Process for whole crude oil conversion to chemicals through crude conditioning and steam cracking to maximize petrochemicals yield

A process for converting whole crudes and other heavy hydrocarbon streams to produce olefins and/or aromatics, the process comprising:

• separating a hydrocarbon feedstock in a first integrated separation device into at least a light boiling fraction, a medium boiling fraction, and a high boiling residue fraction;
• hydrocracking the high boiling residue fraction and pyrolysis oil in a first conditioning unit, comprising a resid hydrocracking system, to produce a hydrocracked effluent;
• feeding at least a portion of the hydrocracked effluent to a second conditioning unit to produce a steam cracker feedstream;
• destructively hydrogenating the medium boiling fraction in the second conditioning unit to produce additional hydrocarbons in the steam cracker feedstream;
• feeding the steam cracker feedstream and the light boiling fraction to a steam cracker to convert hydrocarbons therein producing a steam cracker effluent.