Premium
Epoxidation of a Series of C 2 –C 6 Olefins in the Gas Phase
Author(s) -
Berndt T.,
Bräsel S.
Publication year - 2009
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200900142
Subject(s) - olefin fiber , selectivity , propene , chemistry , oxidizing agent , ethylene , cyclohexene , butene , epoxide , organic chemistry , catalysis
Epoxidation of ethylene, propylene, 2‐methylpropene, trans ‐2‐butene, 2‐methyl‐2‐butene, and 2,3‐dimethyl‐2‐butene were carried out in a flow‐through reactor in the homogeneous gas phase at pressures of 0.25–1.0 bar in the temperature range of 250–375 °C. Residence times in the reactor varied from 8.3 to 38 ms. The oxidizing agent needed in the feed gas is ozone. The O 3 efficiency (reacted olefin/initial O 3 ) was found to be strongly dependent on the reactivity of the olefin used. For C 4 –C 6 olefins, the O 3 efficiency was better than 75 % in each case. For 2‐methyl‐2‐butene and 2,3‐dimethyl‐2‐butene, the O 3 efficiency exceeded the theoretical value of 100 % considerably. The selectivity to epoxide was about 90 % independent of the olefin used. Under conditions of nearly total olefin conversion, the high selectivity to the epoxide has been retained as unchanged. There were no indications for consecutive reactions of the epoxides.