金属キレ-トの利用に関する研究-10-EDTA-ビス(N-アルキルアミド)キレ-ト界面活性剤

概要

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Some EDTA-bis (N-alkylimides) were synthesized by the reaction of ethylenediaminetetraacetic acid (EDTA) with hexyl, octyl, nonyl, decyl, undecyl and dodecyl amines. The hydrolysis of the imides gave the corresponding EDTA-bis (N-alkylamides). Some metal chelates were obtained by the reaction of these amides with Fe (III), Cu (II), Zn (II), Ni (II), Co (II) and Al (III) nitrates. The presumed formulas of the chelates are as follows : [Fe (OH) A (H2O)2], [CuA], [ZnA], [NiA], [CoA (H2O)2], [Al (OH) A (H2O)], where A is a ligand anion formed from EDTA-bis (N-alkylamides) by the elimination of 2H+. These chelates were soluble in some organic solvents, but did not dissolve in water. Some metal chelates had superior dispersing power for TiO2 pigment in organic solvent. For instance, the 0.025% toluene-butanol (20 : 1) solution (about 30 ml) of EDTA-bis (N-dodecylamide) nickel chelate needed 128 h for complete sedimentation of dispersed 0.3 g TiO2 (Rutile type, having no treated surface), while the solvent (containing no chelate) needed only 0.5h for the same sedimentation experiment.
日本油化学会の論文