Study of changes in valence state of chromium in aluminum-chromium catalysts under the influence of aliphatic imino compounds by the EPR method

1. The EPR method was used to study the change in the valence state of chromium in aluminum-chromium catalysts under the influence of hydrogen and aliphatic imino compounds. 2. In the temperature range 20–400° the imines are stronger reducing agents of Cr6+ and Cr5+ compounds than hydrogen.