Separation by STEAM DISTILLATIONS

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Separation bySTEAM DISTILLATIONS

• Set up is similar to Simple Distillations.

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The b.p. is the temp at which the vapor pressure
equals the atmospheric pressure.
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The b.p. (green) would be very high . . .
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If insobl, their v.p.s are added together . . .
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Therefore, no need for a thermometer!
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Set up by a water outlet . . .Start setting up
with a suitable ring stand.TIGHTEN THE RODso
your set-up doesnt WOBBLE!!
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Place the burner on the ring stand next.
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Then, add the iron ring, leaving 2-3 inches for
the flame.
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The wire gauze goes on top of the iron ring.
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Your LARGEST flask is clamped directly on top of
the wire gauze. Leave NO air space!
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Put your mixture into the pot BEFORE you assemble
the apparatus.
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The 3-way adapter (still head) is added atop the
RB flask.
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Use the glass stopper instead of the thermometer
assembly
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The condenser is CLAMPED to another
ringstand!Water enters the LOWER end.
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An Erlenmeyer flask in an Ice water slurry is the
receiver.

• DONT TRY TO HOLD IT WITH YOUR FINGERS!
• IT WILL BE VERY, VERY HOT!!
• Try clamping it.

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With a good hot flame, distill the benzoic
acid-pdb mixture as directed in your lab manual.

• Conduct the clogged condenser drill soon after
  solid begins to collect in the receiver.

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Once again, using a hot plate is an option.
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1)How can you tell when distillation is
complete?2) Collect the components SEPARATELY
on Buchner w/ suction.3) Do NOT leave the
volatile component open to air-dry.4)
Prepare your Reports and your products to
turn in at your NEXT LAB.

• I will call for your notebooks NEXT week, written
  through STM DISTN.