Process for treating cobalt catalyst in oxidation mixtures of hydrocarbons to dibasic acids

摘要

The present invention relates under a cobalt catalyst and a monobasic acid present such as acetic acid by processing after the catalyst from the oxidation reaction mixture of the zone outside the oxidation takes place in part, to a method and a reactor system for oxidation control of the dibasic acids in the hydrocarbon. One kinds according to a preferred embodiment, the catalyst preferably is reduced predominantly and more preferably at substantially 2 to contain the state of cobalt, is at least partially precipitated by dehydration and / or heat treatment. In another preferred embodiment, the catalyst in the reaction mixture is preferably predominantly and preferably substantially trivalent oxide is held first in a state more, the reaction mixture is dehydrated, the catalyst is preferably lead, and more preferably will substantially take place spontaneously settled in the divalent state are reduced to a predetermined temperature or after additional heat treatment. The precipitated catalyst is preferably playback, either directly or indirectly.