| 摘要 |
Provided are a 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene crystal having a prescribed crystal form, and a method for producing 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene crystals, the method including: a step for precipitating first crystals of 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene from a first solution obtained by dissolving 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene in at least one type of solvent selected from aromatic hydrocarbons, and then obtaining a mother solution by solid-liquid separation; a step for preparing a second solution in which 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene is dissolved using at least part of the mother solution; and a step for precipitating second crystals of 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene from the second solution at a temperature of 60ºC or lower. |
