英语翻译Several metal-based homogeneous catalysts have been used

英语翻译
Several metal-based homogeneous catalysts have been used [3–7].Murahashi et al.have recently patented the oxidation of alkanes and cycloalkanes into the corresponding alcohols and ketons in the presence of aldehydes using a Cu-based catalyst and nitrogen containing compounds [8].Industrially the cyclohexane is oxidized by air (15 Atm) at 160 °C in the presence of cobalt naphtenate as homogeneous catalyst,giving cyclohexanone and cyclohexanol with good selectivity (80 %) at low conversion (1–10 %) [9,10].Since cyclohexanone and cyclohexanol are more reactive than the cyclohexane reactant,it is difficult to achieve high conversion and selectivity simultaneously.