Verfahren zur Herstellung von C?-C?-Olefinen

Procedure for the preparation of C5-C8-olefins by catalytic codimerization of a mixture of ethene and butene and, if desired, propene, characterized in that for the catalytic reaction in a reaction zone a concentration of butene equal to or greater than the concentration of butene at which the conversion of butene to higher olefins takes place at the same rate as the formation of butenes by dimerization of ethene in the reaction zone ([C4] crit, as defined above); with the formation of an olefin mixture from which the normal butenes are separated and recirculated to the reaction zone, while the C5 and C8 olefins are recovered as the reaction product. (Machine-translation by Google Translate, not legally binding)