摘要
采用连续法合成１，４二氧六环。以二甘醇为原料，温度２４０℃，催化剂初始浓度：硅钼酸３％，或硫酸铁３％，或硅钨酸银２％；连续补加浓度：硅钼酸１％，硫酸铁１％，硅钨酸银０５％；以乙二醇为原料，温度１９０℃，催化剂初始浓度：硅钼酸４％，或硫酸铁３５％，或硅钨酸银２％；补加浓度：硅钼酸１５％，硫酸铁１５％，硅钨酸银１％；控制塔顶温度为９５～１０５℃，反应速度快，产率较高。
The continuous catalysizing synthesis of 1,4 dioxane has been studied. The experiment results show that the reacting speed is quicker and the yield of 1,4 dioxane is higher under the following conditions. When diethylene glycol is used as raw material, the reacting condition is that the temperature is 240℃, the initial concentration of catalyst is 3% 12 molybdosilicic acid (3% ferric sulfate or 2% silver 12 tungstosilicate), the coutinuous added concentration of catalyst is 1% 12 molybdosilicic acid (1% ferric sulfate or 0.5% silver 12 tungstosilicate). When glycol is used as raw material, the reacting condition is that the temperature is 190℃, the initial concentration of catalyst is 4% 12 molybdosilicic acid (3.5% ferric sulfate or 2% silver 12 tungstosilicate), the continuous added concentration of catalyst is 1.5% 12 molybdosilicic acid (1.5% ferric sulfate or 1% silver 12 tungstosilicate). The temperature of the top of the controlling tower is 95～105℃.
出处
《精细化工》
CAS
CSCD
1996年第5期52-54,共3页
Fine Chemicals
关键词
二甘醇
乙二醇
催化
合成
二氧六环
Diethylene glycol, Glycol, Continuous, Catalysizing synthesis
