LUBRICATING OIL REFINING METHOD AND ITS APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a lubricating oil refining method which can accurately obtain the information on the molecular structure of a component extracted or separated with a supercritical fluid, and its apparatus. SOLUTION: The lubricating oil refining method comprises a separation step (S10) of extracting or separating each component of a lubricating oil in which a plurality of different components are mixed by supercritical fluid extraction method or supercritical fluid chromatography and a detection step (S12) of monitoring the infrared absorption of the sample extracted or separated in the separation step (S10) to obtain the information of the molecular structure on the component extracted or separated in the separation step (S10) based on the infrared absorption of the sample monitored in the detection step (S12). COPYRIGHT: (C)2005,JPO&NCIPI