In industrial circulating cooling water systems, PAPEMP can effectively prevent the formation of scale. Scale is mainly composed of calcium carbonate, calcium sulfate and other substances. PAPEMP can chelate with calcium ions and other scale - forming ions, so that these ions are kept in a dissolved state and do not precipitate to form scale, thereby improving the heat transfer efficiency of the heat exchanger and reducing energy consumption.
It also has a certain corrosion - inhibiting effect. By adsorbing on the metal surface, it forms a protective film to isolate the metal from corrosive substances such as oxygen and water in the water, thereby slowing down the corrosion rate of the metal.

The main uses of polyacrylic acid (PAA) in environmental protection include:

1. Wastewater treatment: Polyacrylic acid is widely used in wastewater treatment due to its adsorption, desorption and precipitation properties. It can adsorb heavy metal ions, organic matter and pigments and other pollutants in wastewater, and at the same time form a precipitation in wastewater, separating suspended solids, and playing a role in purifying the water body.

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is an organophosphate compound widely used in industrial, agricultural and medical applications. Its main advantages and disadvantages are listed below:

When HEDP (Hydroxyethylidene Diphosphonic Acid) is mixed with other chemicals, the following aspects need to be observed to ensure its chemical stability:
I. Dosage control
The dosage of HEDP should be adjusted according to the water quality (e.g., hardness, pH) and the specific application environment to avoid overdose or underdose. Overdosage may lead to side effects such as scaling, corrosion or affecting other chemical reactions. By precisely controlling the dosage, you can ensure that HEDP works optimally in the mixed system while avoiding unnecessary chemical changes.
Second, compatibility check
HEDP should be compatible with other water treatment chemicals (e.g. biocides, disinfectants, flocculants, etc.). Before use, it is recommended to confirm the compatibility of different chemicals through small-scale tests. If there is a compatibility problem, it may affect the effectiveness or even produce adverse reactions. Compatibility check is an important step to ensure the chemical stability of HEDP.
Third, pH control
The effect of HEDP is usually closely related to the pH value of water. When adding HEDP, the pH of the water needs to be monitored and adjusted to ensure its optimal performance. Certain scale inhibitors work best in a specific pH range, so dosing HEDP in the appropriate pH range according to its characteristics helps maintain its chemical stability.
IV. Temperature control
Some scale inhibitors may degrade or fail at high temperatures, although HEDP can remain stable at high temperatures (below 250℃), but in practical applications, the temperature of dosing still needs to be controlled according to the process conditions. Avoid unnecessary chemical changes of HEDP caused by too high temperature.
V. Storage conditions
HEDP should also maintain its chemical stability during storage. Special attention needs to be paid to storage conditions, such as avoiding direct sunlight, high temperature or moisture. HEDP should be placed in a dry, cool place and avoid mixing with other chemicals to minimize the risk of decomposition or deterioration.
VI. Attention to protection and monitoring
Safety protection: HEDP sometimes contains irritating or corrosive components, so it is necessary to wear appropriate protective equipment, such as gloves, glasses, protective clothing, etc. when operating. Avoid contact between HEDP and eyes and skin. Once splashed on the body, flush with plenty of water immediately.
* **Periodic inspection**: Before and after the injection of HEDP should be regularly checked the water quality, especially the water hardness, dissolved oxygen, pH value and other indicators. This helps to detect changes in water quality in time to ensure that HEDP maximizes its effect, and also helps to monitor the chemical stability of HEDP in the mixed system.

HEDP (Hydroxyethylidene Diphosphonic Acid) is a highly efficient organic phosphonic acid scale and corrosion inhibitor with multiple excellent properties. It can form stable complexes with iron, copper, zinc and other metal ions, effectively dissolving the oxides on the metal surface, thus protecting the metal from corrosion. Even under the condition of up to 250℃, HEDP can still play an excellent corrosion and scale inhibition role, and its stability is still excellent in the high pH environment, not easy to hydrolyze, and not easy to decompose under general light and heat conditions.

