. in the presence of monomeric and/or polymeric aromatic amines and/or phenols and/or N- and S-containing phenothiazines.

REFERENCES:
patent: 4450297 (1984-05-01), Preiss et al.
patent: 4910345 (1990-03-01), Steicher et al.
Database WPI, week 91 43, AN 91-312686 (1991).
W. Gerhartz, et al., Ullmann's Encyclopedia of Industrial Chemistry, 5th Completely Revised Edition, vol. A3, p. 470. (1986)

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