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FRACTIONATION OF DE-ASPHALTED OIL OF VACUUM RESID USING PREPARATIVE HIGH PERFORMANCE LIQUID CHROMATOGRAPHIC SEPARATIONS
FRACTIONATION OF DE-ASPHALTED OIL OF VACUUM RESID USING PREPARATIVE HIGH PERFORMANCE LIQUID CHROMATOGRAPHIC SEPARATIONS
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机译:制备型高效液相色谱法分离减压渣油精制油
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摘要
Two quantitative separation approaches to fractionate de-asphalted oils (DAOs) into seven classes of compounds (saturates, 1-4+ ring-aromatics, sulfides, and polars). In the first step (named as SGS) of present invention, the DAO of a petroleum vacuum resid is separated in to four classes of compounds, namely saturates, aromatics, and sulfides. In this first step of separation, about 3 grams of a DAO can be separated. Whereas in the second step (named as ARC separation) of invention, only less than 300 mg of the aromatic fraction obtained in SGS (described above) can be further fractionated at very low temperature (about 40 degrees centigrade) into 4 fractions, namely 1-ring, 2-ring, 3-ring, and 4+-ring aromatics. The present invention protocol is suitable for a wide range of compositionally different DAOs of petroleum vacuum resids.
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