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Petrochemicals are chemical compounds derived from hydrocarbons, mainly petroleum and gas . they will even be obtained from various renewable materials like sugarcane and corn. Petrochemicals are classified on the idea of their chemical structure, namely, olefins, aromatics, and synthesis gas hydrocarbon. Olefin hydrocarbons include ethylene and propylene, while benzene, toluene and xylene belong to the category of aromatic hydrocarbons.