Hydration: purification by water
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Quicklime can further be hydrated, i.e. combined with water. Depending on the quantity of water added and the intended use, hydrated lime (Ca(OH)2 = calcium hydroxide) is obtained either in the form of very fine dry powder suitable for a variety of applications.
The reaction reads as follows:

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Carmeuse produces various grades of hydrated lime of different fineness
and purity in order to meet different market requirements.
Carmeuse also produces “milk of lime”, a ready for use suspension of calcium hydroxide in water.