Dawson型磷钨杂多盐催化氧化苯乙烯制苯甲醛

化工进展

Dawson型磷钨杂多盐催化氧化苯乙烯制苯甲醛

李家其，尹笃林，徐琼，郭军，周辉，陈萌

湖南人文科技学院化学与材料科学系；化学生物学及中药分析教育部重点实验室，湖南师范大学精细催化合成研究所

出版日期:2008-07-05 发布日期:2008-07-05

Oxidation of styrene to benzaldehyde catalyzed by Dawson-type tungstophosphate

LI Jiaqi，YIN Dulin，XU Qiong，GUO Jun，ZHOU Hui，CHEN Meng

Department of Chemistry and Material Science，Hunan Institute of Humanities，Science and Technology；Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research，Ministry of Education，Institute of Fine Catalysis and Synthesis，Hunan Normal University

Online:2008-07-05 Published:2008-07-05

摘要/Abstract

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。

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.

李家其，尹笃林，徐琼，郭军，周辉，陈萌. Dawson型磷钨杂多盐催化氧化苯乙烯制苯甲醛 [J]. 化工进展.

LI Jiaqi，YIN Dulin，XU Qiong，GUO Jun，ZHOU Hui，CHEN Meng. Oxidation of styrene to benzaldehyde catalyzed by Dawson-type tungstophosphate[J]. Chemical Industry and Engineering Progree.