摘要
为了提高乙基麦芽酚的产率和减少废水中氯化钠的含量,采用密闭水解法对以糠醛和氯气为原料合成乙基麦芽酚过程中的常压水解步骤进行改进。通过正交实验对密闭水解法的工艺条件进行了优化,并确定了适宜的工艺条件为:反应温度125℃,反应压力2.1 MPa,溶剂中甲醇的体积分数65%,反应时间3.5 h。与常压水解法比较,乙基麦芽酚的产率可以提高3.9%,氢氧化钠消耗量降低78%,废水中氯化钠的含量降低77.4%,副产品氯甲烷可以回收利用。
With a view to increasing the yield of ethyl mahol and decreasing the content of sodium chloride in discharge water, the sealed hydrolization method was adopted to improve the atmospheric pressure hydrolization process in the course of synthesizing ethyl maltol from the raw materials of furol and chlorine gas. The process conditions of sealed hydrolization method were optimized by an orthogonal experiment, and the optimum process conditions were as follows ：the reaction temperature was 125 ℃, the reaction pressure was 2. 1 MPa, the volume fraction of methanol in solvent was 65%, and the reaction time was 3.5 h. Compared with the atmospheric pressure hydrolization process, the sealed hydrolization method increased the yield of ethyl maltol by 3.9%, decreased the consumption of sodium hydroxide by 78%, and reduced the content of sodium chloride in discharge water by 77.4%. Furthermore, the resulting byproduct chloromethane could be recovered and utilized in the sealed hydrolization process under the optimum process conditions.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2012年第6期588-591,共4页
Fine Chemicals
基金
安徽省应用化学重点学科
化学工程与工艺教学团队资助项目(200802187C
20101035)
滁州学院特色专业资助项目~~
关键词
密闭水解法
乙基麦芽酚
工艺改进
食品与饲料用化学品
sealed hydrolization method
ethyl maltol
process improvement
food and feedstuff chemicals
