中文摘要：

目的研究用双氧水为氧化剂，选择性氧化环己酮制己内酯。方法以30％（体积分数）的双氧水为氧化剂，钨酸钠与含O的双齿有机配体（草酸）形成的络合物为催化剂，在无有机溶剂、无相转移剂下，用环己酮氧化制己内酯，并用GC—MS跟踪了氧化过程中两种主要物质环己酮、己内酯含量随反应时间的变化关系。结果最佳反应条件为凡（钨酸钠）：凡（草酸）：凡（环己酮）：凡（30％的双氧水，体积分数）为2．0：3．3：100：350，在92℃下反应7h，可制得63．6％（质量分数）的己内酯，其选择性达97．2％。结论该氧化反应产率高，选择性好。

英文摘要：

Aim Synthesis of ε-caprolactone form cyclohexanone. Methods Using the peroxotungstate complexes formed in situ from sodium tungstate dihydrate and oxalic acid as a catalyst, the oxidation of cyclohexanone to C-caprolactone with 30% aqueous hydrogen peroxide was studied, in which the organic solvent, halide and phase transfer catalyst was not applied. The influences of reaction condition on the oxidation reaction, such as temperature, solvent, catalyst, ligand and so on were investigated. Simultaneously, the contents of medial oxidation products along with the reaction time, cyclohexanone and ε-caprolactone were also detected by GC-MS. Results The optimum condition was confirmed that the molar ratio of tungstate dihydrate, oxalic acid, cyclohexanone and 30% H2O2 in the reaction mixture was of 2. 0： 3.3： 100： 350. After the mixture was stirred at 90 -92℃ for7 hours, the reaction mixture had a measurement of 63. 6% of ε-caprolactone by GC. Conclusion The results show the product of ε-caprolactone is moderate while the selectivity is high.