PRODUCTION OF HIGH VISCOSITY LUBRICATING OIL STOCK WITH IMPROVED ZSM-5 CATALYST

摘要

The present invention is a process for producing a high viscosity index and low pour point lubricating oil base stock which comprises catalytically converting a hydrotreated hydrocarbon lube oil feedstock containing waxy paraffins in the presence of hydrogen and in the presence of a low acidity Z SM- 5 catalyst having a highly dispersed noble metal component. The ZSM-5 cataly st is subjected to controlled acidity reduction to an alpha value below 15 prio r to incorporation of the noble metal component.