Buchner funnel and its suction filtration device

规格：

6cm~20cm 可定制

材质：

PTFE

Buchner funnel and its suction filtration device
1. Product introduction
PTFE Buchner funnel[]
and its suction filtration device, referred to as PTFE suction filter bottle, suction filtration device. It is an instrument used in laboratories for filtration using vacuum or negative pressure suction. It is generally believed that the inventor is Edward Bichner, the winner of the Nobel Prize in Chemistry. In fact, the Buchner funnel was invented by the chemist RM. In modern laboratories, ceramic Buchner funnels and their matching glass filter bottles are gradually replaced.
The Buchner funnel is in the shape of a flat cylinder. There are many small holes on the bottom of the cylinder, and there is a long and narrow cylindrical outlet. Please refer to the picture for details.
2. Instructions for use
When using, 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 suction filter bottle (polytetrafluoroethylene material is generally recommended) is connected to the suction system. Then pour the solid and liquid mixture to be separated into the top, and the liquid components are pumped into the suction filter bottle under the action of negative pressure, leaving the solids above. The polytetrafluoroethylene suction filter bottle has a certain thickness and can withstand a certain negative pressure. It will not be deformed or damaged during suction filtration. It is the best choice for modern laboratory filtration.
It is often used to extract crystals in organic chemistry experiments. After the filtration is completed, a small amount of pure solvent can be used above to wash away the impurities on the crystal surface.
3. Use of Buchner funnel
First wet the filter paper with water, and pump it so that the filter paper is close to the bottom of the funnel, which can prevent the things to be filtered from leaking. Pour in the filtrate, start the machine to pump, stir it a little, and only the filtered substance remains (see High School Chemistry "Experimental Chemistry")
Use an ordinary funnel directly, attach the filter paper, and connect the air pump for suction filtration ( Replacement of PTFE Buchner funnel) is not possible. 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 mouth is large and has only one mouth, it is easy to break (making the filter paper weak and affecting the filtration results)
4. Characteristics of the Buchner funnel
It can replace the ceramic Buchner funnel on the market. Avoid fragmentation
. Strong corrosion resistance: can withstand strong acid and alkali, aqua regia, magic acid, hydrofluoric acid and other organic reagents
. Pure white appearance, high temperature resistance: use temperature to + Degree
. Anti-pollution: The blank value of metal elements is low, and the content of lead and uranium is less than .b
. The surface does not stick and is easy to clean
. It can also be filtered using vacuum or negative pressure suction The matching suction filter bottle is used for vacuum filtration of crystals or coarse sediments in inorganic preparation, which can prevent corrosive solvents from splashing
5. Suction filtration device
Simply put, it is a customized suction filter bottle , equipped with a Buchner funnel and connected to the exhaust system on the side, it is simple to install and use, and the entire device is made of polytetrafluoroethylene material, which will not break, has a long service life, and can withstand strong acids and alkalis. , aqua regia, hydrofluoric acid and other organic solvents.
The entire PTFE suction filter device is made of PTFE material, and the surface is non-stick, making it easy to clean after the experiment.
Remarks: Buchner funnels of various specifications and matching suction filtration devices can be customized according to customer requirements.
6. Application of suction filtration bottles
Polytetrafluoroethylene suction filtration bottles and their entire filtration device are now increasingly used by the majority of users and are the most indispensable items in current filtration experiments. One of the best tools and widely used in chemical experiments.
Nanjing Ruinike Technology Development Co., Ltd.
Contact person Su Yang QQ
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