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Dean-Stark Traps • Cold-Traps & Vacuum Traps
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Dean-Stark traps • Jacketed Dean-Stark trap • Modified Dean-Stark apparatus
Modified, jacketed Dean-Stark trap • "N"-tubes
Dean-Stark traps
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Designed specifically for azeotropic distillation using solvents lighter than water. Each Dean-Stark trap comes standard with a 4mm bore PTFE stopcock. The 12mL and 25mL traps use a 2mm bore stopcocks.
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Cap.
(mL)
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Height
(mm)
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Side-arm
clearance (mm)
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Suggested
flask size
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S.T. 14/20 Joints
Catalog Number
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S.T. 24/40 Joints
Catalog Number
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S.T. 29/32 Joints
Catalog Number
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12
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205
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80
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50mL - 5L
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-
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-
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25
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255
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80
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50mL - 5L
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-
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-
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25
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280
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80
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50mL - 5L
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-
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100
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350
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100
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5L - 12L
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-
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300
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440
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170
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22L - 50L
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-
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500
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455
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170
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22L - 50L
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-
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Jacketed Dean-Stark trap
 For azeotroping large amounts of water, 325mL capacity. With S.T. 24/40 joints and 4mm bore PTFE stopcock.
Z10,257-1
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Modified Dean-Stark apparatus
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The 8mL reservoir version is specifically designed for small scale azeotropic distillation of valuable solvents using heavy water. 2mm bore PTFE stopcock, 300mm overall height.
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The modified Dean-Stark technique
(See Fig. 1)
- Solvent vapors condense and collect in the receiver
- The modified Dean-Stark trap separates the two components
- The heavier than water layer sinks to the bottom of the trap leaving the water on top
- The solvent is forced back through the inside tube and returned to the boiling flask
- The upper water layer is drained out through the 2mm PTFE stopcock
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Reservoir cap. (mL)
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S.T. Joint 24/40
Catalog Number
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S.T. Joint 29/32
Catalog Number
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8
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35
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Modified, jacketed Dean-Stark trap
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350mL capacity. 0-3mm PTFE valve. 300mm overall height.
Z24,960-2 |
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"N"-tubes
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For small-scale distillation. 10mL capacity.
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Description
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Catalog Number
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| S.T. 19/38F, 24/40M joints |
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| S.T. 24/40 joints |
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