ORGANOPHOSPHONATE COMPOSITION FOR STABILIZATION WATER TREATMENT IN WATER USE SYSTEMS Russian patent published in 2021 - IPC C23F11/167 C02F5/14 

FIELD: water treatment.

SUBSTANCE: invention relates to compositions used for stabilization water treatment in order to inhibit scale deposits and corrosion in water use systems and directly relates to a composition based on phosphorus-containing organic complexing compounds, which can be used for stabilizing water treatment in closed systems of water circulation cycles of industrial and energy enterprises and enterprises utilities. The composition contains nitrilotrimethylphosphonic acid (NTF) and methyliminodimethylphosphonic acid (MIDP), and also contains diaminopropanol tetramethylphosphonic acid (DPP) and magnesium oxide (MgO) at a molar ratio of NTF: MIDP: DPP equal to (1÷3):1:0.5 and the molar ratio of DPF: MgO which is equal to (1÷2): 1. This composition is obtained by introducing diaminopropanol tetramethylphosphonic acid (DPP) and magnesium oxide into an aqueous solution in an amount corresponding to the DPP: MgO molar ratio equal to (1÷2): 1. The resulting mixture is stirred until the precipitate is dissolved. The solution is neutralized with an aqueous solution of sodium hydroxide to a pH of 5.5-5.7 at a temperature not exceeding 40 °C and adding NTF and MIDP to the reaction mass in amounts corresponding to the molar ratio of NTF: MIDP: DPP equal to (1÷3):1:0.5.

EFFECT: low toxicity of the composition, high efficiency at low concentrations.

2 cl, 3 ex