文献类型：期刊文献

中文题名：TiO_2-SiO_2-Al_2O_3/SiO_2催化剂的制备及其合成PTT的催化性能研究

英文题名：Preparation and catalytic performance of TiO_2-SiO_2-Al_2O_3/SiO_2 catalyst in PTT synthesis

作者：曹加悦[1];赫崇衡[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2016

卷号：38

期号：4

起止页码：1

中文期刊名：合成纤维工业

外文期刊名：China Synthetic Fiber Industry

收录：CSTPCD

基金：国家自然科学基金资助项目(21076075)

语种：中文

中文关键词：钛系催化剂;负载型催化剂;聚对苯二甲酸丙二醇酯;催化性能;硅胶

外文关键词：titanium catalyst;supported catalyst;polyethylene terephthalate;catalytic performance;silica gel

摘要：采用浸渍法,以二氧化硅(SiO_2)负载钛(Ti)系化合物制备TiO_2-SiO_2-Al2O3/SiO_2负载型催化剂,并通过正交实验优化制备工艺条件,将所得到的负载型催化剂用于合成聚对苯二甲酸丙二醇酯(PTT),同时与TiO_2/SiO_2催化剂的性能进行比较。结果表明:在制备TiO_2-SiO_2-Al2O3/SiO_2时,正硅酸乙酯和去离子水加入量对其催化性能有较大的影响,较佳制备工艺条件为钛酸四丁酯0.65 g,硅酸乙酯80μL,异丙醇铝0.13 g,去离子水240μL;将TiO_2-SiO_2-Al2O3/SiO_2催化剂应用于合成PTT,在其加入量(相对于精对苯二甲酸(PTA))为0.65 mg/g,1,3-丙二醇/PTA摩尔比为1.8,酯化温度240℃,缩聚反应温度255℃,缩聚时间50 min的条件下,合成的PTT特性黏数达0.871 d L/g;与TiO_2/SiO_2催化剂相比较,TiO_2-SiO_2-Al2O3/SiO_2催化剂合成PTT具有更高的催化性能。
A TiO2-SiO2-Al2 O3/SiO2 supported catalyst was synthesized by using silica （ SiO2 ） supported titanium compounds via impregnation process .The synthesis conditions were optimized by orthogonal experiment .The obtained supported catalyst was used in the synthesis of poly （ trimethylene terephthalate ） （ PTT） and was compared with TiO 2/SiO2 catalyst in catalytic perform-ance .The results showed that the addition amounts of tetraethyl orthosilicate and deionized water gave agreat effect on the catalyt -ic performance of TiO2/SiO2 -Al2O3/SiO2;the synthesis conditions were optimized as 0.65 g tetrabutyl titanate, 80μL tetraeth-yl orthosilicate, 0.13 g aluminum isopropoxide , deionized water 240 μL; the PTT with the intrinsic viscosity of 0.871 dL/g could be synthesized when 0.65 mg/g TiO2-SiO2-Al2 O3/SiO2 based on purified terephthalic acid （ PTA） was applied in the syn-thesis of PTT under the conditions of 1,3-aluminum isopropoxide/PTA mole ratio 1.8, esterification temperature 240 ℃, poly-condensation temperature 255 ℃ and time 50 min; TiO2-SiO2-Al2 O3/SiO2 supported catalyst provided better catalytic perform-ance in the synthesis of PTT than TiO 2/SiO2 catalyst.