| 摘要 |
FIELD: chemistry.SUBSTANCE: crystalline form of a tridecahydrate of tetrasodium nitrilotrismethylene phosphonate zincate relates to a triclinic isometric system, has a spatial symmetry groupand 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 ?=108.455±0.002°, ?=97.168±0.002° and ?=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 |
