METHOD FOR CONVERTING A HEAVY HYDROCARBON FEEDSTOCK INCLUDING SELECTIVE DE-ASPHALTING UPSTREAM FROM THE CONVERSION STEP

• Main Authors: Feugnet, Frédéric, Majcher, Jerome, Merdrignac, Isabelle
• Format: Patent
• Language: English; French; German
• Published: 12.07.2023
• 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; PYROLIGNEOUS ACID; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE; WORKING-UP PITCH, ASPHALT, BITUMEN, TAR

The invention relates to a method for converting a heavy charge of hydrocarbons comprising the following steps: a) at least one step of selective deasphalting of the heavy charge of hydrocarbons by liquid/liquid extraction which would allow for the separation of at least one asphalt fraction, at least one deasphalted oil fraction, b) a stage of hydroconversion of the deasphalted oil fraction in the presence of hydrogen in at least one three-phase reactor, under conditions allowing for the obtention of an effluent comprising a gaseous fraction mainly containing the H2 and H2S compounds, and a liquid fraction with a reduced amount of Conradson carbon, metals, sulfur and nitrogen, c) a step for separating the effluent from step b) to obtain a gaseous fraction mainly containing the H2 and H2S compounds and a liquid fraction reduced in Conradson carbon, metals, sulfur and nitrogen.