锌铝混合氧化物催化降解废弃PET聚酯的研究  

Investigation of Mixed Oxides Obtained from Zn/Al Hydrotalcite for Glycolysis of Polyethylene Terephthalate

作　　者：陈飞飞[1] 任晓莉[1] 刘青松[1] 秦刚[1] 杨锋[1] 

机构地区：[1]武汉纺织大学化学与化工学院,湖北武汉430073

出　　处：《武汉纺织大学学报》2013年第6期6-9,共4页Journal of Wuhan Textile University

基　　金：中国纺织工业协会项目(20100009)

摘　　要：通过共沉淀法合成了锌铝水滑石,并煅烧得到其对应的锌铝混合氧化物。利用X射线粉末衍射对其结构进行表征,实验结果证明合成产物具有典型的水滑石层状特征,且晶体结构完善。将两者分别用于醇解废弃PET催化剂,比较可知锌铝混合氧化物的催化活性明显优于其对应前驱体,同时该反应条件下醇解反应满足一级反应条件。对醇解产物进行FT-IR,DSC表征,证明醇解产物为BHET,且纯度较高。Zn/Al hydrotalcite was prepared by coprecipitation processes, and the sample was calcined to obtain corresponding mixed oxide. Zn/Al hydrotalcite and mixed oxide were characterized by powder X-ray diffraction. It was confirmed that the materials had hydrotalcite structure. Compared with the corresponding precursor, Zn/Al mixed oxide exhibited better catalytic activity for glycolysis reaction. The kinetics of glycolysis of PET in the presence of Zn/Al mixed oxide as catalyst is interpreted by first-order reaction kinetics model. The glycolysis product was identified by FT-IR and DSC. The experimental results showed that the BHET monomer was predominately glycolysis product and had high purity.

关 键 词：锌铝水滑石 混合金属氧化物 醇解 废弃PET 

分 类 号：X791[环境科学与工程—环境工程]