Polynitrogenous derivatives and their metallic complexes which can be used for oxygen fixation

摘要

Polynitrogenous derivatives comprising four or five coordinating functions capable of bonding with a metal atom, especially with cobalt. The invention concerns, more particularly, the use of metal complexes comprising said derivatives for the implementation of processes for recovering oxygen from a medium capable of containing this element, whereby the oxygen is, in a first stage, absorbed on the metallic complex, then, in a second stage, desorbed from said complex and recovered in an appropriate receptacle.