| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide new 2,2-bis (4-aminophenyl) propane of high purity, and provide a method of efficiently and easily manufacturing it as powder. <P>SOLUTION: This method of manufacturing 2,2-bis (4-aminophenyl) propane includes: a step (1) of evaporating a component which mainly contains unreacted acetone, extraction solvent and aniline, and whose boiling point is lower than that of 2,2-bis (4-aminophenyl) propane from a reaction liquid obtained by condensing acetone and aniline hydrochloride under the presence of water and then performing alkali treatment; and a step (2) of adding an aromatic hydrocarbon based solvent to it, heating and melting them, and then cooling and crystallizing 2,2-bis (4-aminophenyl) propane. <P>COPYRIGHT: (C)2012,JPO&INPIT |
