The method of making ethyl acetate from acetaldehyde
If you want to start with acetaldehyde to make ethyl acetate, there must be a method.

First, acetaldehyde needs to be oxidized. Acetaldehyde can be mixed with oxygen, supplemented by a suitable catalyst, such as a certain metal oxide. Under a specific temperature and pressure, acetaldehyde is oxidized in contact with oxygen, and then becomes acetic acid. In this process, the structure of acetaldehyde is gradually changed, and its aldehyde group is oxidized into a carboxyl group to produce acetic acid.

Second, the resulting acetic acid is combined with ethanol. When acetic acid and ethanol are placed in one place, sulfuric acid is added as a catalyst and slightly heated. The two then initiate an esterification reaction. The carboxyl group of acetic acid interacts with the hydroxyl group of ethanol to remove a molecule of water and finally obtain ethyl acetate. This reaction is a reversible reaction. In order to promote its progress towards the formation of ethyl acetate, the generated water can often be removed during the reaction, or the ratio of the reactants can be adjusted in a timely manner.

In this way, the purpose of making ethyl acetate can be achieved by oxidizing and esterification with acetaldehyde as the base.