Slaked lime (calcium hydroxide) is an inorganic compound.
In production, it is produced by mixing water with calcium oxide.
Widely used slaked lime was obtained in the manufacture of building materials such as gypsum mortar, plaster and white.
Calcium hydroxide is obtained in laboratoryConditions by mixing sodium hydroxide and an aqueous solution of calcium chloride. In the mineral form, hydrated lime is found in some metamorphic, volcanic and deep rocks.
In addition, the production of calcium hydroxide is possible when burning coal.
Calcium hydroxide is a white odorless powder or colorless crystals that decompose when heated to 560 degrees by water and calcium oxide.
The refractive index of calcium hydroxide is 1.574, the acidity (pKa) is 12.4, the solubility in water is 0.189 g / 100 ml, the density is 2.211 g / cm3, the molar mass is 74.093 g / mol.
In alcohol, hydrated lime does not dissolve.
Lime water is a saturated solution of white calcium hydroxide. Its antacid properties are used in the medical field in the treatment of acid burns.
Slaked lime is widely used in the following industries:
- for the production of calcium stearate - in the chemical industry-
- for the production of additives to oils - in the oil refining industry -
- for the production of metals. Calcium hydroxide is added to the treated gas stream, to neutralize the acid-
- to improve the quality of earth soil - road construction-
- for storage of vegetables in hangars - production of antimicrobial and antifungal preservatives.
To mitigate the greenhouse effect and reduce atmospheric CO2, calcium hydroxide is used as an additive in seawater.
Also, slaked lime is used as a natural alternative to chemicals in the fight against beetles, fleas, ticks and their larvae.
Often in the construction industry, slaked lime is used to coat rafters and whitewash wooden fences. Thus, the materials protect from fire and rot.
Calcium hydroxide also takes part in the manufacture of brake linings, depilation creams, tank mixes, bleach, ebonite, etc.
In dentistry, a special composition of hydrated lime is used as a disinfectant for the root dental canals.
In the food industry, hydrated lime inExcess is used as food additive Е526. It is added in the manufacture of baby food, fruit juices, energy, non-alcoholic and alcoholic drinks, sugar cane, baking and flour products, corn tortillas, sweets and confectionery products, edible salt, pickled cucumbers.