Cyclic process for upgrading a hydrocarbon or hydrocarbon-forming feed using a ZSM-5 zeolite

摘要

In a cyclic process for upgrading a hydrocarbon or hydrocarbon- forming feed by steps including regenerating of the zeolite catalyst, the operating period or cycle is substantially increased by using a ZSM-5 zeolite having a silica-to-alumina mol ratio in the range 61 to 140.