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Topic: Buchner funnel

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	FILOSA - LoveToKnow Article on FILOSA (Site not responding. Last check: 2007-10-21)
		The liquid to be filtered is poured into the cone, preferably down a glass rod upon the sides of the funnel to prevent splashing and to preserve the apex of the filter-paper, and passes through the paper, upon which the solid matter is retained.
		In the case of liquids containing strong acids or alkalis, which the paper cannot withstand, a plug of carefully purified asbestos or glass-wool (spun glass) is often employed, contained in a bulb blown as an enlargement on a narrow filtertube.
		In the so-called Buchner funnel, the filtering vessel is cylindrical, and the paper receives support by being laid upon its flat perforated bottom.
	28.1911encyclopedia.org /F/FI/FILOSA.htm (960 words)

	min sep
		Fill Buchner funnel with DI water until the mafics are completely submerged.
		Discard filter paper and mafics and clean the Buchner funnel with a DI rinse.
		5) With the Buchner funnel and vacuum flask in place on the vacuum line, place a new sheet of filter paper in the funnel and wet with DI water.
	www.uvm.edu /cosmolab/lab/msepmeth.html (1270 words)

	Casino Encyclopedia (Site not responding. Last check: 2007-10-21)
		A Buchner flask (Sometimes called a vacuum flask, but this can be confused with thermoses) is a thick walled erlenmeyer flask with a glass tube and hose barb leading about an inch out of the neck of it.
		This is usually attached with a vacuum hose to an aspirator and a Buchner funnel placed in the mouth of the flask.
		This is frequently used to dry out a sample placed in the funnel.
	www.casinoencyclopedia.com /index.php?title=Buchner_flask (139 words)

	barium_labdoc.htm (Site not responding. Last check: 2007-10-21)
		Dry the funnel and sample for one hour in a 120°C oven, allow to cool to room temperature in a dessicator, and then weigh the funnel and contents on an analytical balance.
		Insert the funnel into a 14/20 500-mL round-bottom flask and attach to a trap that is attached to an aspirator.
		Drip the water from the funnel onto the compound in the filter (stirring gently) using vacuum filtration.
	wulfenite.fandm.edu /barium_labdoc.htm (2283 words)

	MSN Encarta - Search Results - Buchner funnel
		MSN Encarta - Search Results - Buchner funnel
		Buchner, Eduard (1860-1917), German chemist and Nobel laureate, born in Munich, and educated at the University of Munich.
		A tornado becomes visible when a condensation funnel made of water vapor (a funnel cloud) forms in extreme low pressures, or when the tornado lofts...
	encarta.msn.com /Buchner+funnel.html (160 words)

	Experiment 12 (Site not responding. Last check: 2007-10-21)
		Carefully place the pre-weighed filter paper into the Buchner funnel so that the paper covers all of the holes in the bottom of the funnel.
		Turn on the vacuum, check if a vacuum exists by carefully covering the funnel with the palm of your hand, and then moisten the filter paper with DI water.
		When you are finished, turn off the vacuum, remove the Buchner funnel, and carefully lift the filter paper with solid out of the funnel using a spatula and transfer it onto the pre-weighed watchglass.
	www.geocities.com /terryboan/3aE12_Stoic2.html (734 words)

	[No title]
		For the Hirsch and Buchner funnels, use a piece of round filter paper which fits the funnel.
		For a Hirsch or Buchner funnel, you will need a filter flask with a sidearm for a rubber tubing connection to the TRAP and the reduced pressure source.
		Rinsing: You should rinse the gravity funnel with a small amount of solvent to wash down the remaining solution that adheres to the filter paper and funnel.
	www.umsl.edu /~orglab/wordfiles/practice.doc (3303 words)

	SBU Chemistry Intro Lab Vacuum Filtration
		The Buchner funnels that we use are made in two pieces that can be joined together so as to make an airtight connection.
		Place the rubber stopper which holds the bottom part of the Buchner funnel in the top of the suction flask.
		When the precipitate is as dry as desired -- but with the aspirator still flowing -- remove the top part of the Buchner funnel (the part with the precipitate and the filter paper) and allow air to enter the filter flask through the bottom part of the aspirator.
	www.sinc.sunysb.edu /Class/che133/techniques/suctfilt/suctfilt.html (1108 words)

	funnels (Site not responding. Last check: 2007-10-21)
		Filter plates are made of high density polyethylene 6.4mm (1/4") thick with a non-porous ring at the periphery of the plate which seals filter paper when used.
		With Perforated Filter Plate Section Similarly, these buchner funnels are also available with a FIXED or REMOVABLE perforated filter plate.
		Made from autoclavable polymethylpentene, the funnels are unaffected by corrosive liquids and are heat resistant to 177ºC (350ºF).
	www.omegabiotek.com /supplyweb/funnels.htm (289 words)

