Benzoate Liquid Phase Catalytic Oxidation Of Phenol

Phenol, as a essential industrial chemical, is widely used in many fields. This paper expounds kinds of properties and developing condition of phenol; introduces the synthetic methods of phenol; specializes the new developments in the toluene/benzoic acid oxidation. We investigate the techno-economic analysis. The results indicate the yield time in the toluene/benzoic acid oxidation is about two years. So the method by toluene oxidation can gain better profits and has better potential for development. In this paper, we calculate some questions on the thermodynamics of benzoic acid catalytic oxidation in the liquid phase. The reaction can be spontaneous carry on to the productions, and the selection is about 100%; benzoic acid can approximately react in the whole. The kinetics of pyrolysis of cupric benzoate in benzoic acid melt is studied. The pyrolysis of cupric benzoate in benzoic acid melt conforms to fast pseudo second order reaction regime, and is two order with respect to cupric concentration. The activity energy is about 7 KJ, and the half life in 200-240 is 40 min. We also explore the mechanism of phenol formation by benzoic acid catalytic oxidation in the liquid phase. The catalyses in the benzoic acid oxidation process are also studied. The pyrolytic property of manganese benzoate is similar to that of cupric benzoate. The elements of IA IIA IIB can promote the pyrolysis. Among its magnesium oxide shows the best result. The molar ratio between Cu(II) and Mg(II) and amounts of catalyst, as two prominent factors, are studies. When Mg(II) is excess between Cu(II)/Mg(II), the conversion rate is better. When Cu(II) is excess between Cu(II)/Mg(II), the selectivity is better. n(CuO):n(MgO)= 1:1.5; the amount of CuO in the system is about 7.3%(mol). The yields of phenol are 80-85% under this condition in a 2L agitated stainless steel reactor. Purification of products and reuse of input material and catalyst are studies. The product amounts to state standard by melt point and IR spectra analysis.