| 摘要 |
<p>A nitrilotriacetate salt (I) is prepd. by: (a) partially hydrolysing a mixt. of stoichiometric amts. of nitrilotriacetonitrile (II) and an alkali metal hydroxide (III) in water at 25-85, pref. 40-70 deg.C; (b) boiling this mixt. for 30 minutes min.; (c) adding 0.04 wt.% min. (w.r.t. mixt.) of bleaching agent (IV); and (d) recovering a prod. In pref. methods, crystalline (I) or a soln. of (I) in water (40 wt.% max.), partic. where (I) is trisodium nitrilotriacetate (Ia), are the prods.</p> |
