A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreating step is under conditions such that the amount of conversion to 343° C. minus is less than 5 wt. % of the feedstock and the VI increase is less than 4 VI over the feedstock. Hydrodewaxing uses a low alpha catalyst and hydrofinishing is accomplished with a catalyst based on the M41S family.
申请公布号
EP1551942(A2)
申请公布日期
2005.07.13
申请号
EP20030777738
申请日期
2003.10.07
申请人
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
发明人
CODY, IAN, A.;MURPHY, WILLIAM, J.;HANTZER, SYLVAIN, S.;LARKIN, DAVID, W.;GALLAGHER, JOHN, E., JR.;KIM, JEENOK, T.