Created by the german chemist Carl Friedrich Claus, it makes it possible to convert hydrogen sulfide (from natural gas) to elemental sulfur.
The overall reaction can be descibed as follows:

$$
2H_2S + SO_2 \rightarrow 3S + 2H_20
$$

The Claus' process served as a better replacement of the Frasch process, which obtained elemental sulfur from naturally found deposits underground.


Claus process

Hydrogen sulfide / Claus process

$$
FeS + 2 HCl \rightarrow FeCl_2 + H_2S
$$


In the laboratory ($H_2S$)

In the laboratory (H2​S)

Hydrogen sulfide / In the laboratory (H2​S)

rope @rope001 0