Abstract: Oxidation of styrene to benzaldehyde catalyzed by Dawson-type dilacunary heteropoly compound K₁₀Na₂H₂P₂W₁₆O₆₀ using H₂O₂ as oxidant and acetone as solvent was investigated. The results showed that the main product was benzaldehyde and a little by-products were styrene oxide and phenylacetaldehyde. The conversion of styrene was 95.4% and the selectivity of benzaldehyde was 95.6% when reacting at molar ratio of catalyst∶styrene ∶ H₂O₂ being 1∶100∶300，reaction temperature 65 ℃ and reaction time 10 h. The merits of this process were easy separation of benzaldehyde，no use of chloride compounds and poisonous heavy metal. The purity of obtained benzaldehyde met food-grade standard.

摘要： 考察了在丙酮中以过氧化氢为氧化剂，二缺位Dawson型杂多化合物K₁₀Na₂H₂P₂W₁₆O₆₀为催化剂氧化苯乙烯合成苯甲醛的反应。发现该工艺中主要生成苯甲醛，少量副产物是环氧苯乙烷和苯乙醛等。在催化剂、苯乙烯、过氧化氢摩尔比为1∶100∶300的条件下，65 ℃反应10 h，苯乙烯转化率达95.4 %，苯甲醛选择性为95.6 %。该工艺产物分离简便，不使用含氯原料和有害的重金属，苯甲醛可达食品级标准。