| 摘要 |
Process for preparing isoolefins The present invention relates to a continuous process for preparing isoolefins having 4 to 6 carbon atoms by cleaving compounds of the formula I R1-0-R2 I where R1 = a tertiary alkyl radical having 4 to 6 carbon atoms and R2 = H or an alkyl radical in the gas phase over a solid catalyst in the temperature range of 200 to 4000C at a pressure of 0.1 to 1-2 MPa in a reactor which is equipped with a heating jacket and is heated with a liquid heat carrier, characterized in that the temperature drop in the catalyst zone at any point in relation to the entrance temperature is less than 500C, in that the reaction mixture in the reactor and the heat carrier in the jacket flow through the reactor in cocurrent, and in that the temperature difference of the heat carrier between the feed point to the reactor and outlet from the reactor is adjusted to less than 400C.
|
