摘要
本文考察了以HY型分子筛作为催化剂,以青叶噁烷和异丁酸为原料催化合成2-2-4-三甲-1-3-戊二醇基双异丁酸酯(TXIB),并进一步地考察了投料比、反应时间、反应温度、催化剂用量、搅拌速度、催化剂粒度、催化剂焙烧温度及HY型分子筛循环使用情况对合成2-2-4-三甲-1-3-戊二醇基双异丁酸酯(TXIB)反应的影响;实验结果表明青叶噁烷(5,5-二甲基-2,4-二异丙基-1,3-二氧恶烷)与异丁酸的最佳投料比为1︰3.2;最佳反应时间为5 h;最佳反应温度为150℃;最佳催化剂用量为0.25 g,占青叶噁烷质量的1.25%;最佳搅拌速度为350 r/min;催化剂粒度为800 nm,催化剂焙烧温度为450℃时,转化率与选择性较大;在此条件下,青叶噁烷的转化率为83.9%,TXIB的选择性为98.1%,且HY型分子筛作为催化剂可循环利用。
In this paper,we investigated the catalytic synthesis of 2-2-4-trimethyl-1-3-pentanediyl bis(isobutyrate)(TXIB)using HY-type molecular sieve as a catalyst with green oxane(2,4-diisopropyl-5,5-dimethylmetadioxan)and isobutyric acid as raw materials,and further investigated the effects of feeding ratio,reaction time,reaction temperature,catalyst dosage,stirring rate,catalyst particle size,catalyst roasting temperature and recycling of HY-type molecular sieve on the synthesis of 2-2-4-trimethyl-1-3-pentanediol diisobutyrate(TXIB).The experimental results showed that the optimal feeding ratio of green oxane(5,5-dimethyl-2,4-diisopropyl-1,3-dioxane)to isobutyric acid was 1︰3.2;the optimal reaction time was 5 h;the optimal reaction temperature was 150℃;the optimal catalyst dosage was 0.25 g,accounting for 1.25%of the mass of green oxane;the optimal stirring speed was 350 r/min;the catalyst particle size was 800 nm;and the catalyst roasting temperature was 450℃,the conversion and selectivity were larger.Under these conditions,the conversion of cyanoxane was 83.9%and the selectivity of TXIB was 98.1%,and the HY-type molecular sieve was recoverable as a catalyst.
作者
周德星
张晨
Zhou Dexing;Zhang Chen(Qingdao City Development and Reform Comprehensive Administrative Law Enforcement Detachment,Qingdao 266071;Qingdao University Institute of Belt&Road,Business School,Qingdao 266071,China)
出处
《广东化工》
CAS
2022年第10期20-25,共6页
Guangdong Chemical Industry
