How Do I Set Up Vacuum Filtration And How Does It Work?
The vacuum filtration collects pollutants (mainly dust) sucked from the atmosphere to prevent system pollution, and is used between the suction cup and the vacuum generator (or vacuum valve).
It is mainly suitable for vacuum filtration in the production process of chemical medicine, petroleum and other industries. It can ensure that trapped particles are evenly distributed on the surface of the filter membrane, so it is particularly suitable for particulate matter Collection and counting. The other type uses a PTFE-coated stainless steel screen as a filter support pad, which is suitable for collecting filtrate, such as removing particles from samples. This type of filter is also recommended when filtering thicker liquids, such as when collecting particles from oil samples.
Known as a technique that the scientists used to separate a solid from liquid, sometimes the filtration can be deal with gravity which is very simple. But more and more people choose vacuum filtration, because it is faster and more efficient.
When you set up a vacuum filtration kit,first you should make sure to clamp your filter flask securely, as the flasks are easily upended. Also you should use the trap between your filter flask and the aspirator, and the thick-walled vacuum tubing, not the thin one.
After your setup is done, you can put a piece of filter paper on the filter and make it wet with the solvent you are going to pour through the filter.
You will find that a mixture of a solid and a liquid separated when you pour it through the filter. You can move the remained solid which stays in the flask with the aid of a spatula and wash it with a small amount of the solvent with low solubility.
How Does Vacuum Filtration Work?
Vacuum filtration is a separation method that can remove a solid from a liquid, which needs a filter to separate the solid from the liquid solution, and the vacuum pump that forces the liquid through the filter. Vacuum filtration set-up is widely used when particles dissolved in a solvent and recovered through heating, as while as the liquid evaporates.
When we use the vacuum filtration to collect the recrystallized solids, the remains after the evaporation process are deposited from the flask onto a filter paper and put into a Buchner funnel.
With the filter flask attached to the funnel and, the air will be sucked out of the side opening through a rubber tube that is attached to the vacuum. After we pour the liquid solution into the funnel with filter paper, the vacuum will force the solvent through the filter paper and we will get the deposited in the filter flask.
The key point to the process is to testing the suction. We attach the rubber tube to the vacuum first and test for suction at the other end of the tube. Then, we attach the tube to the filter flask’s side arm.The filter flask should have enough suction if the connection is secure.