**2.4 Spray drying**

Spray drying is a widely used method in the pharmaceutical industry for converting a liquid or a solution into a dry powder as shown in **Figure 6**. The process involves atomizing a liquid feed into a spray of small droplets, which are then dried by hot gas streams in a spray dryer. As the droplets travel through the dryer, the solvent evaporates, leaving behind a dry powder [23].
