Application of DTPMP and its sodium salts in circulating cooling water

（1） Development background
In the fields of cooling water treatment and boiler water treatment, the daand for scale inhibitors and chelating agents is constantly increasing with the rapid development of industrialization. Water treatment technology has been continuously improved and enhanced, which makes DTPMPA and its sodium salts widely used as environmentally friendly and efficient scale inhibitors and chelating agents both domestically and internationally.
DTPMPA is an abbreviation for diethylenetriamine pentamethylene phosphonic acid, also known as DETPMP, diethylenetriamine pentamethylene phosphonic acid. DTPMPA and its sodium salts can effectively prevent the formation of scale, improve water utilization efficiency and equipment operation efficiency; In addition, it also has advantages such as environmental protection, non-toxic, and harmless, which meets modern environmental protection requiraents.
（2） Function and application areas
1. DTPMPA and its sodium salt DTPMPNa5 can be used as scale and corrosion inhibitors for circulating cooling water and boiler water in water treatment, and can also be used as scale and corrosion inhibitors for oilfield water injection, cooling water, and boiler water with high barium carbonate content; DTPMPA can be used as an oxygen bleaching stabilizer, chelating agent for textile printing and dyeing, dispersant for pigments, trace elaent carrier for fertilizers, and concrete additive. In addition, it has also been widely used in papermaking, electroplating, metal pickling, and cosmetics.
2. DTPMP · Nax is composed of different forms of sodium salts of DTPMP. It and DTPMP • Na7 can both be used as scale inhibitors, high-efficiency chelating agents, and excellent BaSO4 scale inhibitors, widely used in cooling water treatment, stabilizer for peroxide bleaching, washing aids, oilfield scale inhibitors, and other fields.
The working principle of DTPMPA and its sodium salts is mainly through complexation, nucleation inhibition, and ion exchange, which combine with metal ions in water to form stable complexes, thereby preventing metal ions from precipitating and scaling in water, and improving water utilization and equipment operation efficiency.
（3） Summary
DTPMPA, with its excellent scale inhibition performance and chelation ability, can effectively prevent the precipitation of metal ions such as calcium and magnesium ions and the formation of scale, and is widely used in water treatment.