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Phosphino Carboxylic Acid

Properties:

Phosphino carboxylic acid (PCA) associates characteristics of phosphonates as well as polyacrylates. The function is to provide a special equilibrium of limit inhibition and also dispersancy. The PCA has good tolerance to chlorine. And it is also compatible with a lot of microbiological control agents.

The PCA has excellent dispersion performance for the scale of calcium carbonate as well as calcium phosphate in circulating cool water system. The reason is via the introduction of a phosphonic group right into a carboxylic group. In addition, PCA has also good scale inhibition for barium sulfate, strontium sulfate as well as silica scale.

One more thing to note, phosphino carboxylic acid (PCA) can not be affected by chlorine or other oxidizing biocides in standard.

Phosphino Carboxylic Acid

 

Mechanism of Action:

Phosphino carboxylic acid inhibits scale buildup on surfaces through at least three mechanisms. (More details, click here.)

  1. Solubility enhancement or threshold effect, which reduces precipitation of low solubility inorganic salts.
  2. Crystal modification, which deforms the growing organic salt crystals to give small, irregular, readily fractured crystals that do not adhere well to surfaces.
  3. Dispersing activity, which prevents precipitated crystals or other inorganic particles from agglomerating and depositing on surfaces. Low molecular weight polymers are widely used to inhibit scaling in industrial water treatment.

Specifications:

ItemIndex
AppearanceColorless or light yellow liquid
Solid content, %50.0 Min.
Total phosphor (as PO43-), %0.5 Min.
Density (20℃), g/cm31.20-1.30
pH (1% water solution)3.0-5.0

Application:

Phosphino carboxylic acid has advantages in a wide range of water quality, chemical stability, strong chlorine tolerance, etc. Engineers use it as scale and corrosion inhibitor in circulating cool water system. And also found in the oilfield refill water system.

ChemicalsApplication AreaApplication UseFeatures and Benefits
Phosphonocarboxylic Acid (POCA)Cooling WaterCalcium carbonate and calcium phosphate scale control.

Effective particulate dispersion.
Multifunctional, phosphonate and polymer performance on the same molecule.

Simplifies formulations.

Improved scale control in comparison with standard dispersant type polymers.

Effective panticulate dispersion (silt, iron oxide).

Maintains performance in halogenated and high calcium water.
Sulphonated Phosphino Polycarboxylic Acid Polymer (PCA-S)Cooling WaterStabilized phosphate and zinc based cooling water programs.Control calcium phosphate and zinc deposits.

Effective control of calcium phosphate to maintain heat exchange surfaces.

Effective panticulate dispersion (silt, iron oxide).
Phosphinocarboxylic Acid Polymer (PCA)
BoilersSludge dispersantFDA approved, can be used in applications where steam may contact food.

Cost effective savings by removing the need for more expensive copolymers.

Thermally and hydrolytically stable.

Provides extended performance under boiler conditions at pressure up to 1000 psig.
Pulp & PaperDe-inking dispersant
Outperforms polyacrylates. Excellent performance under pulp and paper conditions.
Paper machine depositEffective against barium sulphate and calcium oxalate.

Multifunctional scale control and dispersancy in paper machines.

Usage:

When used alone, the dosage of 5-20 mg/L is preferred. It can also be used together with organophosphines, copolymer, a zinc salt or BTA.

Package and Storage:

200L plastic drum, IBC (1000L), customers’ requirements. Storage for ten months in a shady room and dry place.

Synonyms:

71050-62-9, 23636-66-0, CTK1A2745, DTXSID00559205, Phosphoranecarboxylicacid (8CI,9CI), ZINC113998343