摘要
利用制备的特殊固体超强酸为催化剂,将对羟基苯甲酸和乙醇酯化合成对羟基苯甲酸乙酯,讨论了催化剂的制备及醇化条件的确定。实验表明:此固体超强酸具有很好的催化活性,当催化剂用量与对羟基苯甲酸的用量比为12.5g/mol,醇酸摩尔比为3:1,回流反应4h时,酯收率可达84.3%,较普通超强酸催化剂的酯收率有明显的提高。
The catalytic esterification for preparing ethyl p - hydroxybenzonate with special superacid is described. The special superacid is synthesized and the conditions of esterification are investigated. It showed that the special superacid SO42- /α- Fe2O3 is an excellent catalyst,the yield of ethyl p- hydroxybenzonate can reach 84.3 % under ratio of ethyl alcohol and p- hydroxybenzoic acid 3:1, reation time of 4 hour and amount of catalyst of 9.06 %, which exceeds general solid superacid catalyst.
出处
《广州化工》
CAS
2005年第2期21-22,共2页
GuangZhou Chemical Industry
