阅读说明：本技术 用于生产第ii类和第iii类润滑剂的轮换操作 (Alternate operation for producing class II and class III lubricants ) 是由 G·P·施莱克尔 T-M·胡 于 2018-07-18 设计创作，主要内容包括：提供用于轮换加工原料以生产具有明显不同的粘度指数值的多个粘度等级的润滑剂基础油料的系统和方法。该系统和方法可涉及使用可在产生明显不同的粘度指数提升水平的条件下保持良好的芳族饱和活性的脱硫段加氢裂化催化剂。任选地,包括脱硫段加氢裂化催化剂的反应器可包括附加芳族饱和催化剂。该系统和方法可进一步涉及在第二脱硫段反应器中使用芳族饱和催化剂和脱蜡催化剂的组合,以可为在脱硫加氢裂化段中发生较低转化量的产物提供额外芳族饱和活性以使芳族饱和。该系统和方法也可增强对反应系统内的反应器的相对温度的控制。(Systems and methods are provided for shifting a process feedstock to produce a plurality of viscosity grades of lubricant base stock having significantly different viscosity index values. The systems and methods may involve the use of a sweet section hydrocracking catalyst that can maintain good aromatic saturation activity under conditions that produce significantly different levels of viscosity index increase. Optionally, the reactor including the sweet zone hydrocracking catalyst may include additional aromatic saturation catalyst. The systems and methods may further involve the use of a combination of an aromatic saturation catalyst and a dewaxing catalyst in the second desulfurization stage reactor to provide additional aromatic saturation activity to saturate aromatics for the products that undergo lower conversion amounts in the desulfurization hydrocracking stage. The system and method may also enhance control of the relative temperature of the reactors within the reaction system.)

具体实施方式

描述了本发明。本领域技术人员根据上文的详述可想到许多变动。所有这样的明显变动在所附权利要求书的完整预期范围内。