What equipment is necessary for chemical mixing?
This is a very broad question, so let’s try to break it down and organize it. The first question that we need to ask is, “What is the purpose of this chemical mixing?”
Depending on the process, we will be able to select the appropriate equipment. If we’re talking about blending materials and we use blending equipment, then that is doing blending, it will not extremely diffusivity dependent, it will only moving the material in some time, and if the material will be stable, it will be enough. If we’re talking about complex phenomena, that is, reactions, crystallization, fermentations, or two-phase mixing, then we need to take into consideration another level of mixing, which will again depend on the process.
For instance, for two phases that are not miscible or liquid phases that are immiscible, if we apply a high shear rate, then we will generate an emulsification that is stable and once the stirring stops the materials cannot be separated. This is useful to produce creams, ointments, and similar formulations. When we talk about the same kind of a situation, e.g., liquids that are not miscible, and we want only to move them well, i.e., mix but not emulsify, then we need to use mixing equipment like mixing tank with a low shear rate but that generates enough intensity to create drops in the continuous phase to transfer material from phase to phase. So, it is this kind of issue that requires more specific knowledge about the process. We have in the software a table that we also include in this paper that discusses the connection between mixing equipment and the mixing parameters that influence particular processes. In the end, these are very local questions and the answers vary depending on the project under consideration. In conclusion, mixing is always a unit operation that services a particular process; in other words, one type of equipment can be good for one process and very bad for other processes. The only way to choose the right type for given parameters is to have a good understanding of the process, the materials, and the desired result and of course a good mixing software.
The Influence of Mixing in the Process
New methodology using VisiMix software for the purpose of checking the influence of mixing in the processes.
VisiMix Demo Operation
Learning how to input data into the VisiMix software and get results the will help us understand the influence of mixing in our processes.
Learning how to set up the relevant experiments at the lab scale, to develop the processes from an engineering point of view.