12.インバース液体クラマトグラフィー法を用いた石炭とCS_2/NMP混合溶媒との相互作用の研究

抄録

Interactions between four Argonne premium coal samples and various organic compounds including carbon disulfide (CS_2) and N-methyl-2-pyrrolidinone (NMP), were investigated by inverse liquid chromatography. For higher-rank Pittsburgh No.8, Upper Freeport and Pocahontas coals, the interaction with CS_2 was greater than that with NMP, while for lower-rank Illinois No.6 and Beulah Zap coals, the tendency was opposite. For high-rank coals, the interaction with CS_2 was greatly enhanced by coexistence of NMP, while for lower-rank coals it was not observed. In addition, the enhancement of interaction for high-rank coals was also observed in the case of CS_2/dimethylformamide (DMF) and CS_2/Pyridine systems, which are known to give high extraction yields as CS_2/NMP one. These results suggest that CS_2 can interact strongly with any interacting sites in high-rank coals when NMP (or DMF) coexists with them. Therefore, the interaction among CS_2, NMP (or DMF) and any interacting sites in high-rank coals is important, not that between CS_2 and NMP.