Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Preparation of benzoquinones by oxidation of phenols
 Process for preparing benzoquinones by oxidation of phenols in the presence of a diluent and of an oxygen-transferring catalyst which contains a heavy metal ion bound in a complex, wherein oxygen, hydrogen peroxide, a compound which liberates hydrogen peroxide, an organic hydroperoxide, a percarboxylic acid or peroxomonosulfuric acid or salts thereof are used as oxidizing agent, and wherein the oxygen-transferring catalyst is from the class of iron, manganese or chromium tetraaza14!annulenes. 
BASF Aktiengesellschaft
C C B B C C C B B B
C07C C07C B01J B01J C07C C09B C07C B01J B01J B01J
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Thomas
Gessner