| 摘要 |
The present invention relates to a process for selectively producing C<SUB>3 </SUB>olefins from a catalytically cracked or thermally cracked naphtha stream by fractionating the naphtha feed to obtain at least a C<SUB>6 </SUB>rich fraction and feeding the C<SUB>6 </SUB>rich fraction into a reaction stage at a point wherein the residence time of the C<SUB>6 </SUB>rich fraction is minimized.
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