Does any one have some info/links on fractional condensation?

Do you mean fractional distillation?

Do you not mean fractional distillation using a reflux condensor and fractional distillation column with a glass bead jacket???

Hmmm....

Lukky D

He could be looking for information on the condensor portion of the column alone.

What do you need to know about it?

some links would kick ass but, I'm trying to figure out if it has any plausable use in pulling water out of hard to seperate solutions like quite a few totse recurring acids and ethanol and such. Or maybe be used when boiling point of parts of solution are less than one degree apart.

So you are talking about Fraction Distillation

Do a search on that and you'll get lots of information

But it will work if there's a large difference in Bp's, but if its a small enuf difference, an Azietrop(sp?) is formed, meaning multiple liquids boil off at the same point which is different from eithers orig. Bp.

But to answer your question (which i forgot to oops) it wont help in distillation of an acid or base, or other solute from water(the solvent), but if you do a simple distillation, the water should pass as your distallate and the stuff left in the beaker should be the acid, or ethanol or what ever the solute is.

But if you can set it up correctly, and run a secondary cooling/heating source in the column you may be able to split up the azietrop



[This message has been edited by Random_Fool (edited 09-11-2003).]

All the links in the world aren't going to help you. How about you just lay out your specific problem and go from there?

For one no link is going to teach you more than a passing description of fractional distillation. Nor is any site going to tell you what you can do with it.

As far as seperating things with less than one degree difference in boiling point. Well You can't fractional distillation or otherwise. There is one method of doing separations like this and it involves a very expensive fractionating column called a spinning band column. It has a motor on it that spinns a twisted band inside it and it creates such a ratio that this separation is possible with some tweaking and preparation. Too bad no one here has ever seen such a column nevermind that none of us could afford one.

So basically you need to describe your problem cause the answer isn't in distillation. You need to get your formic acid or whatever another way.

Yours truly,

tryp

Well I'm really apreciatetive of the info and help but, the situation I'm talking about goes like this:

Solution X is a fair mix of distilled H20 and say somthing very usful like nitric acid, sulfuric acid or any of those hard to purify goodies.

Now if I throw solution X into a controlled enviorment where the temp is set at roughly the middle point between the two freezing points of the water and acid will I be able to drain the higher freezing point liquid out?

I keep hearing about freeze-drying being very useful for all kinds of hydrophyllic materials.

Set the temp. to the freezing point of the higher material, would in theory work; But, in reality when a substance dissolves into a solution, it decreases the Freezing point of the solution, so while you can get some of the acid out, most will freeze in solution. And as for draining the higher freezing point out, It will freeze first.