For questions about purification - the process of rendering something pure, clean of foreign or undesired elements. Not to be confused with [metallurgy] or [chromatography].
Questions tagged [purification]
207 questions
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How does alum improve the settling of particles to produce 'clean' water?
How does the addition of alum — potassium aluminium sulfate or $\ce{KAl(SO4)2}$ — help settle the dust particles in water?
There was such a statement in my Year 9 textbook, and so I was wondering how exactly alum does it.
Edit: I have posted an…
Yatharth Agarwal
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Why is kerosene being used in PUREX (plutonium uranium reduction extraction) as a solvent?
I am searching for a reason, why organic solvent in PUREX consists of 30% tributyl phosphate (TBP) in kerosene. Why kerosene (or another hydrocarbon)? What properties does it have? What exactly does kerosene do in the organic phase?
user132092
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3
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How does the production of pure, crystalline silicon happen via the Czochralsky process?
I have a few questions regarding the production of pure, crystalline silicon:
As far as I know Silicon usually appears in nature in the form of sand or $\ce{SiO2}$ and then is split apart and brought into the form $ \ce{Si + 2CO} $ ;
I am imagining…
Imago
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2
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Purification of the Hünig Base
My group uses a lot of Hünig base which needs to be dry and pure. The common procedure we use is to first distill from ninhydrin then from calcium chloride.
Apparently the problem is that Hünig base decomposes to give primary amines (which are…
James Dealon
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2
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1 answer
Best place to take off vacuum for distillation
I have seen vacuum take-off adapters that are essentially plugs, which could be placed at the top of a three-way above the fractionating column, and also straight and bent vacuum take-offs with an inner stem that seem meant to be placed right before…
Motomotes
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Purify gas produced after reactions with sulfuric acid
Say, I preheat 50ml of 98% $\ce{H2SO4}$ and proceed with adding 25ml of 85% $\ce{HCOOH}$.
The result of which is:
$$\ce{H2SO4 + HCOOH -> CO + H2O}$$
Sulfuric acid will dehydrate formic acid producing $\ce{CO}$, however, gas could still be…
Halo
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CO2 conversion to a harmless gas like oxygen
I am doing some research about indoor purifiers and I was wondering if there is any approach to purify co2 or convert it to harmless gases like oxygen just like what plants do.
Lala
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Purify ethanol from benzene
In reference to my previous question: Separation of methyl acrylate from ethanol
I have successfully get rid of acrid odor by treating ethanol with sodium hydroxide and filtering out the precipitate, but after distillation, there is "thinner" odor,…
Tom
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