Solid phosphoric acid catalyst is a white powdery solid, including two basic shapes, irregular shape and spherical shape. It does not require any special storage conditions. It is stable, stable and nonflammable under normal conditions.
In the laboratory, the solid phosphoric acid catalyst can replace the liquid acid catalyst and be directly added into the reaction solution for mixing. The catalyst can be recovered by simple filtration. This technology also reduces the general process of alkali neutralization and water washing.
In order to prevent the crushing of catalyst particles from affecting the filtration, magnetic stirrer is not recommended, but mechanical mixing is recommended.
In factory production, solid phosphoric acid catalyst is used in both mixed reactor and fixed bed. The main advantage of using in fixed bed is that this type of catalyst does not expand and deform, and its excellent physical and chemical properties are stable.