Question

How will you prepare carbolic acid from cumene?​

Answer 1

Answer:

Cumene (isopropylbenzene) is oxidised in the presence of air to cumene hydroperoxide. It is converted to phenol and acetone by treating it with dilute acid.

Answer 2

Answer:

Carbolic acid, which is also known as phenol, can be prepared from cumene using the cumene hydroperoxide process.

Here are the steps involved:

• Cumene is oxidized with air or oxygen to form cumene hydroperoxide. This reaction is typically carried out in the presence of a catalyst such as molybdenum or tungsten.

• The cumene hydroperoxide is then cleaved by acid to form phenol and acetone. The reaction usually takes place with an acid catalyst present, like sulfuric acid or phosphoric acid.

• The phenol and acetone are then separated by distillation, with phenol being the more volatile compound and therefore boiling off first.

• Overall, the process can be summarized by the following equation:

         Cumene + Oxygen → Cumene Hydroperoxide

         Cumene Hydroperoxide + Acid → Phenol + Acetone

• It's worth noting that the cumene hydroperoxide process is one of the most common methods for producing phenol on an industrial scale.

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