| 摘要 |
PURPOSE:To obtain the titled compound useful as a water softener in high yield, by reacting triethanolamine with an alkali metal hydroxide and/of alkaline earth metal hydroxide in the presence of water and a catalyst containing copper and zirconium. CONSTITUTION:Triethanolamine is reacted with an alkali metal hydroxide and alkaline earth metal hydroxide (e.g., NaOH, or KOH) in the presence of water and a catalyst containing copper and zirconium to give nitrotriacetate. The reaction is preferably carried out at 140-220 deg.C at 0-20kg/cm<2>. The use of the catalyst containing safe copper and zirconium instead of cadmium catalyst not only improves heat resistance and prolongs life of catalyst, but also raises selectivity and catalytic activity. An amount of the catalyst used is 1-70wt%, preferably 10-30wt%. |
