| abstract |
NEW MATERIAL:A compound of the formula (R 1 is 2W4C alkylene; R 2 and R 3 are H, alkyl, aryl, alkali metal or alkaline earth metal; n is an integer 1W30). n EXAMPLE: N-(Trioxyethylene)-N,N-dicarboxymethylamine. n USE: A raw material for synthesizing chelate resins and a sequestering agent. n PROCESS: Iminodiacetic acid or a salt or ester thereof is reacted with an alkylene oxide under pressurized closed conditions of 10W100atm to give the aimed compound of the formula. Preferably, the reaction is carried out by using the alkylene oxide at (1:n)W[1:(n+0.2)] molar ratio between the alkylene oxide and the iminodiacetic acid, etc. The chelate resin obtained by using the compound of the formula is excellent in its high selective adsorptivity and high adsorption rate for various metallic ions and high exchange capacity. n COPYRIGHT: (C)1984,JPO&Japio |