化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2014年
1期
242-246
,共5页
沙柳%乙酰丙酸%阴离子交换树脂%正交实验%分离提纯
沙柳%乙酰丙痠%陰離子交換樹脂%正交實驗%分離提純
사류%을선병산%음리자교환수지%정교실험%분리제순
Salix psammophila%levulinic acid%anion-exchange resin%orthogonal tests%separation and purification
以沙柳为原料，硫酸为催化剂，考察了催化剂浓度、反应时间、反应温度、液固比对沙柳水解制备乙酰丙酸得率的影响，通过正交实验方法得到最佳的水解反应条件为：反应温度200℃，反应时间90 min，催化剂质量分数9%，液固比（mL∶g）15∶1，乙酰丙酸的最高得率为18.80%；各因素对水解反应影响的大小顺序为：反应时间＞催化剂浓度＞反应温度＞液固比。在静态条件下，用335弱碱性阴离子交换树脂对水解液进行分离提纯，在附吸温度为35℃、树脂投料量为15 g、盐酸洗脱剂浓度为0.5 mol/L时，乙酰丙酸的回收率为95.35%。
以沙柳為原料，硫痠為催化劑，攷察瞭催化劑濃度、反應時間、反應溫度、液固比對沙柳水解製備乙酰丙痠得率的影響，通過正交實驗方法得到最佳的水解反應條件為：反應溫度200℃，反應時間90 min，催化劑質量分數9%，液固比（mL∶g）15∶1，乙酰丙痠的最高得率為18.80%；各因素對水解反應影響的大小順序為：反應時間＞催化劑濃度＞反應溫度＞液固比。在靜態條件下，用335弱堿性陰離子交換樹脂對水解液進行分離提純，在附吸溫度為35℃、樹脂投料量為15 g、鹽痠洗脫劑濃度為0.5 mol/L時，乙酰丙痠的迴收率為95.35%。
이사류위원료，류산위최화제，고찰료최화제농도、반응시간、반응온도、액고비대사류수해제비을선병산득솔적영향，통과정교실험방법득도최가적수해반응조건위：반응온도200℃，반응시간90 min，최화제질량분수9%，액고비（mL∶g）15∶1，을선병산적최고득솔위18.80%；각인소대수해반응영향적대소순서위：반응시간＞최화제농도＞반응온도＞액고비。재정태조건하，용335약감성음리자교환수지대수해액진행분리제순，재부흡온도위35℃、수지투료량위15 g、염산세탈제농도위0.5 mol/L시，을선병산적회수솔위95.35%。
Preparation of levulinic acid from hydrolysis of Salix psammophila catalyzed by sulfuric acid as catalyst was studied in this paper. The effects of catalyst concentration,reaction time,reaction temperature,liquid-solid ratio on the yield of levulinic acid were investigated. By orthogonal tests,the optimum hydrolysis reaction conditions were as follows:reaction temperature 200℃,reaction time 90 min,catalyst concentration 9%,liquid-solid ratio(mL∶g) 15∶1,the highest yield of levulinic acid was 18.80%,the order of the factors was obtained according to the degree to which they could affect hydrolysis reaction as follows:reaction time > catalytic concentration > reaction temperature >liquid-solid ratio. 335 weak basic anion-exchange resin was used for separation and purification of hydrolysis mixed solution,under the static conditions of adsorption temperature 35 ℃,amount of resin 15 g,eluent concentration (HCl) 0.5 mol/L,recovery of levulinic acid was 95.35%.
