Contact Process

due southic acid is a product of the chemical manufacturing produced in the largest quantities. Over 40 million tones are produced both year. The two main ways of producing do byic acid are the lead chamber exploit and reach out process. The contact process is used more today and is much more efficient, cheaper and faster. The contact process yields pure processic acid. The contact process was procure by Peregrine Philips in 1831. [1]
The contact process is carve up into several stages in which sulfur dioxide is produced and then converted into sulfur trioxide. Sulfur trioxide is then converted into concentrated sulfuric acid.
Sulfur dioxide can be obtained by several ways. One of them is by burning sulfur in the burner in the contact process machine. Liquid sulfur is added to the burner were it its reaction with dry stemma happens and produces sulfur dioxide.
S(s) + O2(g)  SO2(g)
A nonher way of preparing the sulfuric dioxide is by roasting pyrite (iron sulfide) in a pyrite burner,
4 FeS(s) + 7 O2(g)  2 Fe2O3(s) + 4 SO2(g)
…or by burning hydrogen sulfide.
2 H2S(g) + 3 O2(g)  2 SO2(g) + 2 H2O(g)
It is very important to subdue accelerator poisoning (stopping catalytic activities) by purifying the air and sulfuric dioxide. Sulfuric dioxide is purified by going through a dust chamber where dust particles are removed.



After that it is sprayed with water, which helps with removing fat-soluble impurities and in the end, the sulfuric dioxide is dried by using H2SO4.
SO3(g) + H2O(l)| H2SO4| H2SO4(l)|
| | |

In all cases the excess of air is used in a way that the produced sulfur dioxide is already mixed with oxygen for the succeeding(a) stage of the contact process. This happens catalytically. In other words, a catalyst is used to speed up the chemical reaction, moreover it does not change the position of the equilibrium and it does not produce either greater percentage of sulfur trioxide. The catalyst used is volt (V) oxide (V2O5). Platinum would be a more effective catalyst, but it...If you want to get a full essay, order it on our website: Orderessay



If you want to get a full essay, wisit our page: write my essay .