Patent ID: 7914665
Filing Date: 2011-03-29
Classification: C10G,G01N

Abstract:
1. A process to prepare lube basestocks from the lube oil boiling range feedstreams comprising: a) solvent dewaxing a lube oil boiling range feedstream in a solvent dewaxing stage operated under effective solvent dewaxing conditions thereby producing at least a partially dewaxed fraction, wherein the solvent dewaxing solvent is selected from the group consisting of methyl ethyl ketone, methyl isobutyl ketone, propane, ethane, and mixtures thereof; and b) contacting said partially dewaxed fraction with a hydrodewaxing catalyst in the presence of a hydrogen-containing treat gas in a reaction stage operated under effective mild hydrodewaxing conditions, thereby producing a reaction product comprising at least a gaseous product and liquid product,