14.種々の塩の添加が石炭の溶解性に及ぼす影響

抄録

The effect of various salts on the solubility of heavy coal extract fraction; pyridine insolubles (PI) obtained from the extraction of Upper Freeport (UF) coal with carbon disulfide-N-methyl-2-pyrrolidinon (CS_2-NMP) mixed solvent (1:1 by volume) was investigated. With the addition of various salts of chloride, the solubility depended on the amount of chloride anion, and it had little relation with cation species and their charge. It has been found that the addition of large amount of copper salts decreased the solubility, but for lithium and iron salts no decrease in the solubility was observed. These results can be explained from hard and soft acids and bases theory.