…Organic ion exchangers include those made from sulfonated coal, but the most common are ion exchange resins, which use a mesh structure of organic polymers as a backbone substrate to which a large number of exchange groups corresponding to acids or alkalis are introduced, and the ions in the solution are exchanged using the reaction characteristics of the exchange groups. There is also a procedure (ion exchange extraction) in which a polymer liquid ion exchanger that is poorly soluble in water is dissolved in an appropriate organic solvent, and specific ions in the water are extracted by contacting this organic solution with water to the ion exchanger in the solvent. For example, cations are extracted from the aqueous phase using a solution of the organophosphorus compound di(2-ethylhexyl)phosphoric acid (abbreviated D2EHPA) dissolved in tyrosine. … *Some of the terminology that refers to "ion exchange extraction" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…有機質のイオン交換体としては石炭をスルホン化したようなものもあるが,代表的なものはイオン交換樹脂であり,有機物重合体の網目構造を骨格基質としてここに酸やアルカリに相当する交換基を多数導入し,その交換基の反応特性により溶液中のイオンを交換する。また,水に難溶性の高分子液状イオン交換体を適当な有機溶媒に溶かし,この有機溶液と水を接触させることにより水中の特定イオンを溶媒中のイオン交換体に抽出する操作(イオン交換抽出)もある。たとえば,有機リン化合物であるジ(2‐エチルヘキシル)リン酸(略号D2EHPA)をチロシン溶解したものを用い,水相から陽イオンの抽出が行われる。… ※「イオン交換抽出」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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