caa a22 4500 47708074X CHVBK 20180405111449.0 cr unu---uuuuu 170330e19960801xx s 000 0 eng 10.1007/BF02113865 doi (NATIONALLICENCE)springer-10.1007/BF02113865 Titania-silica aerogels with superior catalytic performance in olefin epoxidation compared to large pore Ti-molecular sieves [Elektronische Daten] [R. Hutter, T. Mallat, D. Dutoit, A. Baiker] The paper provides a short overview on the various Ti- and Si-containing epoxidation catalysts, with a focus on the development and characterisation of titania-silica mixed oxides prepared by the sol-gel-aerogel method. Titania-silica aerogels, dried by semicontinuous extraction of the solvent with supercritical CO2 at low temperature, possess high surface area, an amorphous mesoporous structure, and a rather even distribution of Ti in the silica matrix. The catalytic activities of mixed oxides, silica-supported titania and Ti-substituted molecular sieves (TS-1, Ti-Β and Ti-MCM-41) are compared in the epoxidation of 1-hexene, 1-octene, cyclohexene, cyclododecene and norbornene, based on literature data. The activities (i.e. the amount of converted olefin per unit time and catalyst weight) vary in a broad range of several orders of magnitude. It is shown that the low temperature aerogel containing 20 wt% TiO2 is superior to any other Ti- and Si-containing catalyst for the epoxidation of cyclic olefins. In the epoxidation of linear alkenes TS-1 has outstanding activity. Ti-substituted large and ultra-large pore molecular sieves require further development concerning their catalytic performance. J.C. Baltzer AG, Science Publishers, 1996 titania-silica nationallicence mixed oxide nationallicence sol-gel nationallicence aerogel nationallicence epoxidation nationallicence Hutter R. Department of Chemical Engineering and Industrial Chemistry, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092, Zurich, Switzerland aut Mallat T. Department of Chemical Engineering and Industrial Chemistry, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092, Zurich, Switzerland aut Dutoit D. Department of Chemical Engineering and Industrial Chemistry, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092, Zurich, Switzerland aut Baiker A. Department of Chemical Engineering and Industrial Chemistry, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092, Zurich, Switzerland aut Topics in Catalysis Baltzer Science Publishers, Baarn/Kluwer Academic Publishers 3/3-4(1996-08-01), 421-436 1022-5528 3:3-4<421 1996 3 11244 https://doi.org/10.1007/BF02113865 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02113865 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hutter R. Department of Chemical Engineering and Industrial Chemistry, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092, Zurich, Switzerland aut NATIONALLICENCE 700 1- Mallat T. Department of Chemical Engineering and Industrial Chemistry, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092, Zurich, Switzerland aut NATIONALLICENCE 700 1- Dutoit D. Department of Chemical Engineering and Industrial Chemistry, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092, Zurich, Switzerland aut NATIONALLICENCE 700 1- Baiker A. Department of Chemical Engineering and Industrial Chemistry, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092, Zurich, Switzerland aut NATIONALLICENCE 773 0- Topics in Catalysis Baltzer Science Publishers, Baarn/Kluwer Academic Publishers 3/3-4(1996-08-01), 421-436 1022-5528 3:3-4<421 1996 3 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer