| 摘要 |
PURPOSE:To obtain, without any trouble in high yield, the high-purity compound which is used as an intermediate of heat-sensitive, pressure-sensitive dyes, xanthene dyes or fluorescent dyes, by purifying crude N,N-diethylaminophenol under specific conditions. CONSTITUTION:Reductive alkylation of an aminophenol with acetaldehyde is effected in the presence of a catalyst such as Pt, Pd in a solvent such as methanol, at room temperature to 150 deg.C under pressure with hydrogen to give N,N-diethylaminophenol. Then, in an inert gas (N, Ar) atmosphere, the product is brought into contact with solvents such as water or hexane over 50 deg.C and cooled down to give purified N,N-diethylaminophenol. The process according to the present invention solves the problems such as corrosion of the materials, excessive waste water and the quality of the product. |
