In the complex world of industrial water management, scale and corrosion are the silent enemies of efficiency. They creep into pipelines, clog heat exchangers, and reduce the lifespan of expensive machinery. For decades, the chemical industry has relied on organophosphonates to combat these issues, and at the forefront of this technology stands Shandong Kerui Chemicals with its flagship products: HEDP and DTPMPA.
Kerui’s HEDP (Hydroxyethylidene Diphosphonic Acid) is considered the classic workhorse of the industry. Its molecular structure, containing bisphosphonic acid groups and hydroxyl groups, allows it to form exceptionally stable six-membered ring chelates with metal ions such as iron, copper, zinc, and calcium . What makes HEDP indispensable is its remarkable thermal stability; it remains effective even at temperatures as high as 250°C. This resilience, combined with resistance to acid, alkali, and chlorine oxidation, makes it the ideal candidate for circulating cooling water systems, boiler water treatment, and even metal cleaning applications .
However, when the water conditions become more aggressive—specifically in high-alkalinity and high-calcium environments—Kerui offers DTPMPA (Diethylene Triamine Penta Methylene Phosphonic Acid). This product is a high-performance chelating agent characterized by its multiple phosphonic acid groups, which grant it an exceptional calcium tolerance . In high-temperature, high-hardness water, DTPMPA outperforms standard organic phosphorus compounds, effectively inhibiting the formation of calcium carbonate, calcium sulfate, and barium sulfate scales . It is particularly valued in reverse osmosis systems, oilfield injection water, and alkaline circulating water where pH adjustment is not feasible .
Kerui Chemical has cemented its reputation not just by offering these products but by ensuring they meet rigorous quality standards. Produced in a state-of-the-art facility with an annual capacity of 280,000 tons of various chemical agents, Kerui ensures that the industrial-grade HEDP and DTPMPA (≥50% active content) maintain high purity and consistency . The company provides comprehensive technical support, including sample testing and customized water treatment formulation development. With solid stock availability and custom compounding capabilities, Kerui Chemical positions itself as a reliable partner for industries worldwide looking to maximize efficiency and minimize operational downtime.