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VerTane
Organic Chelating Agent

VerTane inhibited organic chelating agent used to control the concentration of metal ions in aqueous systems while protecting the underlying metal from corrosion.

The reduction of water hardness in descaling applications and the dissolution of scale in cooling water and boilers both rely on VerTane and related complexing agents to bind Ca2+ and Mg2+ ions as well as other metal ions.
Once bound to Vertane, these metal centers tend not to form precipitates or to interfere with the action of the detergents. For similar reasons, many cleaning solutions often contain Verane.

Type        Chemical Nature
VerTane        In solid form
VerTane (B-A-T Liquid)        Aqueous solution
VerTane (BVT)        Aqueous solution with added triethanolamine (TEA)

Applications
   Water Treatment
   Cleaning Heat Exchangers
   Electroplating
   Laundry Detergents
   Industrial Cleaners
   Soap Manufacturing
   Textile Processing
   Leather
   Pulp & Paper
   Radioactive Decontamination
   Polymerization
   Printing Inks

Advantages
VerTane is very effective for treating water to prevent scale and deposits of calcium carbonate, calcium sulphate and calcium phosphate from forming in boilers, evaporators, reverse osmosis membranes, heat exchangers and filters, etc.
VerTane can also be used to remove scale.
VerTane every effective for cleaning equipment of this type, because it is less corrosive than other cleaners. It has the advantage over acids because no potentially disruptive CO2 is formed when calcium carbonate is dissolved.

Cleaning Heat Exchangers
VerTane (B-A-T Liquid) type is particularly effective for removing magnetite scale.
Magnetite scale can be formed in the heat exchangers of power stations or in heating circuits if air is allowed to enter. VerTane (B-A-T Liquid) causes little corrosion to alloyed and unalloyed steels, and it is much superior to the sodium salt in this respect. Scale can be removed most efficiently at elevated temperatures.
Magnetite is formed from a mixture of Fe(II) and Fe(III) ions. Fe(II) forms complexes at a pH of approx. 9, but the pH needs to be in the acid range (pH < 5) for Fe(III) to be complexed. Adding hydrazine to the cleaning solution can prevent Fe(III) ions from being formed and can reduce these to Fe(II). This makes it easier to remove magnetite scale in the alkaline pH range, and prevents iron(III) hydroxide sludge from being formed. It is recommended to remove magnetite scale at a pH of approximately 9.
The rate at which the scale dissolves depends to a large extent on the thickness of the scale, its composition and morphology, and the flow of liquid through the equipment to be descaled. Practical experience has shown that the rate at which scale is removed can be speeded up by increasing the concentration of Vertane (B-A-T Liquid), the temperature and the rate of flow through the system.

Electroplating
VerTane (BVT) can be used to stabilise phosphonates in neutral and alkaline derusting and descaling baths.
VerTane (BVT) also prevents lime soaps from precipitating, which prolongs the working life of baths.
VerTane (BVT) can be added to alkaline degreasing baths that contain polyphosphates to reduce the hydrolysis of polyphosphates in the presence of metal ions, especially alkaline earth and heavy metal ions. Adding VerTane (BVT) to degreasing baths helps to inhibit the formation of orthophosphates. This reduces the danger of the phosphates precipitating, which impairs the complexing power of the bath and its ability to disperse soil and emulsify grease. VerTane (BVT) boosts the detergency of degreasing baths and prevents non-ferrous metals from tarnishing.

Laundry Detergents
VerTane can be used to stabilize perborate and percarbonate in powder detergents. Small amounts of complexing agents, as little as 0.5 – 1.0 % expressed as the active substance, can be added to prevent traces of heavy metals from catalyzing the decomposition of hydrogen peroxide and other types of bleach. These heavy metals, which mainly consist of iron, copper and manganese, originate from the walls of pipes, the soil contained in the laundry and the other ingredients of the detergent. Peroxide bleach can break down fluorescent whitening agents, cause coloured laundry to change shade and damage fabrics in the presence of heavy metal ions. VerTane protects fabrics by sequestering heavy metals.
VerTane plays an active role in removing many types of soil and boost the detergency of laundry detergents.

Industrial Cleaners
VerTane can be employed in all types of cleaner and degreaser formulations for industrial and institutional applications. VerTane prevents hardness ions and heavy metal ions from precipitating. Inorganic solids of this type can form scale and deposits in tanks, pipes, and nozzles and on hard surfaces.
VerTane boosts the performance of the surfactants contained in cleaner formulations and ensure that their performance remains undiminished during the whole cleaning process.
Scale that consists of calcium carbonate, calcium phosphate or calcium oxalate can be formed in pipes and heat exchangers at high temperatures in various industrial processes. VerTane can be added to cleaner formulations remove this type of scale. The rate at which the scale dissolves can be increased by increasing the cleaning temperature.
Turbidity and precipitation is often a problem when highly concentrated cleaners such as floor cleaners, metal cleaners and bottle-washing formulations are prepared with hard water. This problem can be overcome in most cases by adding VerTane.
The excellent solubility of VerTane enables it to be used to replace some or all of the phosphates contained in many formulations. This prevents highly concentrated liquid formulations from precipitating and demixing at low temperatures.
VerTane can be used to protect lubricants, cleaners and polishes in emulsion form from the damaging effects of hard water and salts of polyvalent metal ions.

Soap Manufacture
VerTane can be added to curd soap, toilet soap and shaving soap at rates of between 0.3% and 2% to prevent it becoming rancid and discoloured.
The heavy metals responsible for this are usually contained in the tallow, fatty acids and other raw materials, but soap can also be contaminated with metallic particles during drying, milling, plodding or stamping.

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