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Process for the Production of High Quality Middle Distillates from Mild Hydrocrackers and Vacuum Gas Oil Hydrotreaters in Combination with External Feeds in the Middle Distillate Boiling Range
Process for the Production of High Quality Middle Distillates from Mild Hydrocrackers and Vacuum Gas Oil Hydrotreaters in Combination with External Feeds in the Middle Distillate Boiling Range
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机译:中温沸腾范围内由轻度加氢裂化器和减压瓦斯油加氢处理机与外部进料结合生产高质量中间馏分的方法
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摘要
PURPOSE: Provided are a mild hydrocracking apparatus using external material in the boiling range of middle distillates and a method for producing high quality middle distillates from a vacuum light oil hydrotreating apparatus. CONSTITUTION: The method includes the steps of: (a) passing a hydrocarbonaceous feedstock to a first hydroprocessing zone having one or more beds containing hydroprocessing catalyst; (b) passing the effluent of step (a) directly to a hot high pressure separator; (c) passing the vapor stream from step (b) after cooling and partial condensation to a hot hydrogen stripper containing at least one bed of hydrotreating catalyst; (d) passing the overhead vapor stream from the hot hydrogen stripper of step (c), after cooling and contacting with water, to a first cold high pressure separator; (e) passing the liquid stream from the hot hydrogen stripper of step (c) to a bed of hydroprocessing catalyst in the second reactor stage; (f) passing the overhead from the cold high pressure separator of step (d) to an amine absorber; (g) passing the separator bottoms of step (b) to a second reaction stage; (h) passing the vapor stream of step (g) after cooling to a second cold high-pressure separator; (i) passing the liquid effluent of step (g) after cooling to the cold high-pressure separator of step (h) to separate hydrogen and light hydrocarbonaceous gases from the liquid effluent; (j) passing the vapor stream from steps (h) and (i) after further cooling and separation of condensate, to the make-up hydrogen compressor; (k) passing the compressed hydrogen from the make-up hydrogen compressor to the primary reactor loop; and (l) passing the liquid effluent from steps (h) and (i) to the fractionation system.
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