摘要
采用沉淀-浸渍法制备了不同金属配比的S2O82-/TiO2-Al2O3固体超强酸催化剂,并研究了其在催化水解花生壳制备乙酰丙酸反应中的作用。实验发现n(Al)∶n(Ti)=1∶2时催化效果最佳,并进一步考察了其水解温度,水解时间,固体酸用量和液固比对乙酰丙酸得率的影响。采用响应面法对水解工艺进行了优化,并建立二次回归模型。结果表明,当水解温度为235℃、水解时间为30min、固体酸用量为4.6%和液固比18∶1(mL/g)时为较优的制备工艺,在该工艺条件下,乙酰丙酸得率为26.43%。
S2Os2-/TiO2-A1203solid superacid of different metal proportions by impregnation and deposition method was prepared and used for the reaction of catalytic hydrolysis of peanut shells to produce levulinic acid （LA）. The results showed that the catalyst property was best with the ratio of n（AI） ：n （Ti）= 1：2, and further the effects on hydrolysis temperature, hydrolysis time, the amount of solid acid and liquid-solid ratios on the LA yield had been discussed in this thesis. Quadratic regression model was founded and optimization was analyzed with response surface method （ RSM ）. The experimental results showed that the optimal conditions as follow ： hydrolysis temperature was 235℃, hydrolysis time was 30min, the amount of solid acid was 4. 6% , and liquid-solid ratio was 18 ： 1 （mL/g）. Under this condition,the LA yield could reach to 26. 43%.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2013年第4期536-540,共5页
Chemical Research and Application
基金
唐山师范学院科学研究基金项目(07C20)资助
关键词
乙酰丙酸
固体超强酸
花生壳
响应面法
levulinic acid
solid superacids
peanut shells
response surface method
