Which is more suitable for use as a scale inhibitor, PBTCA or EDTMPS?

PBTCA (o-phenyltricarboxylic acid) and EDTMPS (ethylenediamine tetramethylenephosphonic acid) are both commonly used scale inhibitors for scale inhibition and chelation in the field of water treatment.

PBTCA mainly has the following characteristics:

Highly efficient scale inhibition performance: PBTCA can complex with calcium, magnesium and other metal ions to form insoluble precipitates to prevent the deposition and scaling of hard water salts in water.

Better heat resistance: PBTCA can maintain good scale inhibition performance even under high temperature, suitable for scale inhibition application under high temperature environment.

Stronger adaptability to changes in water quality: PBTCA has better adaptability to changes in water hardness, pH value, etc., and can play a stable scale inhibition effect under different water conditions.

And EDTMPS mainly has the following characteristics:

Strong chelating performance: EDTMPS has good metal chelating ability, it can complex with many kinds of metal ions and form stable complexes, effectively blocking the precipitation and scaling of metal ions.

Excellent scale inhibition effect on calcium and magnesium ions in water: EDTMPS is especially suitable for controlling the scaling of calcium and magnesium ions in water, and can effectively prevent the generation of limestone and chalk.

Better tolerance to impurities: EDTMPS has less influence on the interference of organic and inorganic impurities in water and is more stable.

In summary, PBTCA and EDTMPS are both effective scale inhibitors, and the choice of which one to use is more suitable needs to be decided according to specific application requirements, water quality and environmental conditions. It is recommended to test and evaluate according to the specific situation in the actual application, or consult relevant professionals for guidance.