カワムラ　クニオ   KAWAMURA Kunio   川村　邦男    所属   広島修道大学  人間環境学部    職種   教授
言語種別	英語
発行・発表の年月	2006/09
形態種別	学術論文
招待	招待あり
標題	Influence of pH and diluent for the ion-pair solvent extractionof aromatic carboxylic acids using quaternary ammonium salts
執筆形態	共著
掲載誌名	Sep. Sci. Tech.
掲載区分	国外
巻・号・頁	41(12),pp.2795-2806
担当範囲	Corresponding author
著者・共著者	◎Kunio Kawamura, Keiji Takahashi, Akitsugu Okuwaki
概要	The influence of pH and diluent on the ion‐pair solvent extraction of benzene polycarboxylic acids have been investigated for the separation of the coal oxidation products, which are formed by the treatment with alkaline solutions at high temperatures. Although the extent of the solvent extraction of benzoic acid (1BE) with a quaternary ammonium reagent (tri‐n‐octylmethylammonium chloride) into chloroform and benzene did not change at a very acidic and alkaline solutions, those of 1,2‐benzenedicarboxylic acid (12BE) and trimellitic acid (124BE) somewhat decreased at very low pH and very high pH. The inspection of the correlation between the values of Kex and several parameters of the diluent implies that the magnitude of Kex can be described by using the dielectric constant and the solubility parameter of diluent.