PREPARATORY HIGH PERFORMANCE LIQUID CHROMATOGRAPHIC (HPLC) SEPARATION SYSTEM AND TECHNIQUE FOR QUANTITATIVE FRACTIONATION OF TOTAL VACUUM RESID

摘要

A method and system for conducting chromatographic analysis of a total vacuum resid to provide quantification of eight classes of compounds (i.e., asphaltenes, saturates, 1-4+ ring aromatics, sulfides, and polars) contained within the total vacuum resid without prior de-asphalting are disclosed. The system is also capable of conducting chromatographic analysis of a vacuum gas oils and de-asphalted oils to provide quantification of seven classes of compounds (i.e., saturates, 1-4+ ring aromatics, sulfides, and polars). The system is also capable of conducting chromatographic analysis of a resid to identity the presence of and provide quantification of asphaltenes.

主权项

1. A method of performing quantitative fractionation of a total vacuum resid sample, wherein the total vacuum resid sample containing asphaltenes containing saturates fraction, at least one aromatic ring class fraction, sulfides fraction, and polars fraction, comprising:
providing a total vacuum resid sample; introducing the total vacuum resid sample in a separation system having a first separation column, a second separation column and a third separation column; performing an asphaltenes precipitation process in the first separation column to precipitate asphaltenes from the total vacuum resid sample; performing a saturates fraction removal process in the second separation column to extract a saturates fraction from the sample; performing an aromatic ring class fraction removal process in the second separation column and third separation column to extract at least one aromatic ring class fraction from the sample; performing a sulfides fraction removal process in the third separation column to extract a sulfides fraction from the sample; performing a polars fraction removal process in the second separation columns to extract a polars fraction from the sample; and performing an asphaltenes removal process in the first separation column to extract the precipitated asphaltenes from the sample.