학술논문
固体酸SO42-/SiO2-TiO2催化合成乙酰水杨酸研究 / Synthesis of acetylsalicylic acid catalyzed by solid acid SO42-/SiO2-TiO2
Document Type
Academic Journal
Author
Source
化学研究与应用 / Chemical Research and Application. 31(2):303-307
Subject
Language
Chinese
ISSN
1004-1656
Abstract
以水杨酸和乙酸酐为原料, 用SO2-4/SiO(2-)TiO2固体酸为催化合成乙酰水杨酸, 考察了TiO2与SiO2质量比、硫酸浸渍量、浸渍时间、煅烧温度等因素对乙酰水杨酸产率影响, 通过红外光谱、扫描电镜和激光粒度仪对催化剂或合成产物进行了表征.得到最佳反应条件:SiO2:TiO2质量比为0.4:1、硫酸浸渍量与TiO2质量比为0.49:1、浸渍时间为26 h、煅烧温度为400℃, 该条件下制备的固体酸催化合成乙酰水杨酸产率为65％.该催化剂具有易与反应体系分离, 对设备腐蚀性小, 可再生等优点.
Used salicylic acid and acetic anhydride as raw materials, synthesis of Acetylsalicylic acid with SO42-/SiO(2-)TiO2 solid acid as catalyst, The mass ratio of TiO2 to SiO2, sulfuric acid impregnation, dipping time, effect of calcination temperature and other factors on the catalytic performance of SO42-/SiO(2-)TiO2 were investigated.By means of infrared spectrometer, field emission scanning electron microscope and laser particle sizer were used to analyze and characterize it.The best reaction conditions were obtained:the SiO2:TiO2 mass ratio was 0.4:1, Sulfuric acid impregnation amount was 0.49:1, The soaking time was 26 h and the roasting temperature was 400℃, and the yield of acetylsalicylic acid was 65％under this condition.The catalyst is easy to be separated from the reaction system, and has the advantages of small corrosion, renewable.
Used salicylic acid and acetic anhydride as raw materials, synthesis of Acetylsalicylic acid with SO42-/SiO(2-)TiO2 solid acid as catalyst, The mass ratio of TiO2 to SiO2, sulfuric acid impregnation, dipping time, effect of calcination temperature and other factors on the catalytic performance of SO42-/SiO(2-)TiO2 were investigated.By means of infrared spectrometer, field emission scanning electron microscope and laser particle sizer were used to analyze and characterize it.The best reaction conditions were obtained:the SiO2:TiO2 mass ratio was 0.4:1, Sulfuric acid impregnation amount was 0.49:1, The soaking time was 26 h and the roasting temperature was 400℃, and the yield of acetylsalicylic acid was 65％under this condition.The catalyst is easy to be separated from the reaction system, and has the advantages of small corrosion, renewable.