Process for improving a re-refined lube oil stream

摘要

Embodiments of a process for improving a re-refined lube oil stream are provided. The process comprises the steps of introducing a gas stream comprising hydrogen (H2) and the re-refined lube oil stream comprising hydroprocessed used lube oil to a hydrogenation reactor that contain Group VIII catalyst. A gas to oil feed ratio rate of from about 30 to about 100 Nm3 H2/m3 is used to introduce the streams to the reactor. The hydroprocessed used lube oil is hydrogenated with the H2 in the reactor such that an effluent is formed containing hydrogenated re-refined lube oil having about 2 wt. % or less of aromatics and about 55 wt. % or less of naphthenes. The reactor is operating at a temperature of from about 250 to about 300° C.

主权项

1. A process for improving a re-refined lube oil stream, the process comprising the steps of:
processing a feed stream in a hydrotreatment zone to provide the re-refined lube oil stream; introducing a gas stream comprising hydrogen (H2) and the re-refined lube oil stream comprising no more than about 300 ppm, by weight, sulfur to a hydrogenation reactor containing Group VIII catalyst comprising a metal selected from the group consisting of platinum, palladium, and mixtures thereof at a gas to oil feed ratio rate of from about 30 to about 100 Nm3 H2/m3; and hydrogenating the re-refined lube oil stream with the H2 in the hydrogenation reactor operating at hydrogenation conditions such that an effluent is formed containing hydrogenated re-refined lube oil that has about 2 wt. % or less of aromatics, about 55 wt. % or less of naphthenes, and a viscosity index of at least about 120, the hydrogenation conditions including a reactor temperature of from about 250 to about 300° C.