A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreated feedstock is hydrodewaxed using a dewaxing catalyst that has been selectively activated by oxygenate treatment. The hydrodewaxed product may then be hydrofinished....http://www.google.fr/patents/US20050040073?utm_source=gb-gplus-shareBrevet US20050040073 - Process for preparing basestocks having high VI using oxygenated dewaxing catalyst
Process for preparing basestocks having high VI using oxygenated dewaxing ...
Numéro de demande: 10/678,680 Numéro de publication: US 2005/0040073 A1 Date de dépôt: 3 oct. 2003 Brevet délivré: US7077947 ( Date de délivrance 18 juil. 2006)
