摘要
利用超声波联合稀碱液对原料花生壳进行预处理,制备了复合不同钕摩尔含量的稀土固体超强酸S2O82-/ZrO2-Nd2O3,研究了其在花生壳水解制备乙酰丙酸反应中的催化作用。实验发现钕含量为5%的固体酸催化性能最佳。在单因素实验基础上,选取水解温度、水解时间、固体酸用量为考察因素,采用响应面分析法确定了最优水解工艺条件为水解温度230℃、水解时间35min、固体酸用量6.3%,在此条件下乙酰丙酸产率为32.17%。
Peanut shells were pretreated by ultrasonic and dilute alkali jointly. Rare earth modified solid su- peracids S2O2-8ZrO2-Nd2 O3 composed of different molar content of neodymium were prepared and their cat- alytic performance in the reaction of peanut shells to levulinic acid（LA）, were studied. The experimenl re- sults showed that the catalytic property of solid acid was the best with 5% neodymium. On the basis of single factor experiment, response surface analysis was applied to determine the optimum technological conditions. The optimal conditions were as follows： hydrolysis temperature 230℃, hydrolysis time 35 rain, and the amount of solid acid 6.3%. Under these conditions, the LA yield could reach 32.17%.
出处
《化学世界》
CAS
CSCD
北大核心
2013年第12期722-726,共5页
Chemical World
基金
河北省自然科学基金项目(B2012105002)
关键词
乙酰丙酸
钕
固体超强酸
花生壳
催化
levulinic acid
neodymium
solid superacid
peanut shells
catalysis
