Abstract: Full hydrogenation lube base oil production unit usually include hydrotreating, hydrodewaxing and hydrofinishing. As noble metal catalysts are mostly used in hydrodewaxing and hrdrofinishing section, to avoid catalyst poisoning, sulfur and nitrogen content in recycle gas and feed is strictly restricted. As a result, hydrodewaxing and hydrofinishing sections are usually arranged in series downstream the hydrotreating sections. Normal full hydrogenation lube base oil production unit require two separated high pressure reaction systems and relative high pressure equipment. Two-stage technology requires longer process and more equipment. The traditional full hydrogenation lube base oil production unit consists of two reaction stages, 1st stage hydrotreating and 2nd stage hydrodewaxing-hydrofinishing. Using the high pressure hydrogen stripping technology, the two reaction stage was integrated into one-stage series system, which coude optimize the original process and reduce land occupation, with the investment saved by 8% and the total unit energy consumption reduced by 12%.

Key words: hydrotreating, High pressure hydrogen stripping, hydro-dewaxing, hydrofinishing, precious metal catalyst