CO插入反应,例如烯烃氢甲酰化反应,可以作为研究均相催化和多相催化之间关联的模型反应.均相催化氢甲酰化反应存在的主要问题是反应结束后催化剂难于同产物分离,而且所采用的有机溶剂大多对环境有污染.这些问题严重地阻碍了均相催化在工业生产中的广泛应用.到目前为止,人们的研究兴趣普遍集中在开发有效的均相固载化催化剂.由于多相催化剂的催化活性和选择性比均相催化剂低得多,
iliceous mesostructured cellular foams (MCFs) are a new class of three-dimensional hydrothermally robust materials with ultralarge mesopores. The open system ol large pores ana me 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=2000h^-1.