Siliceous mesostructured cellular foams （MCFs） are a new class of three-dimensional hydrothermally robust materials with ultralarge mesopores. The open system of large pores and the controllable pore size give MCFs ...Siliceous mesostructured cellular foams （MCFs） are a new class of three-dimensional hydrothermally robust materials with ultralarge mesopores. The open system of large pores and the controllable pore size give MCFs unique advantages as catalyst supports. In this paper, MCFs were employed as supports in developing the PPh3-Rh/MCF catalyst for propylene hydroformylation in a fixed-bed reactor. The PPh3-Rh/MCF catalyst shows high activity （propylene conversion of 21.6% and butyraldehyde TOF of 160.6 h -1）, high selectivity （n-butyraldehyde/i-butyraldehyde=10.4）, and excellent stability under mild conditions of p=1.0 MPa, T=393 K, and SV= 2?000 h -1.展开更多
The kinetics of diacetyl monoxime(DAM) hydrogenation catalyzed by Pd/PPh\-3 has been studied. The reaction follows the second order kinetics with respect to DAM in the range of investigation, the zeroth order kinetics...The kinetics of diacetyl monoxime(DAM) hydrogenation catalyzed by Pd/PPh\-3 has been studied. The reaction follows the second order kinetics with respect to DAM in the range of investigation, the zeroth order kinetics with respect to H\-2 pressure in optimum reaction conditions, and the first order kinetics with respect to catalyst concentration. The kinetic equation of hydrogenation reaction rate obtained is \{ r =\} k [DAM]\+2[Cat.]. The activation energy for this reaction is E a=50.41 kJ·mol\+\{-1\}. The drawn up mechanism of reaction is in agreement with experimental results.展开更多
Eight metal cluster compounds have been synthesized from parent compound （μ3-CPh）Co3-（CO）9 and triphenylphosphine（arsine,stibine,bismuthine）. All the compounds were characterized by elemental analysis and IR sp...Eight metal cluster compounds have been synthesized from parent compound （μ3-CPh）Co3-（CO）9 and triphenylphosphine（arsine,stibine,bismuthine）. All the compounds were characterized by elemental analysis and IR spectrometry. They results showed that their catalytic activities for 1-butene hydroformylation and the yields of product both were higher than that of the parent compound in 97% and 20% more, respectively, at reaction conditions of 303.5 K, 0.392 MPa, and for 48 hours. The catalytic activities and the ratio of nor to iso by using PhCCo3（CO）7（APh3）m were increased with increase in the atomic numbers of element A（A=P,As,Sb,Bi）.展开更多
文摘Siliceous mesostructured cellular foams （MCFs） are a new class of three-dimensional hydrothermally robust materials with ultralarge mesopores. The open system of large pores and the controllable pore size give MCFs unique advantages as catalyst supports. In this paper, MCFs were employed as supports in developing the PPh3-Rh/MCF catalyst for propylene hydroformylation in a fixed-bed reactor. The PPh3-Rh/MCF catalyst shows high activity （propylene conversion of 21.6% and butyraldehyde TOF of 160.6 h -1）, high selectivity （n-butyraldehyde/i-butyraldehyde=10.4）, and excellent stability under mild conditions of p=1.0 MPa, T=393 K, and SV= 2?000 h -1.
文摘The kinetics of diacetyl monoxime(DAM) hydrogenation catalyzed by Pd/PPh\-3 has been studied. The reaction follows the second order kinetics with respect to DAM in the range of investigation, the zeroth order kinetics with respect to H\-2 pressure in optimum reaction conditions, and the first order kinetics with respect to catalyst concentration. The kinetic equation of hydrogenation reaction rate obtained is \{ r =\} k [DAM]\+2[Cat.]. The activation energy for this reaction is E a=50.41 kJ·mol\+\{-1\}. The drawn up mechanism of reaction is in agreement with experimental results.
文摘Eight metal cluster compounds have been synthesized from parent compound （μ3-CPh）Co3-（CO）9 and triphenylphosphine（arsine,stibine,bismuthine）. All the compounds were characterized by elemental analysis and IR spectrometry. They results showed that their catalytic activities for 1-butene hydroformylation and the yields of product both were higher than that of the parent compound in 97% and 20% more, respectively, at reaction conditions of 303.5 K, 0.392 MPa, and for 48 hours. The catalytic activities and the ratio of nor to iso by using PhCCo3（CO）7（APh3）m were increased with increase in the atomic numbers of element A（A=P,As,Sb,Bi）.
