A process for making lower olefins from a heavy hydrocarbon feed by use of a combination of two vapor-liquid separation devices, and, then, pyrolytically cracking the light fraction of the heavy hydrocarbon feed to thereby produce a lower olefin product.

 
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< Promotors for controlling acidity and pore size of zeolite catalysts for use in alkylation

< Olefin production process

> Process for production of light olefins from hydrocarbon feedstock

> Extractive distillation

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