| 发明名称 | Synthesis of rare earth metal extractant | ||
| 摘要 | A rare earth metal extractant in the form of a dialkyl diglycol amic acid is synthesized by reacting diglycolic anhydride with a dialkylamine in an aprotic polar solvent, with a molar ratio of dialkylamine to diglycolic anhydride being at least 1.0, and removing the aprotic polar solvent. | ||
| 申请公布号 | US8889903(B2) | 申请公布日期 | 2014.11.18 |
| 申请号 | US201113176252 | 申请日期 | 2011.07.05 |
| 申请人 | Shin-Etsu Chemical Co., Ltd.;Nissin Chemical Industry Co., Ltd. | 发明人 | Sakaki Kazuaki;Sugahara Hiroto;Ohashi Tetsuya;Kume Tetsuya;Ikka Masahiko;Naganawa Hirochika;Shimojo Kojiro |
| 分类号 | C07C231/02 | 主分类号 | C07C231/02 |
| 代理机构 | Westerman, Hattori, Daniels & Adrian, LLP | 代理人 | Westerman, Hattori, Daniels & Adrian, LLP |
| 主权项 | 1. A method for synthesizing a rare earth metal extractant in the form of a dialkyl diglycol amic acid having the general formula (I):wherein R1 and R2 are each independently a straight or branched alkyl group of 6 to 18 carbon atoms, comprising the steps of: reacting diglycolic anhydride with a dialkylamine in an aprotic polar solvent selected from the group consisting of acetone and acetonitrile, with a molar ratio (B/A) of dialkylamine (B) to diglycolic anhydride (A) being in a range of 1.0 to 1.2, and removing the aprotic polar solvent. | ||
| 地址 | Tokyo JP | ||