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公开(公告)号：US4814064A
公开(公告)日：1989-03-21
申请号：US90317
申请日：1987-08-27
CPC分类号： C10G69/06
摘要： A process for the conversion of an aromatic-rich, residual hydrocarbonaceous charge stock which possesses an aromatic hydrocarbon concentration greater than about 20 volume percent to selectively produce large quantities of high quality middle distillate while minimizing hydrogen consumption which process comprises the steps of: (a) reacting at least a portion of the residual hydrocarbonaceous charge stock and a hereinafter-described paraffin-rich, distillable hydrocarbonaceous stream boiling at a temperature greater than about 700.degree. F. (371.degree. C.) in a thermal coking zone at mild thermal coking conditions selected to provide thermal coking zone effluent rich in middle distillate; (b) separating the thermal coking zone effluent to provide a middle distillate fraction boiling in the range from about 300.degree. F. (149.degree. C.) to about 700.degree. F. (371.degree. C.) and a distillate hydrocarbonaceous stream boiling at a temperature greater than about 700.degree. F. (371.degree. C.); (c) reacting at least a portion of the distillate hydrocarbonaceous stream boiling at a temperature greater than about 700.degree. F. (371.degree. C.) with hydrogen, in a catalytic hydrocracking reaction zone, at hydrocracking conditions to convert at least a portion of the distillate hydrocarbonaceous stream to lower-boiling hydrocarbonaceous products including middle distillate and to convert at least 10 volume percent of the aromatic hydrocarbon compounds contained in the distillate hydrocarbonaceous stream to provide an increased concentration of paraffin hydrocarbon compounds in the resulting hydrocracking reaction zone effluent; (d) separating the resulting hydrocracking reaction zone effluent to provide a middle distillate product stream and a distillable paraffin-rich hydrocarbonaceous stream boiling at a temperature greater than about 700.degree. F. (371.degree. C.); (e) recovering the middle distillate product stream; and (f) reacting the distillable paraffin-rich hydrocarbonaceous stream boiling at a temperature greater than about 700.degree. F. (371.degree. C.) recovered in step (d) in the thermal coking zone of step (a).
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2.发明授权
公开(公告)号：US4792390A
公开(公告)日：1988-12-20
申请号：US98838
申请日：1987-09-21
CPC分类号： C10G69/06
摘要： A process for the conversion of an aromatic-rich, distillable gas oil charge stock which is essentially free from asphaltenic hydrocarbons and possesses an aromatic hydrocarbon concentration greater than about 20 volume percent to selectively produce large quantities of high quality middle distillate while minimizing hydrogen consumption which process comprises the steps of: (a) reacting the charge stock with hydrogen, in a catalytic hydrocracking reaction zone, at hydrocracking conditions including a maximum catalyst bed temperature in the range of about 600.degree. F. (315.degree. C.) to about 850.degree. F. (454.degree. C.) selected to convert at least a portion of the charge stock to lower-boiling hydrocarbon products including middle distillate and to convert at least 10 volume percent of the aromatic hydrocarbon compounds contained in the charge stock to provide an increased concentration of paraffin hydrocarbon compounds in the resulting hydrocracking reaction zone effluent; (b) separating the resulting hydrocracking reaction zone effluent to provide a middle distillate product stream and a paraffin-rich hydrocarbonaceous stream boiling at a temperature greater than about 700.degree. F. (371.degree. C.); (c) recovering the middle distillate product stream; (d) reacting the paraffin-rich hydrocarbonaceous stream recovered in step (b) in a thermal coking zone at mild thermal coking conditions including an elevated temperature from about 750.degree. F. (399.degree. C.) to about 950.degree. F. (510.degree. C.), a pressure from about 10 psig (69 kPa gauge) to about 150 psig (1034 kPa gauge) and a combined feed ratio from about 1 to about 2 to provide a thermal coking zone effluent; and (e) separating the thermal coking zone effluent to provide a fraction boiling in the range from about 300.degree. F. (149.degree. C.) to about 700.degree. F. (371.degree. C.).
摘要翻译： 一种富含芳香族，可蒸馏的粗柴油原料的转化方法，其基本上不含沥青烃，并具有大于约20体积％的芳族烃浓度，以选择性地生产大量高质量的中间馏分，同时最大限度地减少氢消耗 方法包括以下步骤：（a）在催化加氢裂化反应区中，在加氢裂化条件下使电荷原料与氢反应，包括最大催化剂床温度在约600°F（315℃）至约850℃ DEG（454℃）选择将至少一部分电荷原料转化成包含中间馏分的低沸点烃产物，并将至少10体积％的包含在电荷原料中的芳烃化合物转化成 在所得加氢裂化反应区流出物中增加石蜡烃化合物的浓度; （b）分离得到的加氢裂化反应区流出物，以提供中间馏分产物流和在大于约700°F（371℃）的温度下沸腾的富含石蜡的烃流; （c）回收中间馏分产物流; （d）在温和的热焦化条件下将在步骤（b）中回收的石蜡富含烃流在热焦化区中反应，包括升温约750°F（约399℃）至约950°F（510 ℃），约10psig（69kPa表压）至约150psig（1034kPa表压）的压力和约1至约2的组合进料比，以提供热焦化区流出物; 和（e）分离热焦化区流出物，以提供在约300°F（149℃）至约700°F（371℃）范围内沸腾的馏分。
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