{HEAD ~ The present invention} relates to a process for up grading products resulting from {TAIL ~ the steam cracking} of hydrocarbons which comprises bringing the steam cracking reaction products in contact with a multifunctional Zn ZSM 5 zeolite/Cr2 O3 /Al2 
{ HEAD ~ The present invention } relates to a process for up grading products resulting from { TAIL ~ the steam cracking } of hydrocarbons which comprises bringing the steam cracking reaction products in contact with a multifunctional Zn ZSM 5 zeolite / Cr2 O3 /Al2
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