Antifoam/Defoamer (Organic and Silicone based)

All Chemical Defoamer or Antifoam is a low viscosity product which facilitates the rapid spread of our Defoamer on foamy surfaces. It has affinity to the air-liquid surface interface where it destabilizes the foam surface tension. Silicone-based defoamers are polymers with silicone backbones. These are delivered as an oil or a water based emulsion. The silicone compound consists of an hydrophobic silica dispersed in a silicone oil. The active ingredient of the antifoams is a silicone based polymer that has a molecular weight range of 3,200 to 16,500 Da. The silicone-type antifoams are suspensions and must be agitated before a sample is taken from the container to insure representative sampling. Long-term storage of diluted material may diminish this antimicrobial effect and additional preservative may be required. Silicone based defoamers are also suitable in non-aqueous foaming systems like crude oil and oil refining. For very demanding applications fluoro-silicones may be suitable. Silicone antifoams, which have lower surface tension as compared to organic antifoams, are effective typically at much lower dosage rates than organics, leading to significantly lower cost-in-use. Silicone antifoams tend to be much more persistent (longer-lasting) than organic antifoams. Silicone antifoams, insoluble in most systems, tend to be less reactive in the foaming medium, leading to fewer compatibility problems.

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  • Foaming System

Calcite

Calcite is mainly used in water treatment and swimming pools to control both internal corrosion and the deposition of scale. It is used as a neutralizing agent, filler, antacid and Source of lime.

The Langelier Index(LSI)is an approximate indicator of the degree of saturation of water with calcium carbonate. The Langelier Index is one of several tools used by water operators for stabilizing water to control both internal corrosion and the deposition of scale. Water supply operators can optimize their water supply systems and identify leakage potentials with the Langelier Index. It is calculated using the pH, alkalinity, calcium concentration, total dissolved solids, and water temperature of the water sample.

If the Langelier Index is negative, then the water is under saturated with calcium carbonate and will tend to be corrosive in the distribution system.

If the Langelier Index is positive, then the water is over saturated with calcium carbonate and will tend to deposit calcium carbonate forming scales in the distribution system.

If Langelier Index is close to zero, then the water is just saturated with calcium carbonate and will neither be strongly corrosive or scale forming.

Experience has shown that Langelier Index in the range of -1 to +1 has a relatively low corrosion impact on metallic components of the distribution system. Langelier Index values outside this range may result in laundry stains or leaks.

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  • Calcite