Schlenk Type Glassware

This system is specifically designed for additions, chemical reactions, distillations, drying/evaporation, extractions, filtrations, recrystallizations, washing, degassing, and transfers of solids and liquids. For small-scale manipulation of air- and moisture-sensitive reagents. Our Schlenk-type glassware is available with greaseless threaded S.T. 14/20 ground-glass joints and is compatible with the All-in-One Glassware Kit.

• Greaseless threaded S.T. joints require no clamps
• Narrow openings minimize infusion of air during manipulations
• Side-arm stopcocks for evacuation of air and purging with inert gas
• May be used with ordinary glassware with S.T. joints

Addition of Liquids

For the addition of an air-free solvent, or liquid to a solid.

Set-up: Addition funnel, reaction flask or tube and hex head stopper.

Chemical Reaction

After securing the reaction flask and initiating stirring, the apparatus is slowly rotated about the joint between the two adapters, allowing the reagent solution to flow into the reaction flask.

Set-up: Two reaction flasks and two bent adapters.

Distillation

Distillation under inert atmosphere and/or reduced pressure is easily accomplished using this apparatus.

Set-up: A storage flask connected to a Vigreux distilling column, 3-way connecting adapter, thermometer adapter, Liebig condenser, vacuum distillation adapter, and a reaction and storage flask.

Drying/Evaporation

This apparatus is useful for removing solvents from temperature-sensitive materials, especially over long periods of time.

Set-up: Storage and reaction flask via a bent adapter is connected to a cold-trap equipped with a connecting adapter (in-line with glass stopcock).

Extraction and Filtration

Set-ups for the extraction and filtration of solids are illustrated above.

Set-up: Examples 1, 2, and 3 are arrangements of flasks and a filter funnel. Set-up 2 also uses two angled adapters and 3 uses a straight adapter. Set-up 4 has a low-temperature filter funnel connected to a Liebig condenser, equipped with a vacuum adapter, and a reaction and storage flask.

Filtration/Recrystallization

The H-Schlenk tube permits low-temperature filtration if a large cooling bath is used. The illustration shows a set-up for recrystallization. Starting material is transferred from the reaction and storage tube on the far left, to into the H-Schlenk tube where it is dissolved with solvent from the dropping funnel, filtered into the right leg, and recrystallized. Purified material is transferred to the sealing tube on the far right.

Set-up: Double-tube recrystallizer (H-Schlenk tube), reaction and storage tube, dropping funnel, hex head stoppers, straight adapter, joint cap and a sealing tube.

Filtration/Washing/Degassing

An air-sensitive sample dispersed in a wash solvent is loaded via syringe at the top inlet through a septum. Vacuum and inert gas pressure produces the washing action. The stopcocks on the side-arm then redirect the inert gas for filtration.

Set-up: Filter/washer/degasser unit with a rubber septum at the top attached to a reaction flask.

Filtration/ Washing

A precipitate may be collected and washed using this apparatus.

Set-up: Reaction and storage flask connected to a double-ended filter, to a straight adapter, followed by a 3-way connecting adapter connected to a reaction and storage flask and to an addition funnel with a hex head stopper.

Transfer of Solids

Set-up:

No. 1 has a solid transfer vessel attached to a filter funnel via a reducing adapter, straight adapter an joint caps.

No. 2 shows a sealing tube attached to the side-arm of the solid transfer vessel.