FIELD: chemical technology.
SUBSTANCE: invention relates to the improved method for preparing bis-(1-hydroxyethane-1,1-diphosphonate(1-)) zinc (II). Method involves interaction of zinc-containing reagent and 1-hydroxyethane-1,1-diphosphonic acid in a solvent medium, crystallization of the end product from solution, separation of deposit from solution and drying the deposit. Method involves using water-soluble zinc (II) salt with anion of strong acid as a zinc-containing reagent and preparing the solution with the concentration of zinc (II) salt from 0.2 to 2.2 mole/l and the concentration of 1-hydroxyethane-1,1-diphosphonic acid from 0.4 to 5.0 mole/l. The end product prepared by proposed method can be used in preparing phosphonate electrolytes for galvanic zinc-plating, for preparing zinc-phosphate inhibitors of steel corrosion, as trace supplement to vitamin preparations and fodders for animals, as a zinc microfertilizer in agriculture and for preparing other compounds of zinc (II). Invention provides enhancing purity and uniformity of the end product, increasing its yield, improved technological effectiveness of process, utilizing toxic waste in galvanic manufacturing.
EFFECT: improved preparing method.
8 cl, 1 tbl, 6 ex
