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  2. Büchner funnel - Wikipedia

    en.wikipedia.org/wiki/Büchner_funnel

    The wide flange and large surface contact ensures an excellent vacuum tight seal whilst the rings are easy to remove and offer excellent support to even the largest funnels. It is commonly thought to be named after the Nobel Laureate Eduard Buchner (without umlaut), but it is actually named after the industrial chemist Ernst Büchner. [2]

  3. Laboratory funnel - Wikipedia

    en.wikipedia.org/wiki/Laboratory_funnel

    A funnel for hot filtration Two funnels, A - a simple stemmed funnel. B - a ground glass powder funnel. Plain funnels exist in various dimensions, with longer or shorter necks. Filter funnels have a neck of a thin capillary tube and ribs which increase the filter-papers' effectiveness and thus accelerate the process of filtering. [1]

  4. Funnel - Wikipedia

    en.wikipedia.org/wiki/Funnel

    A typical kitchen funnel A ceramic Roman kitchen funnel (1st–3rd century AD) A funnel is a tube or pipe that is wide at the top and narrow at the bottom, used for guiding liquid or powder into a small opening. [1] [2] Funnels are usually made of stainless steel, aluminium, glass, or plastic. The material used in its construction should be ...

  5. Separatory funnel - Wikipedia

    en.wikipedia.org/wiki/Separatory_funnel

    Two funnels: A - Cone, or Pear-shaped, B - cylindrical. A separating funnel takes the shape of a cone with a hemispherical end. It has a stopper at the top and stopcock (tap), at the bottom. Separating funnels used in laboratories are typically made from borosilicate glass and their taps are made from glass or PTFE. Typical sizes are between 30 ...

  6. Büchner flask - Wikipedia

    en.wikipedia.org/wiki/Büchner_flask

    Büchner flask A Büchner funnel is attached to the flask via a black elastomer adapter. The hose barb is connected via vacuum hose to a vacuum source such as an aspirator. The flask should be clamped before use or the hose will likely cause it to tip. Cross section of a Büchner Flask.

  7. Chimney - Wikipedia

    en.wikipedia.org/wiki/Chimney

    Chimneys are adjacent to large industrial refineries, ... and the term funnel can also be used. [1] [2] ... and reduces the size of an oversized flue. Since the 1950s ...

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