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- Drying_tube abstract "A drying tube or guard tube is a tube-like piece of apparatus used to house a disposable solid desiccant, wherein at one end the tube-like structure terminates in a ground glass joint for use in connecting the drying tube to a reaction vessel, for the purpose of keeping the vessel free of moisture.The tube-like structure is often bent and can also widen to form a bulb/desiccant reservoir. Typically a drying tube is 1–2 cm wide and 5–10 cm long and bent at an angle of about 90 degrees. In use, the drying tube is filled with a rechargeable desiccant such as calcium chloride, and the open end of drying tube is partially blocked (e.g. with wool, glasswool or a bung/cork which has a small bore made in it) and the drying tube is connected to the apparatus to be kept dry via the ground glass joint. If the drying tube is bent the bend is oriented so that solid desiccant does not fall into the reaction vessel. Some drying tubes have a glass sinter to prevent desiccant falling into the reaction vessel. Drying tubes are often prepared in advance and the desiccant can be replaced when exhausted.Reactions which are being heated, or which evolve gases, must never be sealed because an overpressure may shatter the vessel. Drying tubes are usually fitted on top of the reflux condenser, allowing the pressure to be relieved while excluding atmospheric moisture.Drying tubes are often used in less-demanding applications, typically in organic syntheses. While the reaction is often carried out at room temperature, the solvent, usually volatile diethyl ether or tetrahydrofuran is already able to displace air directly, making additional measures to exclude atmospheric moisture less important.An oil bubbler may be a useful substitute. In this case, gases are allowed to escape, but air is not able to enter because the bubbler acts as a one-way valve. Oil bubblers can tolerate an underpressure in the reaction vessel. Oil is sucked into a sump in lieu of air. However, if the pressure in the reaction vessel falls too low, the oil may be sucked into the reaction vessel, contaminating it.For more demanding applications, a Schlenk line or glovebox may be used to provide an atmosphere of dry, inert gas such as argon or nitrogen.".
- Drying_tube thumbnail Chem_drying_tubes.jpg?width=300.
- Drying_tube wikiPageID "7713669".
- Drying_tube wikiPageLength "3032".
- Drying_tube wikiPageOutDegree "17".
- Drying_tube wikiPageRevisionID "540678674".
- Drying_tube wikiPageWikiLink Argon.
- Drying_tube wikiPageWikiLink Calcium_chloride.
- Drying_tube wikiPageWikiLink Category:Laboratory_glassware.
- Drying_tube wikiPageWikiLink Chemical_reactor.
- Drying_tube wikiPageWikiLink Condenser_(laboratory).
- Drying_tube wikiPageWikiLink Desiccant.
- Drying_tube wikiPageWikiLink Diethyl_ether.
- Drying_tube wikiPageWikiLink Gas_bubbler.
- Drying_tube wikiPageWikiLink Glovebox.
- Drying_tube wikiPageWikiLink Ground_glass_joint.
- Drying_tube wikiPageWikiLink Inert_gas.
- Drying_tube wikiPageWikiLink Nitrogen.
- Drying_tube wikiPageWikiLink Organic_Syntheses.
- Drying_tube wikiPageWikiLink Schlenk_line.
- Drying_tube wikiPageWikiLink Tetrahydrofuran.
- Drying_tube wikiPageWikiLink File:Chem_drying_tubes.jpg.
- Drying_tube wikiPageWikiLinkText "Drying tube".
- Drying_tube wikiPageWikiLinkText "drying tube".
- Drying_tube wikiPageUsesTemplate Template:Reflist.
- Drying_tube subject Category:Laboratory_glassware.
- Drying_tube hypernym Piece.
- Drying_tube type MusicalWork.
- Drying_tube type Application.
- Drying_tube type Container.
- Drying_tube comment "A drying tube or guard tube is a tube-like piece of apparatus used to house a disposable solid desiccant, wherein at one end the tube-like structure terminates in a ground glass joint for use in connecting the drying tube to a reaction vessel, for the purpose of keeping the vessel free of moisture.The tube-like structure is often bent and can also widen to form a bulb/desiccant reservoir. Typically a drying tube is 1–2 cm wide and 5–10 cm long and bent at an angle of about 90 degrees.".
- Drying_tube label "Drying tube".
- Drying_tube sameAs Q903811.
- Drying_tube sameAs أنبوب_تجفيف.
- Drying_tube sameAs Tub_de_dessecació.
- Drying_tube sameAs Trockenrohr.
- Drying_tube sameAs Tubo_de_secado.
- Drying_tube sameAs 塩化カルシウム管.
- Drying_tube sameAs m.0269p95.
- Drying_tube sameAs Q903811.
- Drying_tube sameAs 干燥管.
- Drying_tube wasDerivedFrom Drying_tube?oldid=540678674.
- Drying_tube depiction Chem_drying_tubes.jpg.
- Drying_tube isPrimaryTopicOf Drying_tube.