摘要
Ｄ００１树脂用ＳｎＣｌ_４改性后，酸强度、酸量和Ｈ＋交换容量都发生了变化。证明ＳｎＣｌ４能在树脂的磺酸基团产生络合，形成新的不会被阳离子交换而失活的Ｈ０≤－１１．３５酸中心。考察了树脂催化剂液相合成乙酸丁酯反应的表观活化能、催化系数和内外扩散影响。在连续分水条件下，反应的表观活化能为３３．４ｋＪ／ｍｏｌ，催化剂的催化系数为１，３４×１０－３，乙酸丁酯产率可达９８．７％，高于等当量Ｈ２ＳＯ４的催化活性。
s ion exchange resin D001 was modified by SnCl4,its acidity,amount of acid and exchange quality of H+ were all changed.The results show that SnCI4, reacts with the sulphonate structure of the resin forming a new acid centre(H0≤-11.35), which can not be exchanged by positive ion. For the esterification of n-butyl acetate catalyzed by the resin,the apparent activation energy(Ea),catalytic coefficient (ka) and effect of internal and external diffusion were investigated. Under the condition of continuous separation of water,Ea= 33.4kJ/mol, ka=1.34× 10-3 and the yield is 98. 7%.Its activity is better than of equivalent H2SO4.
出处
《石油化工》
CAS
CSCD
北大核心
1996年第2期80-84,共5页
Petrochemical Technology
基金
上海市教委科研基金
关键词
离子交换树脂
催化剂
酯化反应
乙酸丁酯
改性
ion exchange resin,SnCl_4,solid acid catalyst,esterification,SnCl_4, n-butyl acetate
