摘要
采用离子交换法制备了铬掺杂的磷钨酸(CrPW)催化剂,使用XRD、FT-IR及SEM等表征手段对其结构及形貌进行了分析,并对其催化油酸甲酯化反应进行了测试,系统考察了反应时间、温度、催化剂用量、油酸与甲醇摩尔比对酯化反应的影响。结果表明:在催化剂用量为0.25 g、反应温度为70℃、油酸与甲醇摩尔比为1∶14的催化条件下反应3 h,酯化反应转化率为88.6%。此外,CrPW催化剂重复使用4次后仍具有较高的转化率,且该催化剂还适用于各种酯化反应。
The method of ion-exchange was applied to preparing Chromium(Ⅲ)doped phosphotungstic acid(CrPW)catalyst,and the CrPW solid acid catalyst was analyzed by means of XRD,FT-IR and SEM.Furthermore,the obtained CrPW solid acid catalyst was applied to the esterification of oleic acid and methanol,and the effect of the four variables(temperature,time,catalyst dosage,molar ratio)on esterification conversion were investigated.The esterification conversion of 88.6%was achieved under the condition of reaction temperature 70oC,reaction time 3 h,molar ratio of oleic acid to methanol 1∶14 and catalyst 0.25 g.Moreover,it still had high esterification rate after reused four times,and it also could catalyze various esterification reactions.
作者
张红霞
蔡建丽
杨丹
张秋云
ZHANG Hong-xia;CAI Jian-li;YANG Dan;ZHANG Qiu-yun(School of Chemistry and Chemical Engineering,Anshun University,Anshun 561000,Guizhou,China)
出处
《粮食与油脂》
北大核心
2019年第10期37-41,共5页
Cereals & Oils
基金
贵州省教育厅科技拔尖人才支持计划项目(黔教合KY字[2018]069号)
安顺学院产学研合作教育基地项目(Asxycxy201801)
关键词
铬
掺杂
磷钨酸
酯化反应
chromium
doped
phosphotungstic acid
esterification
作者简介
张红霞(1970—),女,副教授,研究方向为农产品生产及加工;通信作者:张秋云(1989—),男,副教授,研究方向为农业生物质资源。
