C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/618, 260/571
C07C 39/08 (2006.01) C07C 43/13 (2006.01) C07C 47/04 (2006.01)
Patent
CA 1149415
ABSTRACT OF THE DISCLOSUR Equimolar amounts of phenol and formaldehyde may be prepared from oxygen and toluene. The catalytic oxidation of toluene, when carried out in the presence of acetic anhydride, forms phenyl acetate and methylene diacetate. Pyrolycis of these two intermediates yields phenol and formaldehyde. Significant improvements in this process are achieved when the first stage of the reaction is carried out in the presence of MoO3. In a further embodiment of this invention it has been found that Group VIII dithiosemibenzil compounds, part- icularly nickel dithiosemibenzil, serves as a superior pro- moter for the toluene oxidation reaction. In still a further embodiment of this invention it has been found that persulfate promoters such as potassium persulfate, persulfuric acid, or Caro's dry acid are parti- cularly effective promoters for the toluene oxidation reaction. In a like manner, hydroquinone or resorcinol may be obtained from cresyl acetates. In a further embodiment of this invention it has been found that benzylidene acetate may be converted to phenyl acetate and methylene diacetate by acid-catalyzed reaction in the presence of oxygen and acetic anhydride.
406536
Lyons James E.
Shinn Robert W.
Suld George
Gowling Lafleur Henderson Llp
Sun Tech Inc.
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