Method For Processing A Feedstock From A Renewable Source, For The Production Of Bio Based Olefins

Abstract: The present invention relates to a method for processing a feedstock from a renewable source comprising triglycerides and/or fatty acids and/or esters, said method comprising the steps of: a) a step of hydrotreating said feedstock in the presence of hydrogen and at least one hydrotreatment catalyst in a fixed bed, said step being performed at a temperature of between 280 and 410°C, a relative pressure of between 2.0 and 13.0 MPa, and a liquid hourly space velocity of between 0.3 and 5 h-1, and obtaining a hydrotreated effluent; b) a step of hydrocracking the hydrotreated effluent obtained in step a) in the presence of hydrogen and at least one hydrocracking catalyst in a fixed bed, at a temperature of between 280 and 410°C, said step being performed at a pressure of between 2.0 MPa and 13.0 MPa and at a liquid hourly space velocity of between 0.5 and 10 h-1, and obtaining a hydrocracked effluent; c) a step of separating the hydrocracked effluent obtained in step b), and obtaining at least one gaseous effluent comprising hydrogen and a liquid hydrocarbon effluent; d) a step of stripping the liquid hydrocarbon effluent obtained in step c), and obtaining at least one off-gas cut and a stripped liquid effluent; e) a step of fractionating the stripped liquid effluent obtained in step d), and obtaining at least one paraffin-rich naphtha cut; f) a step of steam cracking at least some, preferably all, of the naphtha cut obtained in step e) and obtaining at least one bio-based gaseous effluent comprising ethylene and propylene.

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