CS2/NMP extraction of immature source rock concentrates
Guo, SH; Li, SY; Qin, KZ
| HERO ID | 1170805 |
|---|---|
| In Press | No |
| Year | 2000 |
| Title | CS2/NMP extraction of immature source rock concentrates |
| Authors | Guo, SH; Li, SY; Qin, KZ |
| Journal | Organic Geochemistry |
| Volume | 31 |
| Issue | 12 |
| Page Numbers | 1783-1795 |
| Abstract | Eleven Chinese immature source rock concentrates from the immature oil formations in four different depressions were extracted ultrasonically with a mixture of CS2 and N-methyl-2-pyrrolidinone (CS2/NMP) at room temperature. The samples were also extracted with CHCl3 and a mixture of methanol/acetone/chloroform (MAC) for comparison. The solvent system CS2/NMP is very efficient for the extraction of immature source rock concentrates, giving much higher extraction yields than CHCl3 or MAC. The composition of the extracts using different solvent mixtures is also different. Model compound tests indicate that no chemical reactions have taken place between the NMP and the substrates in the extraction. These results suggest that there are abundant non-covalent bond interactions in the organic matter of the immature source rock concentrates. The fact that CS2/NMP mixed solvent extracts more than MAC and CHCl3 is not only because it can dissolve higher molecular weight fractions, but also because it has stronger ability to disrupt the complex interactions existing between the soluble and insoluble fractions. Biomarker distributions in the saturated hydrocarbon fractions are different for different solvent systems, suggesting that care should be taken when comparing the biomarker parameters in source rocks when using different solvents for extraction. (C) 2000 Elsevier Science Ltd. All rights reserved. |
| Wosid | WOS:000165957000038 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science 000165957000038 |
| Is Public | Yes |
| Keyword | source rock concentrate; immature source rock; solvent extraction; CS2/NMP; methanol/acetone/chloroform; chloroform |
| Is Qa | No |