| 摘要 |
PURPOSE:To easily separate and remove impurities from crude 1,3-dimethyl-2- imidazolidinone and purify the compound at a low cost by bringing the crude compound into contact with a double salt containing MgO and/or SiO2 as a component. CONSTITUTION:Crude 1,3-dimethyl-2-imidazolidinone is purified by contacting with a double salt containing MgO and/or SiO2 as a compositional component (preferably a double salt further containing Al2O3, preferably one or more double salts selected from 2MgO.Al2O3.xH2O, 3MgO-Al2O3.xH2O, 5MgO-Al2 O3.xH2O, MgO.Al2O3.2SiO2.xH2O, 2MgO.Al2O3.SiO2.xH2O, etc.) preferably at 15-100 deg.C. 1,3-Dimethyl-2-imidazolidinone is an aprotic polar compound having high boiling point and excellent characteristics and, accordingly, ti can be used as a solvent for various reactions. |