HPMA is a modified cellulose derivative commonly used in paints, coatings, adhesives, textile and paper industries. It is a water-soluble, highly viscous polymer compound with good thickening, emulsifying, suspending and film-forming properties. Its working principle is usually related to its chemical structure and physical properties. Specifically, the working principle of HPMA can be understood from the following aspects:

EDTMPS (Ethylene Diamine Tetra Methylene Phosphonic Acid Sodium Salt) is mainly used in the following industrial fields, especially related to water treatment, corrosion prevention and cleaning:

1. Water treatment

    Anti-scaling and dispersing agent: EDTMPS is widely used in the field of water treatment, especially to prevent scale formation. Metal ions (e.g. calcium, magnesium, etc.) contained in water react with carbonate and sulfate to form precipitates, which tend to accumulate on equipment and lead to scaling.EDTMPS prevents metal ions from precipitating by chelating with them through its phosphoric acid group, inhibiting scale formation and keeping water clean.
    Boiler water treatment: scale often accumulates in boiler systems, affecting heat exchange efficiency and even damaging the boiler. edtmps can inhibit scale deposition in boiler water, preventing it from damaging the equipment.
    Cooling Water Systems: In cooling water circulation systems, EDTMPS prevents scale and rust from forming on metal surfaces by binding with metal ions in the water, keeping the system operating efficiently.
    Membrane protection and cleaning: In water treatment membrane systems such as reverse osmosis membranes, EDTMPS can effectively disperse particles in the water and prevent them from being deposited on the membrane surface, protecting the long-term service life of the membrane.

EDTMPS is a kind of common water treatment chemicals, as the manufacturer of EDTMPS Kerry Chemical, let's introduce this product:

EDTMPS performance:
1. cathodic type corrosion inhibitor: EDTMPS belongs to the cathodic type corrosion inhibitor, compared with inorganic polyphosphates, its corrosion inhibition rate is 3 to 5 times higher.
2. water solubility: good water solubility, non-toxic and non-polluting when miscible with water. 3. chemical stability and temperature resistance.
3. chemical stability and temperature resistance: good chemical stability, good temperature resistance, can still play an effective scale inhibition effect under the condition of up to 200℃.
4. chelating ability: it can dissociate into 8 positive and negative ions in aqueous solution, chelate with several metal ions, form several monomer structure macromolecule reticulation complexes, loosely dispersed in the water, so that the normal crystallization of calcium scale is destroyed.
5. It has good scale inhibition effect on calcium sulfate and barium sulfate scale.

I. Properties and Uses
EDTMPS is a nitrogen-containing organic polyphosphonic acid, which is a cathodic-type corrosion inhibitor with a corrosion inhibition rate 3 to 5 times higher than that of inorganic polyphosphates. This compound is miscible with water, is chemically stable and does not produce toxicity or contaminants. It also has good chemical stability and temperature resistance, and is still effective in preventing scale formation at 200°C. EDTMPS can dissociate into 8 positive and negative ions in aqueous solution, so it can form chelating compounds with a variety of metal ions to form a macromolecular reticulation complex of multiple monomer structures, which are loosely dispersed in the water, disrupting the normal crystallization process of calcium scales.EDTMPS is effective against EDTMPS has good scale inhibition effect on calcium sulfate and barium sulfate scale.
EDTMPS is widely used as corrosion and scale inhibitor for circulating water and boiler water, cyanide-free electroplating complexing agent, chelating agent and oxygen bleaching stabilizer in textile printing and dyeing industry.

EDTMPS, or ethylenediaminetetramethylenephosphonic acid sodium salt, is a multifunctional organic phosphonate. Its chemical properties are mainly manifested in the following aspects:

Solubility: EDTMPS has good solubility in water, which enables it to be dispersed rapidly and uniformly in water during water treatment, so that it can play its role effectively.