C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/489, 260/571
C07C 39/04 (2006.01) C07C 45/36 (2006.01) C07C 45/54 (2006.01) C07C 47/04 (2006.01) C07C 67/05 (2006.01) C07C 69/12 (2006.01)
Patent
CA 1146966
ABSTRACT OF THE DISCLOSURE 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. Pyrolysis of these two intermediates yields phenol and fomaldehyde. 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 ? found: ???? pr?f?, ? c-d, c ???? cularly effective promoters for the ?luen? x? ?? In a like manner, hydroquinone ? ? may be obtained from cresyl acetates. In a furhter embodiment of this invention is 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.
323630
Lyons James E.
Shinn Robert W.
Suld George
Gowling Lafleur Henderson Llp
Sun Tech Inc.
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