BLOCKED OPERATION FOR GROUP II AND GROUP III LUBRICANT PRODUCTION

• Main Authors: HOO TECK-MUI, SCHLEICHER GARY
• Format: Patent
• Language: Chinese; English
• Published: 17.03.2020
• 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; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

Systems and methods are provided for block processing of a feedstock to produce multiple viscosity grades of lubricant base stocks with substantially different viscosity index values. The systems andmethods can involve the use of a sweet stage hydrocracking catalyst that can maintain good aromatic saturation activity under conditions that produce substantially different levels of viscosity indexuplift. Optionally, the reactor including the sweet stage hydrocracking catalyst can include additional aromatic saturation catalyst. The systems and methods can further involve using a combination ofaromatic saturation catalyst and dewaxing catalyst in a second sweet stage reactor, so that additional aromatic saturation activity is available for saturation of aromatics for products that undergolower amounts of conversion in the sweet hydrocracking stage. The systems and methods can also allow for increased control over the relative temperatures of reactors within a reaction system. 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