摘要
用磷钨酸 /活性炭为催化剂 ,催化合成二甘醇双丙烯酸酯 ,其性能优于硫酸和其他质子酸。结果表明 ,在酸醇物质的量比为 2 .1∶ 1、催化剂用量为丙烯酸质量的 1 .3%、反应温度为 1 1 5～1 2 0℃、反应时间 75 min及以甲苯为共沸剂的条件下 ,酯化率达 94.2 % ,产品质量分数大于 98% 。
It was found that using tungstophoric acid / activated carbon (PW/C) as catalyst was superior to sulphuric acid and other protonic acids in the esterification of acrylic acid with diethylene glycol. At the molar ratio of 2.1∶1 of tungstophosphoric acid to pentaerythritol; mass ratio of 1.3% of PW/C to acrylic acid, reaction temperature of 115～120℃, reaction time of 75 min, and azeotropic agent of toluene, the esterification conversion percentage was 94.2%, and the purity of the product was over 98%. The proposed catalyst could be used repeatedly.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第4期371-373,共3页
Journal of Northwest University（Natural Science Edition）
基金
陕西省自然科学基金资助项目(2 0 0 1H19)
陕西省教育厅专项科研基金资助项目 (0 1JK0 70
