PROCESS FOR SELECTIVELY PRODUCING LIGHT OLEFINS

摘要

The invention is related to a catalyst and a process for selectively produci ng light (i.e., C2-C4) olefins from a catalytically cracked or thermally cracke d naphtha stream. The naphtha stream is contacted with a catalyst containing from about 10 to 50 wt.% of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions. The catalyst s do not require steam activation.