功能化氯球共价固载硅钨酸催化制备月桂酸单甘酯工艺研究
Preparation of Glycerol Monolaurate Catalyzed by Functionalized Chlorine Spheres Covalently Supported Silicotungstic Acid
郏俊浩 1曾智炜 1任佳益 1王婕 1蒋佳睿 1赵孙超 1唐秀娟 1韩晓祥1
作者信息
- 1. 浙江工商大学食品与生物工程学院,杭州 310018
- 折叠
摘要
以氯球为载体,经哌嗪功能化后通过共价固载方式与硅钨酸作用制备哌嗪改性氯球固载硅钨酸催化剂,借助FT-IR、XPS、XRD和31P-MAS NMR等技术手段对催化剂结构及酸性能进行表征,同时探究该催化剂在月桂酸(LA)与甘油(GL)选择性酯化制备月桂酸单甘脂(GML)反应中的催化性能.研究表明,固载型催化剂[CPPI]2H2SiW12O40具有较好的LA转化率和最好的GML产率.催化剂适宜的Brønsted酸性及"假液相"特性是该催化剂具有高活性的原因.在GL/LA物质的量比5∶1,催化剂质量分数5％,反应时间2 h,反应温度423 K条件下GML平均产率为79.5％.
Abstract
Piperazine modified chlorine spheres supported silicotungstic acid catalysts were successfully synthe-sized by covalent immobilization of piperazine modified chlorine spheres with silicotungstic acid.The structure and a-cidic properties of the catalysts were characterized using FT-IR,XPS,XRD and 31P-MAS NMR techniques.The catalytic performance of the catalyst was investigated by selective esterification of lauric acid(LA)and glycerol(GL)to glycerol monolaurate(GML).Among them,[CPPI]2H2SiW12O40 catalyst revealed a better LA conversion rate and the best GML yield.The suitable Brønsted acid strength and"pseudo liquid phase"characteristics of the catalyst were the reasons for its high catalytic activity.Under the conditions of molar ratio of GL/LA=5∶1,catalyst amount of 5％,reaction time of 2 h,and reaction temperature of 423 K,the yield of GML was 79.5％.
关键词
共价固载/硅钨酸/月桂酸单甘酯Key words
covalent immobilization/silicotungstic acid/glycerol monolaurate引用本文复制引用
出版年
2024
NETL
NSTL
万方数据