How Do I Set Up Vacuum Filtration and How Does It Work?

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 scientists used to separate a solid from a liquid, sometimes filtration can 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 remaining 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.
Stainless Steel Six-Branches Vacuum Filtrations 3-Branches Vacuum Filtrations

How Does Vacuum Filtration Work

Vacuum filtration is a common laboratory technique used to separate solid particles from a liquid suspension by applying a vacuum to facilitate the filtration process. It’s especially useful when working with large volumes or when rapid filtration is needed. Vacuum filtration is an operation of evacuating the air below the filter paper to maintain the pressure differential across the filter medium. It increases the rate of filtration through the force on the solution over gravity. Here’s how 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. A vacuum filtration set-up is widely used when particles are dissolved in a solvent and recovered through heating, as while as the liquid evaporates.

When we use vacuum filtration to collect the recrystallized solids, the remains after the evaporation process are deposited from the flask onto filter paper and put into a Buchner funnel. With the filter flask attached to the funnel, 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 test 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 sidearm. The filter flask should have enough suction if the connection is secure.

When setting vacuum filtration, the first step is fitting the Buchner funnel into a suction flask. After that, we can connect the side arm of the flask to our vacuum pump which is of high quality, advanced design, and high efficiency.

The next step is to put the filter paper into the funnel and wash it with the solution. Don’t forget to get the right filter paper which has the right material, pore size, and the right size for your funnel. After that, you can decant the liquid phase into the funnel first and then add the precipitate.

To get a better result, you’d better add a little bit of wash liquid over the surface of the precipitate to wash it. The force of the vacuum will draw the liquid through the solid slowly. At the same time, the precipitate will dry out by drawing a current of air through it.

Hawach provided glass one branch Vacuum filtration, Stainless Steel Single-Branch Vacuum Filtration Manifold, Stainless Steel Triple-Branches Vacuum Filtration Unit, stainless steel six branch Vacuum filtration, Standard Diaphragm Vacuum Pumps, and Anti-Corrosion Diaphragm Vacuum Pump for your choice.