Difference Between Quicklime and Hydrated Lime l Quicklime vs Hydrated Lime


The key difference between quicklime and hydrated lime is that the quicklime (or burnt lime) contains calcium oxide whereas the hydrated lime (slaked lime) contains calcium hydroxide.

The major source for both quicklime and hydrated lime is the limestone. Therefore, like limestone, these compounds are also alkaline. We call quicklime as “burnt lime” because we produce it by the thermal decomposition of limestone. We call hydrated lime as “slaked lime” because we produce it by quenching quicklime with water.

CONTENTS

1. Overview and Key Difference
2. What is Quicklime
3. What is Hydrated Lime
4. Side by Side Comparison – Quicklime vs Hydrated Lime in Tabular Form
5. Summary

What is Quicklime?

Quicklime is calcium oxide. We produce it by the thermal decomposition of limestone. Therefore, we call it “burnt lime”. Limestone contains calcium carbonate. We burn this material to above 825 °C. we call this process “calcination”. It liberates carbon dioxide forming quicklime. This substance is relatively inexpensive.

The chemical formula of the compound is CaO. Its molar mass is 56.07 g/mol. It appears as a white to pale yellow powder. Moreover, it is odorless. The melting point and boiling points are 2,613 °C and2,850 °C respectively. This compound is highly water soluble; it forms calcium hydroxide. The crystal structure of this compound is cubic.

Uses

There are many uses of this compound which includes its applications in basic oxygen steelmaking process, in the production of aerated concrete blocks, as a component in producing glass, organic chemicals, etc. Moreover, it is a key ingredient in producing cement.

What is Hydrated Lime?

Hydrated lime is calcium hydroxide. We call it “slaked lime” as well. This is because we produce calcium hydroxide via quenching calcium oxide with water. In addition to that, there are many other synonyms for this compound, i.e. caustic lime, builder’s lime, slack lime, pickling lime, etc. A saturated solution of calcium hydroxide is called “lime water”.

The chemical formula of this compound is Ca(OH)2. The molar mass of this compound is 74.09 g/mol. It appears as a white powder and is odorless. The melting point is 580 °C, and it decomposes upon further heating (it releases water vapor). However, the solubility of this compound in water is poor.

Difference Between Quicklime and Hydrated Lime l Quicklime vs Hydrated Lime

Figure 01: Production of Quicklime and Slaked Lime (Hydrated Lime)

Hydrates lime is available as either a powder or as granules. However, the end product given from the production process appears as a dry, powder-like flour which has a light (mostly white) color. The uses of this compound are in flue gas treatment, neutralizing industrial wastewater, etc.

What is the Difference Between Quicklime and Hydrated Lime?

Quicklime is calcium oxide with the chemical formula CaO whereas, hydrated lime is calcium hydroxide with the chemical formula Ca(OH)2. This is the key difference between quicklime and hydrated lime. Furthermore, the molar mass of quicklime is 56.07 g/mol while the molar mass of hydrated lime is 74.09 g/mol. Moreover, the melting point and boiling point of quicklime are 2,613°C and 2,850°C respectively whereas the melting point of hydrated lime is 580°C, and it has no boiling point because it decomposes upon further heating (it releases water vapor). Moreover, there are many uses of both these compounds. Quicklime is useful in basic oxygen steelmaking process, in the production of aerated concrete blocks, as a component in producing glass, organic chemicals, etc. while hydrated lime is useful in flue gas treatment, neutralizing industrial wastewater etc.

The below infographic presents more details on the difference between quicklime and hydrated lime in tabular form.

Difference Between Quicklime and Hydrated Lime l Quicklime vs Hydrated Lime

Summary – Quicklime vs Hydrated Lime

We produce quicklime from limestone and hydrated lime from quicklime. The key difference between quicklime and hydrated lime is that the quicklime contains calcium oxide whereas the hydrated lime contains calcium hydroxide.

Reference:

1. “Calcium Oxide.” Wikipedia, Wikimedia Foundation, 3 Aug. 2018. Available here
2. “Usage of Hydrated Lime (Calcium Hydroxide) & Quick Lime (Calcium Oxide) | Sodimate Inc.” Sodimate, 2 Jan. 2018. Available here

Image Courtesy:

1.”LIME CYCLE”By Tfann – Own work, (CC BY-SA 4.0) via Commons Wikimedia

The key difference between Agglutinogens and Agglutinins is that the agglutinogens are any type of antigens or foreign bodies which activate the making of agglutinin antibodies while the agglutinins are antibodies generating by our immune system against antigens. Agglutination is the process of forming aggregations due to the combination of antibodies with antigens. It involves two steps; initial binding or the sensitization and lattice formation. It is a kind of immune response to remove pathogenic microbes and substances out from our body. Agglutination is used to detect blood groups and other pathological entities. CONTENTS 1. Overview and Key Difference 2. What are Agglutinogens 3. What are Agglutinins 4. Similarities Between Agglutinogens and Agglutinins 5. Side by Side Comparison – Agglutinogens vs Agglutinins in Tabular Form 6. Summary What are Agglutinogens? Agglutinogens are the particulate antigens that form clumps during agglutination. These antigenic structures stimulate the formation of agglutinin in the....... READ

The key difference between Communism and Capitalism is that the communism advocates community ownership of production whereas capitalism advocates private ownership of production. Thus, communism and capitalism are two political and economic ideologies which focus on the ownership of goods and products. Various states and countries in the world follow these two opposing philosophies. Communism rose as a response to capitalism in the late 20th century. CONTENTS 1. Overview and Key Difference 2. What is Communism 3. What is Capitalism 4. Side by Side Comparison – Communism vs Capitalism in Tabular Form 5. Summary What is Communism? Communism can be identified as an amalgamation of varied political theories and ideologies among which Marxism stands as a fundamental. Moreover, Communism goes hand in hand with socialism, which highlights community rights and equalities. Moreover, we can define communism as the political and economic philosophy of public ownership of production; therefore the profit.......READ

Be the first to comment

Leave a Reply

Your email address will not be published.

*