Optimized method for processing plastic pyrolysis oils for improving their use

• Main Authors: WEISS, Wilfried, BONNARDOT, Jerome
• Format: Patent
• Language: English
• Published: 21.07.2022
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The present invention relates to a method for processing a plastic pyrolysis oil, comprising: a) a step of selective hydrogenation of the feedstock in the presence of at least hydrogen and at least one selective hydrogenation catalyst at a temperature of between 100 and 150 °C, a partial pressure of hydrogen of between 1.0 and 10.0 MPa absolute and an hourly volume rate of between 1.0 and 10.0 h-1, in order to obtain a hydrogen effluent; b) a step of hydroprocessing said hydrogen effluent in the presence of at least hydrogen and at least one hydroprocessing catalyst at a temperature of between 250 and 370 °C, a partial pressure of hydrogen between 1.0 and 10.0 MPa absolute and an hourly volume rate of between 0.1 and 10.0 h-1, in order to obtain a hydroprocessing effluent; c) a step of separating the hydroprocessing effluent in the presence of an aqueous flow at a temperature of between 50 and 370 °C in order to obtain at least one gaseous effluent, one aqueous liquid effluent and one liquid hydrocarbon effluent; e) a step of recycling at least a fraction of the obtained product.