Schlenk Type Glassware

Phosphazene Bases | Verkade's Superbases | Traditional Bases | Preservation of Reagents

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

Threaded joint consists of an externally threaded female S.T. joint and a corresponding male S.T. joint with a threaded plastic nut and O-ring that seals above the ground-glass joint to make a vacuum-tight, greaseless seal. A simple twist of the nut loosens the joint for safe disassemblCC.

Applications / Products

Applications

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.

Products

Adapters

Description	Standard Taper Joint*	Cat. No.
A. Straight adapter	2-F	Z173215
AA. Straight adapter with drip-tip	2-F	Z220442
B. 1050-Bent adapter with hose barb	1-M, 1-F	Z167444
C. 900-Bent adapter	1-M, 1-F	Z220124
D. 750-Bent adapter	2-F	Z173045
E. Vacuum adapter	1-M	Z167533
F. Thermometer adapter	1-M	Z167568
G. Adapter with glass stopcock	1-M, 1-F	Z220248
H. Three-way adapter	2-M, 1-F	Z173320
HH. Three-way adapter, 750 angle	2-M, 1-F	Z167452
I. Reducing adapter	45/40F to 14/20M	Z220361

*Unless specified, all joint sizes are S.T. 14/20.

Caps

Description		Standard Taper Joint*	Cat. No.
J.	Female joint cap	F	Z173428
K.	Female joint cap	45/40F	Z220329
L.	Male joint cap	M	Z230855
M.	Hex head stopper	M	Z167576

*Unless specified, all joint sizes are S.T. 14/20.

Cold Traps, Columns and Condensers

Description		Standard Taper Joint*	Cat. No.
N.	Cold-trap for isothermic evaporation	2-F	Z220418
O.	Vigreux distilling column, 150mm long	1-M, 1-F	Z167517
P.	Liebig condenser, 100mm long	1-M, 1-F	Z167525

*Unless specified, all joint sizes are S.T. 14/20.

Flasks and Tubes

Description	Cap. (mL)	Standard Taper Joint*	Cat. No.
Q.	Reaction flask with glass stopcock on side-arm
	25	M	Z220264
	50	M	Z220280
	100	M	Z220302
R.	Reaction and storage flask, Kjeldahl, with glass stopcock on side-arm
	25	F	Z173231
	50	F	Z173258
	100	F	Z173266
S.	Solvent storage flask with glass stopcock on side-arm
	50	F	Z173061
	100	F	Z173088
	250	F	Z173096
T.	Reaction and storage tube with glass stopcock on side-arm
	25	F	Z173126
	50	F	Z173223
U.	Solid-transfer vessel for transferring and packaging air-sensitive solid compounds under inert atmosphere, has two side-arms with 14/20M joints and a gas inlet with glass stopcock
	75	3-M	Z220590
V.	Sealing tube for use with solid-transfer vessel
	15	F	Z220434
W.	Addition funnel with Rotaflo® stopcock, and glass stopcock on side-arm
	100	1-M, I-F	Z173495
X.	Filter funnel with drip-tip and two glass stopcocks, one on side-arm, frit porosity 25-50mm
	75	1-M, I-F	Z173185
Y.	Filter funnel with drip-tip and two side-arms each equipped with a glass stopcock, frit porosity 25-50mm
	100	1-M, I-F	Z220140
Z.	Low temperature filter funnel, lower outlet is bent to allow for immersion of entire unit into a Dewar bath, frit porosity 25-50mm
	75	1-M, I-F	Z173355
BB.	Double-ended filter with a glass stopcock on each of the two side-arms, frit porosity 25-50mm
	60	2-M	Z173479
CC.	Filter/Washer/Degasser has septum-inlet, drip-tip, and PTFE stopcocks on side-arm, female top joint and male bottom joint, frit porosity 25-50mm
	100	1-M, I-F	Z232289
DD.	Double-tube recrystallizers, frit porosity 25-50mm
		4-M	Z173363

*Unless specified, all joint sizes are S.T. 14/20.