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Nitrox2
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What about adding a higher BP compound to the distillation flask?
In regards to distilling to dryness
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Cathoderay
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As far as outdoors vs. fumehood, it somewhat depends on the weather and what gases might come off the process. From your pictures it looks like you
live in a nice climate, (southern California I would guess) so outdoors would be fine, but if you want to do chemistry and it's winter in Boston that
would be a different matter. I wouldn't stand down wind anyway. Distilling alcohol would be pretty safe indoors with some fresh air but if distilling
nitric acid or making chlorine, bromine, hydrogen sulfide gas, etc. indoors you better have a fume hood (probably a gas mask also). So it depends on
what exactly you are doing.
By the way do you live in a house or in an apartment?
If an apartment you need to be extra careful, you could get into a lot of expensive legal problems if you damaged something or effected the neighbors.
On the subject of boiling to dryness and your valuable substance, no chemical process delivers 100% yield, some is always lost. You could evaporate to
dryness (low heat) OK.
You could dilute the substance with more solvent so that the little left in the flask will have less substance percentage wise.
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zed
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Utilizing oil baths, I have always failed. If you need high heat; a heating mantle is generally the best way to go.
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CuriousOnlooker
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Quote: Originally posted by Nitrox2  | What about adding a higher BP compound to the distillation flask?
In regards to distilling to dryness .. Hotplate surface is 3.9" |
I'm jumping into this conversation because, maybe I missed it, but I don't recall you saying what you were going to be doing, other than distillation
which could mean many things.
That's a very large jump from a test tube or bottle, which leads me back to my earlier query.
I wouldn't trust the brown bottle for any heating, other than warm.
You will do yourself a great service by getting the 500ml beaker.
When I've used a sand bath I like to have the sand extend ~0.3 of the way up the flask to ensure a larger heating area, however I use a round-bottomed
flask for such things and the curvature of the metal bowl closely matches the flask. Sand baths do take a long time to heat up, but that doesn't mean
they should be rushed as it will be too easy to over-heat.
Invest in a thermometer or infra-red temperature reader.
I would like to reiterate what a couple of others have said, namely:
@charley1957: "Boil water. Learn by doing."
@Cathoderay: "careful of burying the test tube or flask too far in the sand. You need to see what is going on, never boil something to dryness."
It will serve you well to do a test run with water.
Condemnant quo non intellegunt.
Never fire a warning shot. It is a waste of ammunition. ~ Hunter S. Thompson
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