	Filtering (Site not responding. Last check: 2007-10-21)
		Select a Buchner funnel of appropriate size for the amount of residue you are collecting, not the amount of filtrate.
		Put a piece of filter paper in the funnel that fits exactly and wet the paper using a small amount of solvent.
		A Buchner funnel in a filter flask, with rubber tubing connected to an aspirator.
	wulfenite.fandm.edu /labtech/filter.htm (369 words)

	Plastic Funnels, Buchner Funnels, Separatory Funnels
		Funnel tapers and funnel ribbings are carefully controlled to allow the most efficient transfer of product.
		Multi-purpose funnels are ideal for a variety of lab applications.
		Molded of polypropylene, these funnels are unbreakable and resistant to corrosio...
	www.labdepotinc.com /category_details~id~57.aspx (244 words)

	[No title]
		To wash the precipitate, the vacuum is released from the filtering flask and the precipitate on the Buchner funnel is barely covered with a portion of cold solvent.
		The crystals are removed from the Buchner funnel into a 30 ml beaker and placed in a dessicator until the next lab period.
		Collect the crystals on a small Buchner funnel or Hirsch funnel and wash with 5 ml of cold water.
	facstaff.uwa.edu /rcollison/Crystallization.doc (1117 words)

	SME Laboratory Procedure - Long-term C & N Mineralization (Site not responding. Last check: 2007-10-21)
		Add a layer of washed glass beads to the buchner funnel.
		Then tranfering the funnel to the side-arm flask that will be used for leaching.
		Place buchner funnel on a large sidearm flask.
	www.oznet.ksu.edu /pr_sme/lab/ltmin.htm (656 words)

	filtering funnels (Site not responding. Last check: 2007-10-21)
		From left to right: Buchner funnel and the grey rubber adaptor for it, stemmed funnel, and stemless funnel.
		The Buchner funnel is the white porcelein funnel in your lab drawer.
		The Buchner is used exclusively for vacuum filtrations.
	orgchem.colorado.edu /equipment/glassware/filtfun.html (221 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		Because the suction is quite strong, it is necessary to use a special funnel called Buchner Funnel to support the filter paper otherwise the paper might break through.
		Place the funnel (Buchner or Gooch) on the flask using a filter-vac to form a seal.
		If using a Buchner funnel, place a piece of filter paper slightly smaller than the funnel diameter over the holes in the bottom of the filter.
	webpub.alleg.edu /employee/n/nlowmast/VacuumFilter.doc (326 words)

	Funnels - Used Surplus Equipment
		We obtained these funnels through the University Surplus System, and they appears to be in Good Condition, without any chips or cracks, however there is a num...
		There are 2 500ml and 1 250 ml funnels.These funnels are in excellent condition with no chips or cracks.
		The largest funnel has minor chipping on the top, but is still functionable.
	www.labx.com /v2/newad.cfm?catID=118 (648 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		Filtration: This is done through use of a Buchner funnel.
		The solution is poured into the Buchner funnel which is covered with filter paper.
		Water pressure is used to drain all the liquid from the solution leaving the filtrate on the filter paper.
	www.umich.edu /~chemh215/W01HTML/SSG2/ssg5/exp/expnote17.htm (43 words)

	The Organic Chemistry Laboratory Web Pages - UW Madison
		The Buchner funnel is used in vacuum or suction filtration in order to separate solids from liquids.
		Wet the filter paper with the solvent you are using to create a seal before filling it with the solution to be filtered.
		Sometimes you must press the funnel down onto the top of the vacuum flask to create a good seal.
	www.chem.wisc.edu /areas/organic/orglab/equip/buchner.htm (110 words)

	Laboratory funnel - Wikipedia, the free encyclopedia
		A laboratory funnel has a variety of uses within the laboratory.
		They are generally used to either filter liquids or to add them controllably to another substance.
		The most widely used laboratory funnels are listed below:
	en.wikipedia.org /wiki/Laboratory_funnel (62 words)

	Two Glass Separatory Funnel s 500 1000mL PTFE (Site not responding. Last check: 2007-10-21)
		Offered for bid is a set of 3 new porcelain buchner funnels, three sizes of filter paper, and a filter aid.
		This molded filter disc is designed to support and seal in place a filter crucible or a funnel in the neck of a filter flask.
		We also are auctioning on Ebay other apparatus for filtering such as hand vacuum pumps, buchner funnels and filtering flasks.
	www.elitekonceptz.com /items/7520585151.html (464 words)

