焦磷酸铜催化氧化环己烷合成环己酮的研究

Study of catalytic oxidation of cyclohexane over Cu2P2O7

摘要:

采用沉淀法制备了磷酸铜、焦磷酸铜和三聚磷酸铜催化剂。以环己烷氧化为探针反应，过氧化氢为氧化剂，考察了催化剂、溶剂种类、溶剂用量、催化剂用量、氧化剂用量、反应温度以及反应时间的影响，并提出了氧化反应机理。结果表明：焦磷酸铜的催化活性最高，在乙腈用量10 mL，环己烷用量8 mmol，焦磷酸铜用量0.0300 g，w（H2O2）=30%的双氧水用量3.00 mL，反应温度65 ℃的条件下，反应10 h后，环己烷的转化率为54.1%，醇酮的收率分别为21.3%和32.8%。

Abstract:

Cu3(PO4)2, Cu2P2O7, Cu5(P3O10) were synthesized by precipitation method. The oxidation of cyclohexane hydrogen peroxide was used as a probe reaction to investigate the influence of catalyst, the sorts and amounts of solvent, catalyst dosage, oxidant dosage, the reaction temperature and time and propose the oxidation mechanism. The results showed that Cu2P2O7 was exhibited the highest catalytic activity, using 10 mL of acetonitrile, 8 mmol of cyclohexane, 0.0300 g of Cu2P2O7 catalyst, 3.00 mL of w (H2O2)=30% hydrogen peroxide at temperature of 65 ℃ for 10 h, the cyclohexane conversion was 54. 1%, the cyclohexanol and cyclohexanone yield were 21.3% and 32.8%, respectively.