CRYSTALLINE FORM OF TETRASODIUM NITRILOTRISMETHYLENE PHOSPHONATE ZINCATE AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2014 - IPC C07F9/38 C23F11/167 

FIELD: chemistry.

SUBSTANCE: crystalline form of a tridecahydrate of tetrasodium nitrilotrismethylene phosphonate zincate relates to a triclinic isometric system, has a spatial symmetry group $$P\overline{1}$$ and cell dimensions of the crystal lattice a=1.12208±0.00002 nm, b=1.12666±0.00003 nm, c=1.23286±0.00003 nm, angles between edges of the crystal lattice α=108.455±0.002°, β=97.168±0.002° and γ=117.103±0,002°. The disclosed method includes mixing, in an aqueous solution, nitrilotrimethylene phosphonic acid, zinc oxide and sodium hydroxide in the following ratio, pts.wt: nitrilotrimethylene phosphonic acid - 24…26, zinc oxide - 13…14, sodium hydroxide - 27…30, stirring said mixture while heating, filtering and evaporating the obtained filtrate.

EFFECT: provided is a novel stable crystalline form of a tridecahydrate of tetrasodium nitrilotrismethylene phosphonate zincate, which is suitable as an effective corrosion inhibitor which does not cake, does not form dust and easily dissolves in water, and a novel efficient method for production thereof.

6 cl, 4 dwg, 6 tbl