公开(公告)号：GB862709A

公开(公告)日：1961-03-15

申请号：GB3495657

申请日：1957-11-08

Applicant: HOECHST AG

Inventor： SCHMETTERLING ARIE ,  DIMMLING WERNER

IPC: C07C5/41 ,  C07C15/00

Abstract: Aromatic hydrocarbons are formed by heating in the presence of an aromatisation catalyst one or more aliphatic hydrocarbons containing 9-16 carbon atoms formed by polymerisation of C2 or C4 olefines, or a mixture of such aliphatic hydrocarbons with one or more dimers of C3 or C4 olefines, or hydrogenation products of such hydrocarbons or mixtures. Suitable catalysts are the oxides of chromium, molybdenum or tungsten supported on alumina particularly g -alumina; there may also be present an oxide of titanium, zirconium, thorium or vanadium (e.g. 0,1-30%), and/or an oxide of an alkali metal (e.g. 1-10%), an alkaline-earth metal or zinc (e.g. 0,5-20%) or a rare-earth metal (e.g. 0,5-5%) and/or metallic platinum or palladium (e.g. 0,1-5%). Numerous combinations are specified but the following composition is particularly preferred: 5-40% chromium oxide, 1-10% potassium oxide, 0,5-5% cerium oxide and 93,5-45% g -alumina. Temperatures of 400-650 DEG C. and contact times of 0,1-60 seconds are preferred. A carrier gas such as hydrogen, nitrogen or methane, or other hydrocarbon containing up to 4 carbon atoms provided the temperature is below 550 DEG C., may be used. The process is particularly suitable for the aromatisation of triisobutylene or of a crude dimer of isobutylene containing 10-50% of trisobutylene when the aromatic product under suitable conditions is principally paraxylene.

公开(公告)号：CA632128A

公开(公告)日：1961-12-05

申请号：CA632128D

Applicant: HOECHST AG

Inventor： DIMMLING WERNER ,  SCHMETTERLING ARIE

公开(公告)号：CA551599A

公开(公告)日：1958-01-14

申请号：CA551599D

Applicant: HOECHST AG

Inventor： DIMMLING WERNER ,  BERNDT WALTER