Distillation and distillation systems

[Chemtrail]

Thinking buying these cheap 3.5 cmf single stage $50 vacuum pumps from Amazon and just replace if goes out

These cheap vacuum pumps we're having an effective distillation help of vacuum distilling precious safrole allylbenzene, ketones, freebase amines, no ???

 

[G.Patton]

I can't answer you because I have no idea about what pump you're talking about. Apply its characteristics or link.

 

[mycelium]

Nope, they don't get low enough for distilling . They kind of work for vac ovens, and when it's done, ya throw it in the gutter, and go buy another.
With vac distillation, it is working for longer periods of time at a lot more vacuum, you don't want it to shit the bed in the middle of work.

Just Better Industries. 6 CFM 2 Stage Deep Vacuum Pump is the best generic pump with no green tax like some products.

DV-6E ELIMINATOR Vacuum Pump - JB Industries

6 CFM ELIMINATOR Vacuum Pump and oil

www.jbind.com

Check out the reviews, and my homeboy said they have it on scamazon

 

[Chemtrail]

Very good point. It would be tragic to lose hundreds $$ and MD amphetamine doses !

Swim got some homework to do

 

[Chemtrail]

Very good point. It would be tragic to lose hundreds $$ and MD amphetamine doses !

Swim got some homework to do

 

[Chemtrail]

Hey. Ok I see.

Of those $50 rotary vacuum pumps I mentioned, what would be the "average measurement of vacuum" those would achieve ??

 

[Chemtrail]

Uncle Fester

Calibrating the Vacuum

 

[Chemtrail]

A pic of a rotary vane vacuum pump capable of lowering the pressure to 20mmHg
Lowering the boiling point of aniline from 184C to 72C

 

[Jordan Belfort]

buy 25 micron pumps aliexpress 14 cfm

 

[Chemtrail]

Info about different types of vacuum pumps

 

[Chemtrail]

Strikes 2 cents on distillation

GREAT INFORMATION ESPECIALLY FOR PEOPLE GETTING STARTED IN THIS ENTERPRISE

* And an extra additional page about refluxing

 

[Chemtrail]

A YouTuber name Chemdelic was able to vacuum distill benzaldehyde pretty good with a single stage, 3.5 CFM Rotary vacuum pump

 

[Chemtrail]

Great info about vacuum pumps

Credit goes to Jack B. Nimble

 

[prvnc]

Distillation separates liquid mixtures by evaporation and condensation, using heat to vaporize components and cool to collect purified fractions. Simple distillation removes impurities or separates liquids with significantly different boiling points, while fractional distillation separates closer-boiling mixtures using fractionating columns. Vacuum distillation lowers pressure to distill heat-sensitive compounds safely. Key equipment includes a heated flask, condenser (e.g., Liebig or Allihn), and receiving flask. Proper setup avoids leaks and bumping, ensuring safety and efficiency. Distillation is widely applied in labs, industry, pharmaceuticals, and food processing for purification and solvent recovery.

 

[Chemtrail]

Approximate Boiling Points °C at reduced pressures
*a chart*

A good vacuum less than 50 mmHg could boil water at room temperature ~35 C

 

[Chemtrail]

Zubrick on Vacuum Distillation

Vacuum Distillation Notes

1. Read ALL the notes on class 1.

2. The thermometer can be replaced by a gas inlet tube. It has a long, fine
capillary at one end (Fig. 74). This is to help stop the extremely bad
bumping that goes along with vacuum distillations. The fine stream of
bubbles through the liquid produces the same results as a boiling stone.
Boiling stones are useless, since all the adsorbed air is wisked away by the
vacuum and the nucleating cavities plug up with liquid. The fine capillary
does not let in a lot of air, so we are doing a vacuum distillation anyway.
Would you be happier if I called it a reduced pressure distillation? An
inert gas (nitrogen?) may be let in if the compounds decompose in air.

3. If you can get a magnetic stirrer and magnetic stirring bar you
won't have to use the gas inlet tube approach. Put a magnetic stirring bar
in the flask with the material you want to vacuum distill. Use a heating
mantle to heat the flask and put the magnetic stirrer under the mantle.
When you turn the stirrer on, a magnet in the stirrer spins, and the
stirring bar (a Teflon-coated magnet) spins. Admittedly, stirring
through a heating mantle is not easy, but it can be done. Stirring the
liquid also stops the bumping.

Remember, first the stirring, then the vacuum, THEN the heat-
or WOOSH! Got it?

Remember, first the stirring, then the vacuum, THEN the heat-
Or WOOSH! Got it?

Remember, first the stirring, then the vacuum, THEN the heat-
or WOOSH! Got it?

4. Control of heating is extremely critical. I don't know how to shout this
loudly enough on paper. Always apply the vacuum first and watch the
setup for awhile. Air dissolved or trapped in your sample or a highly
volatile leftover (maybe ethyl ether from a previous extraction) can come
flying out of the flask without the heat. If you heated such a setup a bit
and then applied the vacuum, your sample would blow all over, possibly
right into the receiving flask. Wait for the contents of the distilling flask
to calm down before you start the distillation.

5. If you know you have low-boiling material in your compound, think
about distilling it at atmospheric pressure first. If, say, half the liquid you
want to vacuum distill is ethyl ether from an extraction, consider doing a
simple distillation to get rid of the ether. Then the ether (or any other
low-boiling compound) won't be around to cause trouble during the vac-
uum distillation. If you distill first at 1 atm, let the flask cool BEFOREyou
apply the vacuum. Otherwise your compound will fly all over and proba-
bly will wind up, undistilled and impure, in your receiving flask.

6. Grease all joints, no matter what (see "Greasing the Joints"). Under
vacuum, it is easy for any material to work its way into the joints and turn
into concrete, and the joints will never, ever come apart again.

7. The vacuum adapter is connected to a vacuum source, either a vac-
uum pump or a water aspirator. Real live vacuum pumps are expen-
sive and rare and not usually found in the undergraduate organic labora-
tory. If you can get to use one, that's excellent. See your instructor for the
details. The water aspirator is used lots, so read up on it.

8. During a vacuum distillation, it is not unusual to collect apure compound
over a 10-20°C temperature range. If you don't believe it, you haven't
ever done a vacuum distillation. It has to do with pressure changes
throughout the distillation because the setup is far from perfect. Al-
though a vacuum distillation is not difficult, it requires peace of mind,
large quantities of patience, and a soundproof room to scream in so as not
to disturb others.

9. A Claisen adapter in the distilling flask allows temperature readings to
be taken and can help stop your compound from splashing over into the
distillation receiver (Fig. 78). Also, you could use a three-neck flask
(Fig. 79). Think! And, of course, use some glassware too.