Benzaldehyde 1,2-propanediol acetal was synthesized from benzaldehyde and 1,2-propanediol in the presence of SO42-/TiO2-MoO3-La2O3.The factors influencing the synthesis were discussed and the best conditions were foun...Benzaldehyde 1,2-propanediol acetal was synthesized from benzaldehyde and 1,2-propanediol in the presence of SO42-/TiO2-MoO3-La2O3.The factors influencing the synthesis were discussed and the best conditions were found out.The optimum conditions are:molar ratio of benzaldehyde to 1,2-propanediol is 1:1.8,the quantity of catalyst is equal to 1.0% feed stock,and the reaction time is 1.0 h.SO42-/TiO2-MoO3-La2O3 is an excellent catalyst for synthesizing benzaldehyde 1,2-propanediol acetal and its yield can reach over 77.2%.展开更多
以苯甲醛和1,2-丙二醇为原料,在硫酸高铈的催化下,合成了苯甲醛1,2-丙二醇缩醛,研究了物料配比、催化剂用量、反应时间等因素对产品收率的影响。实验表明,硫酸高铈是合成苯甲醛1,2-丙二醇缩醛的良好催化剂,在n(苯甲醛)∶n(1,2-丙二醇)=1...以苯甲醛和1,2-丙二醇为原料,在硫酸高铈的催化下,合成了苯甲醛1,2-丙二醇缩醛,研究了物料配比、催化剂用量、反应时间等因素对产品收率的影响。实验表明,硫酸高铈是合成苯甲醛1,2-丙二醇缩醛的良好催化剂,在n(苯甲醛)∶n(1,2-丙二醇)=1∶1.5,催化剂用量为反应物料总质量的0.95%,带水剂环己烷10 mL,反应时间60 m in的条件下,苯甲醛1,2-丙二醇缩醛的收率可达91.10%。催化剂重复使用4次仍保持较高催化活性,产品经气相色谱定量分析,纯度>98.0%。展开更多
基金Supported by the Natural Science Foundation of Hubei Province(No2005ABA053)
文摘Benzaldehyde 1,2-propanediol acetal was synthesized from benzaldehyde and 1,2-propanediol in the presence of SO42-/TiO2-MoO3-La2O3.The factors influencing the synthesis were discussed and the best conditions were found out.The optimum conditions are:molar ratio of benzaldehyde to 1,2-propanediol is 1:1.8,the quantity of catalyst is equal to 1.0% feed stock,and the reaction time is 1.0 h.SO42-/TiO2-MoO3-La2O3 is an excellent catalyst for synthesizing benzaldehyde 1,2-propanediol acetal and its yield can reach over 77.2%.
文摘以苯甲醛和1,2-丙二醇为原料,在硫酸高铈的催化下,合成了苯甲醛1,2-丙二醇缩醛,研究了物料配比、催化剂用量、反应时间等因素对产品收率的影响。实验表明,硫酸高铈是合成苯甲醛1,2-丙二醇缩醛的良好催化剂,在n(苯甲醛)∶n(1,2-丙二醇)=1∶1.5,催化剂用量为反应物料总质量的0.95%,带水剂环己烷10 mL,反应时间60 m in的条件下,苯甲醛1,2-丙二醇缩醛的收率可达91.10%。催化剂重复使用4次仍保持较高催化活性,产品经气相色谱定量分析,纯度>98.0%。