Precipitated Calcium Carbonate

Precipitated Calcium Carbonate

Precipitated calcium carbonate is an integral part of our many day to day supplies like detergent powders, talcum powders and so on. PCC (Precipitated Calcium Carbonate) which was first made in 1847 in England has been used in wide variety of products since then and is manufactured in factories like Aranthangi Chemicals Pvt ltd.

Let us first understand what calcium carbonate is. The chemical formula of calcium carbonate is CaCO3 which is similar to other chemicals like limestone/marble or chalk. Initially the manufacturer called John Sturge made a precipitated chalk by treating calcium chloride (which was a residue) from some other process with soda ash and carbon dioxide.

Later after nearly a century, the manufacturing of PCC was started in the USA and rest of the developing nations followed the footsteps.

Here is a look at the Precipitated calcium carbonate manufacturing process:

Simple chemistry is at the base of manufacturing precipitated calcium carbonate.

–          At first, high purity calcium rock from mines is used to create calcium powder which is sieved and only finer particles are used for the further process. The aim is to reduce impurities.

–          It is then sent to the heated kiln at 18500  Celsius. The heat separates CaO and CO2 breaking CaCO3 to CaO (Lime) and carbon dioxide.

–          Water (H2O) is added to lime to get Calcium Hydroxide.

–          After taking out some impurities from Calcium Hydroxide it is introduced to CO2 in order to create Calcium carbonate.

Ca (OH)2 + CO2 = CaCO3 + H2O

–          The Precipitated calcium carbonate is used as a dry product.

The process looks simple but has a lot of details to it to bring the actual CaCO3 to the day to day use.

The chemicals are sometimes a boon to human beings if used correctly and efficiently. Without precipitated calcium carbonate our lives would have been different than what they are now.

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