Boiler cleaning agent

[0030] Example 1

[0031] Weigh 0.11 mol of o-phenylenediamine and 0.05 mol of sebacic acid, grind thoroughly in a mortar to make them evenly mixed, and transfer to a three-necked flask. Add 20 mL of commercially available hydrochloric acid, 5 mL of commercially available phosphoric acid, and 75 mL of deionized water to form a mixed acid, vent through nitrogen, and heat to reflux with mechanical stirring for reaction. TLC tracked and monitored the reaction until the end of the reaction, about 10 hours, poured into a 250mL beaker, left to cool, and adjusted pH=7 with concentrated ammonia. Let it stand overnight at 4°C, filter and dry it with suction, and recrystallize the obtained crude product with methanol/water to obtain a pure product.

[0032] Example 2

[0033] Dissolve 4g of the disodium salt of EDTA in 100g of water, add 1g of polyoxyethylene octylphenol ether with a degree of polymerization of 10, 2g of polyacrylic acid, 1g of cetyldimethylbenzylammonium chloride, 8g of citric acid, ω , Ω'-bis(benzimidazol-2-yl)alkane 2.5g, hydrazine hydrate 2.5g, hydrogen peroxide 1g and ethanol 6g, stirred for 40 minutes to obtain a cleaning agent.