磷钨酸掺杂聚苯胺催化剂催化合成丁酮乙二醇缩酮

Catalytic Synthesis of Butanone Ethylene Ketal with H_3PW_(12) O_(40)/PAn

报道了磷钨酸掺杂聚苯胺催化剂H3PW1 2 O4 0 /PAn的制备 ,通过丁酮和乙二醇反应合成了丁酮乙二醇缩酮 ,探讨了磷钨酸掺杂聚苯胺催化剂对缩酮反应的催化活性 ,较系统地研究了原料量比、催化剂用量、反应时间诸因素对产品收率的影响。实验表明 :磷钨酸掺杂聚苯胺催化剂是合成丁酮乙二醇缩酮的良好催化剂 ,在n(乙二醇 )∶n(丁酮 ) =2∶1,催化剂用量为反应物料总质量的 0 .5 %,环己烷为带水剂 ,反应时间 2 .5h的优化条件下 ,丁酮乙二醇缩酮的收率可达 67.2 %。

Butanone ethylene ketal was synthesized from butanone and ethylene glycol in the presence of H 3PW 12 O 40 /PAn. The factors influencing the synthesis were discussed and the best conditions were found out. The optimum conditions are: molar ratio of ethylene glycol to butanone is 2∶1, the quantity of catalyst is equal to 0.5% of feed stocks, and the reaction time is 2.5 h. H 3PW 12 O 40 /PAn is an excellent catalyst for synthesizing butanone ethylene ketal and its yield can reach over 67.2%.