高校化学工程学报2024，Vol.38Issue(6)：890-896,7.DOI:10.3969/j.issn.1003-9015.2024.06.006
HBr-LiBr催化葡萄糖二酸单钾盐合成2,5-呋喃二甲酸工艺优化
Process optimization of 2,5-furandicarboxylic acid synthesis from potassium bisaccharate catalyzed with HBr-LiBr
摘要
Abstract
2,5-furandicarboxylic acid(2,5-FDCA)is a bio-based polyester monomer with great potential,and it is promising to produce 2,5-FDCA from saccharic acids.In order to find a more suitable catalytic system for industrialization,this work optimized the process of 2,5-FDCA synthesis from cyclodehydration of potassium bisaccharate catalyzed with HBr-LiBr.The solvent screening results show that solvents containing O=S=O can facilitate the reaction.A possible cyclization mechanism of solvent effects on potassium bisaccharate and sulfolane was proposed.The optimal catalyst ratio for 2,5-FDCA preparation by cyclodehydration of potassium bisaccharate was obtained as w(HBr)=2%,w(LiBr)=5%,and the yield of 2,5-FDCA was 81.1%.The kinetic data for the preparation of 2,5-FDCA from cyclodehydration of potassium bisaccharate with different substrate concentrations were determined,and the reaction rate constant decreased gradually with the increase of substrate concentration.Water content was a sensitive parameter in the HBr-LiBr catalytic system,and when the water content increased from 2.2%to 8.2%,the yield of 2,5-FDCA decreased from 75.2%to 20.6%.This work provide important basic data for the production of 2,5-FDCA from saccharic acids.关键词
葡萄糖二酸单钾盐/2,5-呋喃二甲酸/HBr-LiBr催化/工艺优化Key words
potassium bisaccharate/2,5-furandicarboxylic acid/HBr-LiBr catalyzed/process optimization分类
化学化工引用本文复制引用
吕喜蕾,魏茜文,任傲天,蒋雨希,秦雯琪,吕秀阳..HBr-LiBr催化葡萄糖二酸单钾盐合成2,5-呋喃二甲酸工艺优化[J].高校化学工程学报,2024,38(6):890-896,7.基金项目
国家重点研发计划(2022YFC2104500) （2022YFC2104500）
国家自然科学基金(22078290,22278358). （22078290,22278358）