	[No title]
		The Buchner funnel is put back into the top of the filtering flask.
		The vacuum is turned back on, the vacuum hose is attached to the filtering flask, and the top of the Buchner funnel is covered with the palm or section of latex rubber glove.
		The filter cake can now be dumped out onto a glass or China plate (not plastic) by tipping the Buchner funnel upside-down and tapping it gently on the plate.
	pz2005.topcities.com /parazite.org/p48-03.txt (2204 words)

	public_html\documents\practice
		Use a HIRSCH or BUCHNER funnel with vacuum when you do want the solid but....
		Rinsing : You should rinse the gravity funnel with a small amount of solvent to wash down the remaining solution that adheres to the filter paper and funnel.
		Separatory Funnel : This glass equipment is very cleverly designed to carry out the task of separating two immiscible liquids (which form two distinct layers).
	www.umsl.edu /~orglab/documents/practice.htm (3574 words)

	Synthesis of Alum
		Place a funnel in your funnel holder, and place a labeled beaker beneath the funnel.
		Transfer the reaction mixture to the filter paper in the funnel.
		Don't forget to bring the lab handouts back to the next lab period, because the lab report is due in the next lab period.
	web.lemoyne.edu /~giunta/chm151L/alum.html (814 words)

	Filtration
		Support the glass funnel in a ring or place it in the neck of an Erlenmeyer flask.
		Vacuum filtration uses either a Buchner or a Hirsch funnel.Vacuum filtration is faster than gravity filtration, because the solvent or solution and air is forced through the filter paper by the application of reduced pressure.
		Place a piece of filter paper in the funnel that is small enough to remain flat but large enough to cover all of the holes in the filter.
	orgchem.colorado.edu /hndbksupport/filt/filtration.html (1038 words)

	PREPARATION OF SUBSTITUTED PYRIDINES VIA REGIOCONTROLLED [4 + 2] CYCLOADDITIONS OF OXIMINOSULFONATES: METHYL ...
		A 100-mL, three-necked, round-bottomed flask equipped with an argon inlet adapter, magnetic stirring bar, rubber septum, and solid addition funnel fitted with a rubber septum (Note 1) is charged with 4.00 g (27.8 mmol) of Meldrum's acid (Note 2) and 23 mL of methanol (Note 3).
		The resulting peach-colored mixture is vigorously stirred for 30 min, then the solids are collected by filtration on a Buchner funnel with the aid of 40 mL of cold methanol.
		The resulting orange solution is stirred for 3 hr at −78°C to give a yellow solution which is then quenched by the addition of 60 mL of saturated sodium potassium tartrate solution in one portion.
	www.orgsyn.org /orgsyn/orgsyn/prepcontent.asp?print=1&prep=v80p0133 (2188 words)

	Articles of Interest
		Buchner (1860-1917), a German chemist, won a Nobel prize for his work on fermentation which completely disproved the vitalist theories.
		He was, of course, the inventor of the Buchner funnel which is still widely used.
		Buchner was killed in action in Rumania during the first World War.
	www.udel.edu /chem/GlassShop/articlesofinterest.html (5899 words)

	Pilot Plant Reaction Systems - Page 36 (Site not responding. Last check: 2007-10-21)
		316 Stainless Steel Buchner Funnel for organic or inorganic chemical synthesis.
		Large separatory funnel for use where large volumes are needed.
		Cylindrical, pilot plant size, 50 liter capacity funnel.
	www.aceglass.com /html/pilot_plant/36.html (232 words)

	SME Laboratory Procedure - Odds and Ends (Site not responding. Last check: 2007-10-21)
		Use a big rubber stopper gently force the soil through the sieve onto a sheet of paper (there is a big roll of brown paper).
		Build Buchner Funnels Cut out a membrane filter to fit the buchner funnel.
		Place the filter in the funnel and use caulk to attach the filter to the funnel.
	www.oznet.ksu.edu /pr_sme/lab/misc.htm (224 words)

	Mountain Home Biological - 800 958 9629 - www.pelletlab.com (Site not responding. Last check: 2007-10-21)
		These polypropylene 2-piece funnels are light-weight, easy to clean and autoclavable.
		Unbreakable polypropylene funnels have three external ribs to prevent air lock.
		Stem length is approximately the same as funnel diameter.
	www.pelletlab.com /lab_supplies_filtering.htm (204 words)

	The Science Tool Box: How To Lab Safety Techniques
		While holding the funnel over a waste container, moisten the filter paper and funnel with your solvent.
		(A Buchner funnel is a flat-bottomed funnel with a perforated surface.)
		Place the funnel's stem against the inner wall of a filter flask; this reduces splashing.
	www.sciencetoolbox.com /articles/article_09-28-04.html (2069 words)

	[No title]
		I filtered the gel again using a Buchner funnel and four volumes of cold deionized water.
		I shook the 25 ml slurry of the cold gel and filtered using a Buchner funnel.
		C. I filtered the solution using a Buchner funnel and washed with 140 ml of cold deionized water.
	www.bio.davidson.edu /old_site/student/Cooke/dlcmm.html (1228 words)

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