| Summary: | 碩士 === 國立成功大學 === 化學工程研究所 === 81 === A new photosesitive naphthoquinone diazide CoAPO-5 was found
to be an effect catalyst for the liquid oxidation of
cyclohexane with oxygen as the oxidatant and with glacial
acetic acid as the solvent. The effect of operating
parameters such as catalyst loading,temperature, oxygen
pressure and kinds of solvents on reaction rate and products
distribution were studied. CoAPO-5 has strong oxidizing
ability. It can catalyze the one-step liquid phase
oxidation of cyclohexane without adding any promoter and co-
reactant.Under our reaction conditions ,no induction period
was observed.The main products of reaction were
cyclohexanone, cyclohexanol and dibasic acid (adipic acid
,glutaric acid and succinic acid). The fractional yield of
dibasic acid ranges from 0.35 to 0.55,that of cyclohexanone
is 0.3 to 0.45 ,and cyclohexanol is 0.08 to 0.15. This
catalyst can be reused several times,because it still has the
structure of CoAPO-5 after reaction. Solvent plays an
important role in these reaction system. Those with a carboxyl
group such as acetic acid, propionic acid, n-butyric acid and
n-pentanonic acid can effectively promotethese oxidation
reactions. Conversion of cyclohexane is higher when
propionic acid is used as solvent.
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