Detailed Summary About The Generally Used Various Chemicals in Circulating Cooling Waters

Generally there are many kinds of organic phosphonic acids, however in the molecular structure they have a phosphonic acid group straightly attached to a carbon atom. And the molecule may also contain groups such as -OH, -CH2 or even -COOH.

For that reason, the amount of phosphonic acid groups included within the molecule is decided. The organic phosphoric acid might be classed as in to a diphosphonic acid, a triphosphonic acid, a tetraphosphonic acid, a pentaphosphonic acid and the like. According to the kinds of molecular structure, the actual organic phosphoric acid can be further divided into a methylidene phosphonate category, a homocarbodiphosphonic acid class, a hydroxy acid phosphonic acid class, and also other atomic phosphonic acid type.

market trends in cooling water treatment

Organic phosphoric acid is a fresh product developed in the late 1960’s. Nevertheless, it was widely applied in circulating cooling the water treatment solution in the 1970s. It’s because it has got the benefits below.

First of all, each one has a C-P bond in their own molecular structure, which bond is much stronger than the P-O-P bond in polyphosphate. So, it has excellent chemical stability. It isn’t simply hydrolyzed, and is resistant to high temperature. While in the use, it will not result in orthophosphoric acid to become overproduced as a result of hydrolysis.

Second of all, it possesses an important effect much like polyphosphate. It’s only a few mg/L of organic phosphonic acid which could stop the precipitation of a lot of hundred mg/L of calcium carbonate.

When it comes to actual apply, it has been discovered that the use of an organic phosphonic acid in combination with a polyphosphate is preferable to any existing individual types. In addition to polyphosphate, it as well features a superior synergistic effect with a number of agents.

For this reason, during workable apply, users generally choose the compound method with the greatest synergy.

In addition to these positive aspects, the actual organic phosphonic acid also has very good corrosion inhibition properties with high dosage. And it is a non-toxic as well as particularly low-toxic chemical. Because of this, there’ no requirement to think about polluting the environment in the time of application.

Typically used organic phosphonic acid

There are actually lots of types of organic phosphonic acid, nevertheless the next commonly apply agent within circulating cooling water are the following.

1. HEDP Acid

HEDP 60 can be an organic phosphonic acid of the exact same carbon diphosphonic acid kind. Its molecular structure does not contain N. Its chemical title is hydroxyethylidene diphosphonic acid. HEDP could form steady complexes with various metal ions for example iron, copper and zinc, and can dissolve oxides on metal surfaces.


This chemical name is ethylenediamine tetramethylene phosphonate. It can chelate with a plurality of metal ions to form a plurality of monomer structure macromolecular network complexes, which are usually freely dispersed in water to eliminate the calcium scale crystal.

3. ATMP Acid

The chemical product name is amino trimethylene phosphonic acid. ATMP has nice chemical stableness, isn’t easy to hydrolyze, and it is resistant to high temps. When it’s formulated along with zinc salts and copolymers, it has a fantastic synergistic effect and a solubility limit effect.

This chemical can also have nice corrosion inhibition general performance with large quantities. And it’s also a non-toxic, environment-friendly agent. ATMP 50 features excellent dispersion and scale inhibition properties for the purpose of calcium carbonate scale.


DTPMA is really an organic phosphonic acid developed in the 1980s. It’s chemical term is diethylene triamine pentamethylene phosphonic acid.

It is described as it’s mix along with Mm2+, which includes fantastic corrosion inhibition ability for both carbon steel and copper metal. Because Mm2+ isn’t really covered by environmental laws, the formulation of the chemical has attracted good attraction internationally.

DTPMP scale inhibitor, just like the earlier mentioned organic phosphonic acid. It can also chelate with a plurality of metal ions. The formation of two or more three-dimensional macromolecular ring complexes, loosely dispersed in waters, eliminates the increase of calcium carbonate crystals, thereby playing a part of scale inhibition.

5. Phosphonic Acid

The phosphonic acid molecule includes both a phosphate group -PO(OH)2 and also a hydroxyl group -COOH. In accordance with them all during the combination

You will find lots of types during the place and number of items. In our own business’s formula, PBTCA is used more. It’s chemical title is 2-phosphonobutane-1 2 4 trihydroxy acid.

6. Organic Phosphonate

Now there are many different types of organic phosphonates, however, the next groups can be found inside their molecular structure:

Ever since organic phosphates are quite toxic to aquatic creatures and slowly hydrolyze, the hydrolyzed things are also bio-degradable and thus have no effect on the environment.

Organophosphates are usually used combined with some other chemicals like polyphosphates, zinc salts, lignin and benzotriazole.

The earlier mentioned is a thorough summary of the widely used agents during circulating cooling water. If you have questions on the water treatment chemicals, please contact us.


Detailed Summary About The Generally Used Various Chemicals in Circulating Cooling Waters

2018-12-19T07:39:28+00:00 December 19th, 2018|
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