CORROSION AND SCALE-FORMATION INHIBITOR FOR WATER TREATMENT OF HEATING SYSTEMS AND OTHER HEATING SYSTEMS Russian patent published in 2019 - IPC C23F11/167 C23F14/02 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to corrosion inhibitors and scaling for water treatment of heating systems, which are reagents based on phosphorus-containing organic compounds, and is intended for use primarily in heat engineering. Inhibitor contains, wt %: phosphonobutane tricarboxylic acid 0.5–25.0; aminotrimethylenephosphonic acid 0.5–10.0; oxyethylene diphosphonic acid 0.5–15.0, 2-methylprop-2-enoic acid polymer 0.5–10.0; methyl-2-methylprop-2-enoate 0.5–10.0; copolymer of 2-methylprop-2-enoic acid 0.1–8.0; 2-methylprop-2-enamide 0.1–8.0; sodium pyrosulphate 0.5–25.0; sodium hydroxide 0.5–5.0; water – balance up to 100 %.

EFFECT: technical result is creation of chemical reagent of multifunctional action with combination of components, providing efficiency of inhibition of oxygen and electrochemical corrosion of carbon steel, as well as scale formation with observance of all sanitary and epidemiological and process standards for water in heating systems with closed and open water breakdown.

1 cl, 4 tbl