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Gravity filtration is the method of choice to remove solid impurities from an organic liquid. The "impurity" can be a drying agent or an undesired side product or leftover reactant. Gravity filtration can be used to collect solid product, although generally vacuum filtration is used for this purpose because it is faster.
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orgchem.colorado.edu/hndbksupport/filt/filtration.html
orgchem.colorado.edu/hndbksupport/filt/filtration.html
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Vacuum filtration usually involves the use of a vacuum filter flask, a filter trap, a water pump, ... Vacuum filtration device: The vacuum filtration device has a disposable filter funnel and a disposable filtrate receptacle. The funnel and receptacle are used with a reusable base that is connected to a vacuum source.
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www.oilgae.com/ref/glos/vacuum_filtration.html
www.oilgae.com/ref/glos/vacuum_filtration.html
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Equipment setup and techniques for performing vacuum filtration.NAIT Chemical Technology Laboratory Techniques Series.
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www.youtube.com/watch?v=yfCAaCbRJwo
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Figure 1 shows a setup for a vacuum (or suction) filtration using a Hirsch funnel. A vacuum filtration is usually faster than a simple gravity filtration. However, there are several points that have to be considered.
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www.chem.ucla.edu/~bacher/General/30BL/tips/vacuum.html
www.chem.ucla.edu/~bacher/General/30BL/tips/vacuum.html
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Q: When do you use vacuum filtration? A: Generally when you want to isolate a solid. It is rapid (in most cases) so the slurry being filtered will remain cold - an advantage in cases where the solid is partly soluble in the solvent being used.
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www.chemistry.sjsu.edu/straus/FAQ/Technique%20FAQ/VacFi...
www.chemistry.sjsu.edu/straus/FAQ/Technique%20FAQ/VacFilterFAQ.htm
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Vacuum filtration is often faster than gravity filtration and is most useful if the solid must be kept or if a filtration must be done rapidly. A vacuum from an aspirator or a vacuum pump is used to pull the liquid through a funnel containing a piece of filter paper, while the solid is left on the paper.
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www.uwplatt.edu/chemep/chem/chemscape/labdocs/catofp/mi...
www.uwplatt.edu/chemep/chem/chemscape/labdocs/catofp/mixpour/filter/filter.htm
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Rotary Vacuum Filters ... The rotary vacuum filter is the workhorse of the chemical process industries. Atmospheric pressure is almost always sufficient for forcing liquid through the filter, but sometimes the entire unit is pressurized to provide additional force. ... Rotary vacuum filtration precoated...
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www.rpi.edu/dept/chem-eng/Biotech-Environ/FILTRATION/ro...
www.rpi.edu/dept/chem-eng/Biotech-Environ/FILTRATION/rotvac.htm
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VACUUM FILTRATION. Dictionary terms for VACUUM FILTRATION, definition for VACUUM FILTRATION, Thesaurus and Translations of VACUUM FILTRATION to Chinese, English, Arabic. ... Define VACUUM FILTRATION...
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www.babylon.com/definition/VACUUM_FILTRATION/All
www.babylon.com/definition/VACUUM_FILTRATION/All
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Abstract not available for EP0075687 Abstract of corresponding document: US4415449 A bench for vacuum filtration of fluid samples includes a stand having at least one aperture f ... A bench for vacuum filtration of fluid samples includes a stand having at least one aperture for receiving and supporting a filter device.
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www.freepatentsonline.com/EP0075687.html
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