| 摘要 |
PROCESS FOR THE PREPARATION OF AN AROMATIC HYDROCARBON MIXTURE The present invention relates to a process for the preparation of an aromatic hydrocarbon mixture, wherein one or more mono-olefins with two to four carbon atoms per molecule or aliphatic hydrocarbon mixtures, at least 20 wt.% of which consists of the said olefins, are contacted in a first stage at a temperature of between 325 and 550 .degree.C with a catalyst containing a crystalline metal silicate wherein the reaction product of the first stage is separated into a C4- fraction and a C5+ fraction, wherein the C4- fraction is contacted in a second stage at a temperature of 450-700 .degree.C that is at least 50.degree.C higher than the temperature employed in the first stage with a catalyst containing a crystalline gallium silicate. The relation between the C5+ content and the aromatics content in the hydrocarbon mixture obtained is improved. |
