Name the following reaction.

The given reaction shows sodium phenoxide reacting with carbon dioxide ($CO_2$) at a temperature of $398\text{ K}$ and a pressure of $6\text{ atm}$ to form sodium salicylate as an intermediate. Upon subsequent acidification ($H_3O^+$), salicylic acid (2-hydroxybenzoic acid) is formed as the major product.

This specific sequence of converting phenol (via its sodium salt) into salicylic acid using $CO_2$ is known as the Kolbe reaction (or Kolbe-Schmitt reaction).

Answer: Kolbe reaction