VERFAHREN ZUR DEHYDROCYCLODIMERISIERUNG.

摘要

An improved process is disclosed for the dehydrocyclodimerization of light aliphatic hydrocarbons (1) into aromatic hydrocarbons comprising benzene, toluene and xylenes. Improved per pass conversion and an improved yield structure are obtained by increasing the relative percentage of xylene which is produced as compared to benzene. This improvement is achieved by recycling benzene and/or toluene recovered from the reaction zone effluent (7) to the reaction zone (6).