Name: Methods of Prevention from Corrosion
Uploaded: 2019-07-19
Duration: 5 min 3 s
Description: Do you know how corrosion can be prevented? There are various methods such as coating with paint or plastic, oiling, alloying, galvanising and enamelling. Le...

Question

Explain the Frasch process for the extraction of sulphur with the help of a labelled diagram.

Accepted Answer

Frasch process is a method to extract sulphur from underground deposits. Elemental sulphur is found in the deposits in the ground. There are two properties of sulphur that are used in its extraction process. These are (i) its low melting point and (ii) low density. In the Frasch process, superheated water is pumped into the sulphur deposit, the sulphur then melts, which is then extracted by lifting it to the surface with compressed air.

The extraction process involves the following steps:
First, a well is drilled into the soil for mineral deposits. Then after this, the superheated water is pumped into the deposit (this water was approximately heated to $170$ degrees Celsius).
As a result of this, the sulphur in the deposit melts due to its low melting point.

Now, besides the water pumped into the well, compressed air is also pumped into it. We know that sulphur has a low density and due to this reason, the molten sulphur comes to the surface.
The low density of sulphur allows the compressed air to push it to the surface.

Now, the sulphur can cool down and solidify since it is on the surface. From here, sulphur forms a rhombic crystal. Thus, in this way sulphur is extracted by Frasch process.

Explain the Frasch process for the extraction of sulphur with the help of a labelled diagram.

Important Questions on Metals and Non-Metals

Learn and Prepare for any exam you want !