一水合硫酸氢钠催化合成丙酸苄酯的研究

Study on Catalytic Synthesis of Benzyl Propionate Using Sodium Sulfate Monohydrate

用一水合硫酸氢钠催化苯甲醇与丙酸的酯化反应合成了丙酸苄酯。研究结果表明:一水合硫酸氢钠具有较高的催化活性。考察了催化剂用量、苯甲醇与丙酸摩尔比、反应时间、反应温度和带水剂环己烷用量对丙酸苄酯收率的影响。在典型反应条件下(苯甲醇与丙酸摩尔比=0 1∶0 2,1 0g催化剂/0 2mol丙酸,反应时间2 5h,反应温度95～110℃,15mL环己烷/0 2mol丙酸),丙酸苄酯的收率可以达到82 3%。该催化剂易于回收且可重复使用,具有良好的活性及稳定性,是合成丙酸苄酯的理想催化剂。

Benzyl propionate was catalytic synthesis by the esterification reaction of benzyl alcohol with propionic acid using sodium sulfate monohydrate The results indicated that NaHSO4·H2O had higher catalytic activity for the reaction The influences of the amount of catalyst used, the molar ratio of benzyl alcohol to propionic acid, reaction time and temperature, and the amount of cyclohexane used on the yield of benzyl propionate have been investigated Under the typical reaction conditions (catalyst/propionic acid is 10 g∶02 mol, benzyl alcohol/propionic acid molar ratio is 01∶02, reaction time is 25 h, reaction temperature is 95~110℃, cyclohexane/ propionic acid is 15 mL∶02 mol), the yield of the ester could reach 823% The catalyst can be easily recovered and reused and has very good activity and stability Sodium sulfate monohydrate as catalyst was better based on the esterification reaction of benzyl propionate with different catalysts