Hydrotreating process

Abstract

Abstract AN IMPROVED METHOD FOR HYDROTREATING HEAVY HYDROCARBON OILS IS DISCLOSED HEREIN WHICH PLROVIDES FOR HYDROCRACKING, HYDROGENATION, HYDRO-DESULFURIZATION, AND NITROGEN REMOVAL UTILIZING A SINGLE REACTION VESSEL HAVING UPPER AND LOWER REACTION ZONES DIVIDED BY A TRANSVERSE ONE WAY GRID. THE METHOD COMPRISES PASSING A HEAVY HYDROCARBON OIL, WITH HYDROGEN GAS, AND FINE PARTICULATE CATALYST UPWARDLY THROUGH THE LOWER REACTION ZONE AT A RATE TO ESTABLISH A CONTINUOUS FLOW STIRRED REACTOR, CONTACTING THE HYDROCARBON OIL WITH HYDROGEN IN THE PRESENCE OF THE FINE PARTICULATE CATALYST IN THE LOWER REACTION ZONE AT A TEMPERATURE OF UP TO 780* F. AND AT A HIGH PRESSURE AND PASSING THE CONTRACTECD HYDROCARBON OIL, HYDROGEN GAS AND CATALYST SLURRY UPWARD THROUGH THE ONE WAY GRID INTO THE UPPER REACTION ZONE, WHILE SIMULTANEOUSLY PREVENTING ANY RETURN (BACKMIXING) FLOW OF HYDROCARBON OIL, HYDROGEN GAS, AND CATALYST SLURRY BACK INTO THE LOWER REACTION ZONE. TEMPERATURE CONTROL OF THE PROCESS IS OBTAINED BY CONTROLLING THE TEMPERATURE OF THE VARIOUS FEED MATERIALS. THE UPPER REACTION ZONE IS MAINTAINED AT A HIGHER TEMPERATURE FROM ABOUT 800* F. TO ABOUT 850* F. BY THE CON TINUING EXOTHERMIC REACTION. A LOWER BOILING HYDROCRACKED, DENITROGENIZED, AND DESULFURIZED HYDROCARBON PRODUCT TOGETHER WITH SPENT CATALYST SLURRY AND VARIOUS GASES ARE WITHDRAWN AS EFFLUENT FROM THE REACTION VESSEL.

Inventors

• 👤 Roger P Van Driesen

Bibliographic Details