Posted by ATMP (Aminotrimethylenephosphonic Acid) and HPAA (Hydroxyphosphonopropionic Acid) are common scale inhibitors widely used in industrial water treatment systems. The choice of which scale inhibitor is more effective depends on the specific application scenario and water quality conditions. Below are the characteristics and comparison of the two:
ATMP (Aminotrimethylenephosphonic acid)
Characteristics
Chemical structure: Contains amino and phosphate groups with good chelating ability.
Resistance to carbonate and sulphate scales: Excellent in stopping the formation of precipitates such as calcium carbonate and calcium sulphate.
High Temperature and High pH Resistance: Stable in high temperature and high pH environments, suitable for thermal equipment and alkaline water systems.
Corrosion Inhibition: Also has a certain corrosion inhibition effect.
Applications
Suitable for cooling towers, boilers, water treatment systems, petrochemicals, etc.
HPAA (Hydroxyphosphonopropionic Acid)
Characteristics
Chemical structure: contains hydroxyl and phosphonic acid groups, with good chelating and dispersing ability.
Anti-phosphate scale: It has good scale inhibition effect on phosphate scale.
Low toxicity: environmentally friendly, good biodegradability.
Multifunctionality: It has the triple functions of scale inhibition, corrosion inhibition and dispersion.
APPLICATIONS
Suitable for circulating cooling water system, reverse osmosis system, oil field water treatment, etc.
Comparison and selection
Scale inhibition effect
Water type: ATMP provides better control of carbonate and sulphate scales, while HPAA performs better with phosphate scales.
System conditions: ATMP is more stable and effective than HPAA at high temperatures and high pH.
Environmental Impact
Toxicity and Environmental Protection: HPAA’s biodegradability and low toxicity give it an advantage in environmentally demanding applications.
Comprehensive Performance
Multifunctionality: HPAA has a wider range of functions, with good corrosion inhibition and dispersion properties in addition to scale inhibition.
Cost-effectiveness: Depending on the specific application requirements and water quality conditions, choose a more cost-effective product.
Summarise
ATMP: Suitable for high temperature, high pH, carbonate and sulphate based water treatment systems, especially in thermal equipment.
HPAA: Suitable for applications requiring low toxicity, high environmental friendliness, versatility and better control of phosphate scale.
The final choice depends on specific water conditions, system operating parameters and environmental requirements. In practical applications, experiments and tests may be required to determine the optimum scale inhibitor and dosage to be used.