Buchner Funnel with Filter Bottle PTFE Filter Device Pharmaceutical Factory

Precautions

When filtration, first turn on the water pump, and when it is finished, first pull out the tube, and then turn off the power to return it to normal pressure to prevent back suction; choose a Buchner funnel and a filtration bottle of appropriate size.

Precautions

When filtration, first turn on the water pump, and when it is finished, first pull out the tube, and then turn off the power to return it to normal pressure to prevent back suction; choose a Buchner funnel and a filtration bottle of appropriate size.

The Buchner funnel is a ceramic instrument used in the laboratory, also made of plastic, used for filtration using vacuum or negative pressure suction.

There are many specifications and sizes. Some commonly used specifications are 60mm, 80mm, 100mm, 120mm, 150mm, 200mm, 250mm, 300mm, etc.

When using it, generally put filter paper on the bottom of the cylinder, insert the funnel into the upper opening of the Buchner flask and seal the interface (for example, with a rubber ring). The side port of the Buchner beaker is equipped with an air extraction system. Then pour the solid and liquid mixture to be separated into the top. The liquid components are pumped into the beaker under negative pressure, while the solids remain above.

Often used to extract crystals in organic chemistry experiments. After the filtration in this case is completed, a small amount of pure solvent can be used above to wash away the impurities on the crystal surface.

Use of cloth funnel

Before use, you need to prepare filtration equipment, such as vacuum pump, filtration bottle, Buchner funnel holder (seal ring), vacuum tube (rubber tube), filter paper, Buchner funnel, etc. First wet the filter paper with water and pump it until the filter paper is close to the bottom of the funnel, which can prevent the things to be filtered from leaking out. Pour in the filtrate, turn on the machine to pump, stir it slightly, and only the filtered substance will remain. It is not possible to directly use an ordinary funnel, attach the filter paper, and then connect it to an air pump for suction filtration (replacing the Buchner funnel). Because the four walls of the funnel are close to the filter paper, negative pressure suction filtration has no effect on it. There is a pressure difference only at the lower top corner of the funnel. Since the opening is large and has only one opening, it can easily break. (Wet filter paper is not strong)

5. PTFE series products:

Beakers, crucibles, flasks, medicine spoons, tweezers, Petri dishes, evaporating dishes, watch dishes, joints, valves, enzyme plates, reagent bottles, centrifuge tubes, funnels, volumetric flasks, weights, test tube racks, stirring rods, medicine spoons , Buchner funnel, digestion flask, etc.