FIELD: chemistry of metalloorganic compounds, chemical technology.
SUBSTANCE: invention relates to a method for preparing copper (II), zinc (II), nickel (II) and cobalt (II) nitrilotri-(methylenephosphonates)(2-) that involves crystallization from aqueous solutions prepared by interaction of metal (II) compound with nitrilotri-(methylenephosphonic) acid or its salt with sodium potassium or ammonium in aqueous medium at temperature from -5°C to 105°C under atmosphere pressure. As a reactive of the metal (II) compound source the waste from manufacturing printing plates and galvanic covers can be used. The end products can be used in preparing the complex electrolytes and solutions for applying metallic covers by electrochemical and chemical methods in aims for inhibition against the equipment corrosion, and for preparing other compounds of metals with nitrilotri-(methylenephosphonic) acid.
EFFECT: improved method of synthesis.
16 cl, 1 tbl, 19 ex
