Chevron Lummus Global, a joint venture between Chevron U.S.A. Inc. and Lummus Technology, offers ISODEWAXING dewaxing and ISOFINISHING hydrofinishing technologies for the production of lubes.
The ISODEWAXING process catalytically isomerizes the molecular structure of the wax into C20+ isoparaffins, which have high VI, low pour points, and excellent thermal and oxidation stability. ISODEWAXING preserves the base oil's paraffinicity, producing higher product VI and/or higher yields than other dewaxing processes. A broad range of feeds can be processed – from feeds with low wax content to those with close to 100% wax – to produce a broad range of base oils with VI ranging from 95 to 140 and above. Since it was first commercialized in 1993, nearly every new lubricants facility built has been based on this technology.
The effluent of the ISODEWAXING unit is sent to the ISOFINISHING process, which uses noble metal catalysts to make products with superior color (practically water-white), excellent oxidation stability, and almost complete removal of aromatics. This is accomplished at lower reactor temperature and pressure and with smaller reactor volumes than processes using base metal catalysts. When producing white oils, the ISOFINISHING process can be used as a stand-alone unit.