A Glance at Gravity Filtration and Vacuum Filtration
Filtration is a technique to separate a solid from a liquid by passing the mixture over a filtering media. The feature of filtering media is chemically inert to the mixture, and all kinds of media have small patch way for the liquid to pass through, while the pathways should be smaller than the solid particle size.
The mixture of solid and liquid can be forced through the filter by two ways, gravity filtration, and vacuum filtration. And each technique has its advantages.
Gravity filtration is often used for filtering larger size particles through kind of course media. It is also the best way of filtration when we use the solvent of low boiling point as the solution is hot.
The advantage for the vacuum filtration is in the condition of filtrating very small particles such as decolorizing carbon. It can force some near pore size solids through the filter media, while gravity filtration can’t. Vacuum filtration is also used to dry crystals to speed up the analysis. It is perfect if you want to save some time in the lab.