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 chlori...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%.展开更多
文摘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%.
文摘以柠檬醛和乙二醇为原料,用氨基磺酸作催化剂,合成柠檬醛缩乙二缩醛。考察醛与醇的摩尔比、催化剂的用量、反应时间、带水剂的用量等因素对反应的影响,得到合成柠檬醛乙二缩醛的最佳合成条件。在柠檬醛用量为0.1 mol,且n柠檬醛∶n乙二醇=1∶1.2,催化剂的用量占反应物料总质量的1.0%,反应时间为120 m in,带水剂的用量为10 mL的条件下,缩醛的收率达89.24%。