以活性炭固载三氯化钕为非均相催化剂,对环己醇与乙酸酐之间的酰化反应进行了研究,考察了催化剂用量、醇酐摩尔比、反应时间对乙酸环己酯收率的影响。结果表明,活性炭固载三氯化钕有着较好的催化活性,当乙酸酐的加入量为0.1 m o l,醇酐摩尔比为1.1∶1时,催化剂质量为0.25g,反应30m in后,乙酸环己酯收率可达到92.2%,且催化剂重复使用5次仍保持较高活性,所得产品无色透明,具有很高的纯度。产品经折光率和红外光谱进行了表征。
A new envirmentally-friendly catalyst,PAn-CuCl2 was prepared.Benzaldehyde 1,2-propylene acetalization was synthesized from benzaldehyde and 1,2-propylene alcohol in the presence of polyaniline doped with copper chloride.Factors influencing the product yield were discussed and the optimum conditions were found.Experimental result showed that polyaniline doped with copper chloride is an excellent catalyst.With n(benzaldehyde)/n(1,2-propylene)=1/1.5,w(polyaniline doped with copper chloride)=0.98%,cyclohexane 14mL and reaction time 2.0 h,yield of benzaldehyde 1,2-propylene acetalization can reach 91%.