二甘醇在金属硫酸盐的作用下合成1，4─二氧六环的研究

SYNTHESIS OF 1,4-DIOXANE WITH DIETHYLENE GLYCOL BY THE CATALYSIS OF METALLIC SULFURIC SALTS

研究了用金属硫酸盐作催化剂，以二甘醇为原料合成１，４一二氧六环，试验结果表明：在温度２２０℃左右，硫酸铁质量百分比浓度为２％～３％，反应２．５ｈ，二甘醇转化率为９９％，１，４一二氧六环选择性的摩尔百分比为８９％，补加质量百分比１％的催化剂，连续反应三次，产率无明显降低。图４，表２，参３。

This paper aims to discuss the synthesis of l,4-dioxane with diethylene glycol by the catalysis of metallic sulfuric salts. The experimental results have shown that the conversion is 99% under the following conditions:temperature 220 ℃±,concentration of ferric sulfuric salts 2￣3 wt%, reaction time 2h.The selectivity of l,4-dioxane is 89%(mol%).When it has added the fresh catalyst to 1%(m%), after the catalyst had continously been used three times, the yield of l,4-dioxane was still high. 4figs. 2tabs. 3refs.