SnO催化、无中和水洗合成DOP的研究

Synthesis of DOP by Catalyzation of Stannous Oxide

以氧化亚锡 (SnO)作催化剂 ,苯酐和辛醇 (2 乙基己醇 )酯化反应合成邻苯二甲酸二辛酯 (DOP) ,省却中和水洗和汽提工序 ,其最佳工艺条件为 :酯化温度 2 10～ 2 2 0℃ ,催化剂加入量 0 .8% ,过量醇含量 18% ,脱醇真空度为 2 0kPa (绝压 ) ,脱醇温度为 160℃ ,活性炭加入量为 1‰ ,产品质量达到优级品。

Synthesis of diisooctyl phthalate (DOP) was presented by esterification of 2-ethyl octanol with phthalic anhydride under the catalyzation of stannous oxide, with no neutralization and no water wash to get the good quality of product. The best technical condition was as follows: stannous oxide (SnO) 0.8% (accounted from phthalic anhydride), reaction temperature 210-220℃, excess alcohol 18%, temperature of separating alcohol 160℃, pressure 20 kpa and active carbon 1‰.