琥珀酸酐均相催化加氢生成γ-丁内酯的反应动力学研究

Kinetic Study on the Homogeneous Hydrogenation of Succinic Anhydride to γ-Butyrolactone by RuCl_3/PPh_3

以RuCl3 /PPh3 为催化剂体系研究了琥珀酸酐均相催化加氢反应动力学 .结果表明当催化剂浓度小于1.0× 10 -2 mol /L ,n(PPh3 ) /n(Ru) =7,SA浓度小于 2 .2 5mol /L和反应氢压PH2 小于 2 .2 5MPa时 ,反应速率方程为R =k1[Ru][SA]PH2 ;当反应氢压PH2 大于 2 .77MPa时 ,反应速率方程为R =k2 [Ru][SA].琥珀酸酐加氢生成γ -丁内酯的活化能Ea为 85 .2kJ/mol,活化焓△H≠ 为 81.8kJ

This paper is a kinetic study on the homogeneous hydrogenation of succinic anhydride to form γ-butyrolactone. When the catalyst concentration is less than 1.0×10 -2 mol/L, n (PPh 3)/ n (Ru)=7, succinic anhydride concentration is less than 2.25 mol/L and P H 2 is lower than 2.25 MPa, the kinetic equation is R = k 1 P H 2 . When P H 2 is higher 2.77 MPa, the equation is R = k 2. The activation energy Ea is 85.2 kJ / mol and the activation entropy △H ≠ is 81.8 kJ / mol about the homogeneous hydrogenation of succinic anhydride to γ-butyrolactone.