复合氧化物SnO_2-ZnO催化废聚酯合成DOTP的研究

Study on the Synthesis of DOTP Catalysized by SnO_2-ZnO Composit Oxide

采用共沉淀法合成了SnO2-ZnO复合氧化物催化剂,以废聚醑(PET)和异辛醇(2-EH)为原料合成增塑剂对苯二甲酸二辛醑(DOTP)．实验结果表明,合成DOTP的最佳工艺条件为:反应温度为210-220℃,PET: 2-EH为1:3．8(摩尔比),催化剂用量为PET质量的13．10％,反应时间为3 h,产品收率可达96．18％．

SnO2-ZnO composit oxide was prepared by coprecipitation method. Di - octyl terephthalate （DOTP） was synthesized by using waste PET and 2- EH as materials. The optimal conditions for synthesizing DOTP were as follows： the reaction temperature is between 210 - 220 ℃, the molor ratio of waste PET to 2- EH is 1：3.8 and the quality ratio of catalyst to waste PET is 13.10%, the reaction time is 3 hours, the productivity of DOTP is up to 96.18%.