Process to prepare a process oil

Details Process to prepare a process oil Process to prepare a process oil

2007-03-06

2007-03-06

Nguyen, Tam M. (Department: 1764)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By addition of extraneous agent, e.g., solvent, etc.

C585S804000, C585S836000, C585S838000, C208S314000

Reexamination Certificate

active

10257110

ABSTRACT:
A process to prepare a process oil with an aromatic content of more than 50 wt % (according to ASTM D 2007) and a polycyclic aromatics (PCA) less than 3 wt % (according to IP 346) by (a) contacting a feed mixture of a petroleum fraction boiling in the lubricating oil range and an aromatic rich hydrocarbon fraction with a polar solvent in a counter-current liquid-liquid extraction column, wherein the process oil is obtained by removing the polar solvent from the top product and an extract is obtained by removing the polar solvent from the top product and an extract is obtained by removing the polar solvent from the bottom product.

REFERENCES:
patent: 5840175 (1998-11-01), Aldous et al.
patent: 5853569 (1998-12-01), Aldous et al.
patent: 6080302 (2000-06-01), Aldous et al.
patent: 0 417 980 (1991-03-01), None
patent: 0 950 703 (1999-10-01), None

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