公开(公告)号：US11447708B2

公开(公告)日：2022-09-20

申请号：US16717288

申请日：2019-12-17

Applicant: Exxonmobil Technology and Engineering Company

Inventor： Jason T. Calla ,  Will G. Fisher, Jr. ,  Eric D. Joseck ,  Seth D. Fortney

IPC: C10G65/12 ,  C10G67/04 ,  C10G45/54 ,  C10G65/04 ,  C10G65/08

Abstract: Systems and methods are provided for production of base stocks with a viscosity index of at least 120 and/or a sulfur content of 300 wppm or less and/or a kinematic viscosity at 100° C. of 3.0 cSt to 8.0 cSt by hydroconversion of a raffinate from aromatic extraction of a feed. The base stocks can further have a reduced content of 3+ ring naphthenes, such as 4.0 wt % or less, or 1.0 wt % or less. The base stocks can be produced by performing an elevated amount of feed conversion relative to 370° C. during hydroconversion of the raffinate, and optionally additional conversion during catalytic dewaxing of the hydroconverted raffinate. The base stocks can optionally be blended with additional base stocks and/or lubricant additives for production of lubricant compositions.