Some Things You May Not Know About HEDP

What is HEDP?

HEDPA is usually called HEDP, CAS NO. is 2809-21-4, its molecular formula is C2H8O7P2, and its molecular weight is 206.02

HEDPA is an organic phosphate scale and corrosion inhibitor, mainly used to prevent and control scale and corrosion problems. It can form stable complexes with metal ions, thereby inhibiting scale formation and reducing metal corrosion.

What is HEDP used for?

In addition, HEDP also has good synthesis stability and thermal stability, can be used in a wide temperature range, and is widely used in industrial and civil water treatment fields. One of the functions and uses of HEDP is in the field of water treatment. Since water often contains various substances that cause scale and corrosion, it is necessary to add scale and corrosion inhibitors to prevent damage to equipment and pipelines.

Scale inhibition

HEDP can form complexes with iron, calcium, magnesium, zinc and other ions in water, which can effectively inhibit the formation of scale, thereby reducing the maintenance and cleaning times of water treatment equipment, especially some common scale substances such as calcium carbonate and barium sulfate .

In addition, HEDP has a high chelating ability and can combine with metal ions in these substances to form insoluble complexes, thereby preventing them from crystallization and deposition on the surface of pipelines and equipment.

In industrial production and water supply systems, HEDP can significantly reduce the frequency of equipment cleaning and maintenance, and reduce energy consumption and production costs.

Corrosion inhibition

After HEDP forms a complex with metal ions, it can effectively prevent and prolong metal oxidation and corrosion in water treatment equipment, thereby prolonging the service life of water treatment equipment and cleaning and maintenance times, thereby reducing the company's operating costs.

Cleaning effect

HEDP is not easily hydrolyzed, and can prevent scale deposition in the cooling water circulation system, keep the cleanliness of pipelines and equipment, and maintain efficient and normal operation.

Stable performance

HEDP can form stable complexes with a variety of metal ions, and can dissolve oxides on the metal surface. It is not easily hydrolyzed at high pH values, has stable performance, and still has good corrosion and scale inhibition in a high-temperature environment of 250 ° C. Therefore, HEDP is suitable for different water treatment conditions and has good stability.

Other functions

HEDP can also exist in solid form. The pure product is white crystal, which is a high-purity product and can be used in severe winter regions. It is not only soluble in methanol and ethanol, but also more soluble in water. Compared with HEDP liquid, it is easier to transport and use.

In addition, HEDP can also be used as a complexing agent in some chemical reactions. It can coordinate with certain metal cations to form stable complexes, which are used in the preparation of catalysts and organic synthesis. This coordination property makes HEDP have important application potential in certain chemical processes and production processes.

HEDP can be used as metal and non-metal cleaning agent in textile industry, peroxide stabilizer and color fixing agent in bleaching and dyeing industry, complexing agent in cyanide-free electroplating industry, and radioactive element carrier in pharmaceutical industry.

All in all, HEDP is a multi-functional organic phosphate compound, which has multiple functions such as scale inhibition, corrosion inhibition and coordination, and is widely used in industrial circulating cooling water systems such as electric power, chemical industry, metallurgy, and chemical fertilizers, as well as medium and low pressure boilers, Scale and corrosion inhibition for oilfield water injection and oil pipelines.

It plays an important role in the fields of water treatment, industrial production and metal processing, which can increase the service life of equipment, reduce maintenance and cleaning frequency, and reduce production costs. With the continuous improvement of water quality and equipment protection requirements, the application prospect of HEDP will be broader