| 摘要 |
A hydrocarbon conversion process comprises contacting a feed of an alkylbenzene or a mixture of alkylbenzenes under isomerisation conditions in the vapour liquid phase with a catalyst comprising zeolite NU-4. The feed is preferably a xylene or a mixture of xylenes, optionally containing up to 25% by weight ethylbenzene. Compared with a conventional amorphous silica-alumina catalyst for xylenes isomerisation, the zeolite NUB catalyst produces more para-xylene, destroys a much higher proportion of ethylbenzene (where present) and destroys less of the xylenes. |
