硅钨钼杂多酸掺杂聚苯胺催化合成苯甲醛乙二醇缩醛

Synthesis of Benzaldehyde Glycol Acetal Catalyzed by Using H_4SiW_6Mo_6O_ 40 PAn

首次报道了以自制的H4SiW6Mo6O40(硅钨钼杂多酸)PAn(聚苯胺)为催化剂采用苯甲醛和乙二醇为原料合成了苯甲醛乙二醇缩醛。实验表明,合成苯甲醛乙二醇缩醛适宜反应条件为:n(苯甲醛)∶n(乙二醇)=1∶1.8,催化剂用量为反应物料总质量的1.0%,环已烷为带水剂,反应时间1.0h。在上述条件下,苯甲醛乙二醇缩醛的收率可达84.0%。由此可见,H4SiW6Mo6O40PAn是合成苯甲醛乙二醇缩醛的优良催化剂,具有良好的应用前景。

Benzaldehyde glycol acetal was synthesized from benzaldehyde and glycol in the presence of H_4SiW_6Mo_6O_ 40 PAn. The factors influencing the synthesis were discussed and the best conditions were found out. The optimum conditions are as follows: molar ratio of benzaldehyde to glycol is 1∶1.8, the quantity of catalyst is equal to 1.0% of feed stock, and the reaction time is 1.0 h. H_4SiW_6Mo_6O_ 40 PAn is an excellent catalyst for synthesizing benzaldehyde glycol acetal and its yield can reach over 84.0%.