脱氢枞胺磷钨酸盐催化1-辛烯的氧化反应研究

以脱氢枞胺（DHA）与Keggin型磷钨酸（HPW）反应制备脱氢枞胺磷钨酸盐（DHPW）．运用红外光谱、紫外光谱对其结构进行表征，并以催化H2O2氧化1-辛烯为探针反应，考察脱氢枞胺磷钨酸盐的催化性能。结果表明，脱氢枞胺磷钨酸盐具有氧化-酸双功能催化作用，能催化H202氧化1-辛烯生成1，2-环氧辛烷、1，2-二羟基辛烷和2-羟基辛烷；在无溶剂或极性溶剂中，1,2-环氧辛烷易发生环氧开环水解反应。选择性较低；在非极性溶剂中，1，2-环氧辛烷的选择性较高．在1,2-二氯乙烷用量为5mL、1-辛烯用量为5mmol、催化剂用量为0．075g、H202用量为5．0mmol、反应温度为30℃、反应时间为3h的条件下。1，2-环氧辛烷的选择性最高，达到90．0％。

Study on Catalytic Oxidation of 1-Octene with Hydrogen Peroxide by Dehydroabietyl Ammonium Phosphotungstate

Dehydroabietyl ammonium phosphotungstate （DHPW） synthesized from dehydroabietyl amine （DHA） and Keggin-type phosphotungstic acid （HPW） has been structurally characterized by IR and UV spec-troscopy,and then its catalytic performance on oxidation of 1-octene is investigated with aqueous 30% hydrogen peroxide under different conditions. The results show that DHPW has an oxidative-acidic bifunctional catalysis for the conversion of 1-octene in the presence of hydrogen peroxide to 1,2-epoxy octane,i, 2-dihydroxy octane and 2-hydroxy-octane,the selectivity of 1,2-epoxy octane in non-polar solvents is relatively high and decreases in free-solvents or polar solvents because 1,2-epoxy octane can he decomposed hy the ring-opening of epoxide. Under the reaction conditions as follows： 1,2-dichloroethane amount is 5 mL, DHPW dosage is 0. 075 g, 1-oc-tene amount is 5 mmol,hydrogen peroxide amount is 5.0 mmol,the reaction temperature is 30 ℃ ,the reaction time is 3 h,the selectivity of 1,2-epoxy octane reaches the maximum value of 90.0%.