H_3PW_(12)O_(40)/Y-β催化苯甲醛1,2-丙二醇缩醛的绿色合成

• 作 者: 程云 杨莹 罗根祥
• 机 构: 辽宁石油化工大学化学化工与环境学部,
• 出 处: 当代化工
• 发表日期: 2014年08期
• 关键词: 苯甲醛 丙二醇 H_3PW 缩醛 复合分子筛 催化剂 重复使用性能 磷钨酸 环己烷用量 环己烷

采用Y-β复合分子筛负载H3PWl2O40为催化剂,对苯甲醛与1,2-丙二醇发生缩合反应合成苯甲醛1,2-丙二醇缩醛进行了研究,考察了催化剂用量、醇醛摩尔比、反应时间、带水剂用量及催化剂重复使用次数等因素对收率的影响。结果表明,该催化剂具有催化性能高,易回收并有较好的重复使用性能等优势。最佳反应条件为:苯甲醛0.1 mol,醇醛摩尔比1.2,催化剂用量0.6 g,带水剂环己烷用量为10 mL,反应40 min后收率为92.3%。

The synthesis of benzaldehyde 1,2-propanediol acetal by condensation reaction of benzaldehyde and 1,2-propanediol was carried out by using H3PWl2O40 supported Y-β composite molecular sieve as catalyst. The effects of catalyst dosage, molar ratio of aldol, reaction time, With the amount of water and catalyst reuse times and other factors on the yield. The results show that the catalyst has the advantages of high catalytic performance, easy recovery and good reusability. The optimal reaction conditions were as follows: 0.1 mol of benzaldehyde, 1.2 mol of aldol, 0.6 g of catalyst and 10 mL of cyclohexane as water-trapping agent. The yield was 92.3% after 40 min reaction.