改性β沸石合成丙酸异戊酯  

Synthesis of Isopentyl Propionate by using βZeolites as Catalyst

作　　者：陈平[1] 

机构地区：[1]辽宁石油化工大学石化学院,辽宁抚顺113001

出　　处：《香料香精化妆品》2005年第1期19-21,共3页Flavour Fragrance Cosmetics

摘　　要：　　将β沸石经水蒸气处理、酸处理,及负载FeCl3改性,选择水蒸气处理后的β沸石为催化剂,以丙酸与异戊醇反应合成丙酸异戊酯。讨论了醇酸比、催化剂用量、反应时间对酯化率的影响,得出最佳反应条件为: 丙酸为 0.1mol, 醇酸比为 1.5:1,催化剂用量为 1.5g,反应时间为 4小时, 最终转化率为 95.12%;将不同处理条件及不同硅铝比的沸石进行酯化比较,结果表明,β沸石的硅铝比越高,酯化率越高;酸量越高,酯化率越高。β沸石作为催化剂,产品质量好、选择性好、对设备无腐蚀、可重复使用。β zeolites have been modified by hydrothermal treatment, acid treatment and loading FeCl 3. β zeolite after hydrothermal treatment was applied as catalyst to the esterification of propionic acid and iso-pentyl alcohol. Various reaction parameters such as ratio of alcohol to acid, catalyst amount and reaction time were studied. The optimum reaction conditions were: propionic acid was 0.1mol, molar ratio of iso-pentyl alcohol to propionic acid 1.5:1, amount of catalyst was 1.5g, reaction time was 4h. The yield of iso-pentyl propionate reaches 95.12% under the optimum conditions. The esterification results under various conditions of treatment for β zeolites have been discussed. It has been showed that the silica aluminium ratio and acidity of catalysts were higher, the yield of esters was higher. β zeolite that was applied as catalyst are of higher activity, good selectivity and no pollution.

关 键 词：Β沸石 丙酸异戊酯 酯化率 改性 催化剂用量 反应时间 醇酸比 酸量 水蒸气处理 最佳反应条件 

分 类 号：TQ655[化学工程—精细化工]