温和条件下环己烷液相选择性氧化改性VPO催化剂

将La、Ce和Bi改性的钒磷氧化物（VPO）催化剂用于温和条件下液相催化氧化环己烷.发现Bi-VPO催化剂具有较好的液相催化氧化性能；Bi-VPO催化氧化环己烷的优化工艺条件是在10 ml乙腈中加入2 mmol的环己烷、0.01 g (V: 0.068 mmol)的Bi-VPO催化剂，在60 ℃下分次滴加3 ml (26 mmol) H₂O₂，反应12 h，环己烷的转化率为72%，环己酮和环己醇的收率分别为38%和34%.表明改性后的催化剂可大大提高VPO催化剂液相氧化环己烷的催化性能.

LIQUID-PHASE SELECTIVE OXIDATION OF CYCLOHEXANE WITH MODIFIED-VPO CATALYSTS UNDER MILD CONDITION

Elements including La, Ce and Bi were used to modify V-P oxide(VPO)catalyst which were used to catalyze cyclohexane oxidation in the liquid phase.Bi-VPO catalyst showed the best performance in liquid-phase oxidation.2 mmol of cyclohexane in 10 ml of acetonitrile could be well converted at 60℃ for 12 h by adding 3 ml (26 mmol) of H₂O₂, and 72% of cyclohexane conversion rate, 38% of cyclohexanone yield, and 34% of cyclohexanol yield were achieved with 0.01 g (V: 0.068 mmol) of Bi-VPO catalyst.Modified VPO catalysts could greatly enhance the catalytic performance in liquid-phase oxidation of cyclohexane.