钯-三苯膦催化体系选择氢化顺酐制备琥珀酸酐  

Selective Hydrogenation of Maleic Anhydride to Succinic Anhydride on PdCl 2/PPh 3

作　　者：刘蒲[1] 刘晔[1] 殷元骐[1] 

机构地区：[1]中国科学院兰州化学物理研究所

出　　处：《应用化学》1999年第1期58-61,共4页Chinese Journal of Applied Chemistry

摘　　要：开发了一种由顺酐直接加氢高选择性及高转化率制备琥珀酸酐的新方法，研究结果表明：钯三苯基膦催化体系对顺酐加氢具有较高的反应活性．在所考察的反应条件下，此催化剂体系对琥珀酸酐的选择性为１００％，无其他副产物生成．并考察了三苯基膦／钯摩尔比，反应温度，氢气压力，催化剂和顺酐浓度对顺酐催化加氢生成琥珀酸酐的影响．在反应条件为ＰｄＣｌ２＝１２５×１０－３ｍｏｌ／Ｌ，ｎ（顺酐）／ｎ（Ｐｄ）≤２０００，ｎ（三苯基膦）／ｎ（Ｐｄ）＝４，Ｔ＝３７３～３９３Ｋ，２５ＭＰａ的氢压下于乙二醇二甲醚溶剂中反应１ｈ以上，可使顺酐的转化率大于９０％．A noval preparation method of succinic anhydride with high selectivity and conversion by homogeneous hydrogenation of maleic anhydirde has been successfully developed. Results show that among catalysts and ligands studied PdCl 2 is the best catalyst and PPh 3 is the most suitable ligand. The effects of n (PPh 3)/ n (Pd), reaction temperature, hydorgen pressure, catalyst concentration and maleic concentration have been investigated. Under the typical reaction conditions: PdCl 2=1 25×10 -3 mol/L, n (MA)/ n (Pd)=2000, n (PPh 3)/ n (Pd)=4 in 8 mL ethylene glycol dimethyl ether at 373～393 K and hydrogen pressure of 2 5 MPa for 1 hour more, the conversion of meleic anhydride is 90% and the selectivity of succinic anhydride is 100%.

关 键 词：顺酐 均相加氢 钯催化剂 三苯基膦 琥珀酸酐 

分 类 号：TQ225.23[化学工程—有机化工] O643.36[理学—物理化学]