I'm a chemistry novice (just do it on my spare time, for fun), but this is the first I've heard of using celite/DE padding with a porcelain buchner funnel w/ filter paper. Seems to me that celite padding is usually used with buchner funnels w/ fritted discs. I use it when I have a solution that contains activated carbon that needs to be filtered, as well as other impurities that the fritted disc would catch. The celite pad prevents the activated carbon powder from getting stuck in the fritted disc. (This is much faster than removing the carbon with a buchner funnel w/ filter paper, followed up by another filtration using a fritted disc). Thanks for the upload! Great video. Nice and simple.
@@thedude6736 Since when? Everywhere I have seen calls fritted glass funnels buchner as well. They are just called Glass Fritted Buchners, or Buchner, Fritted Glass. But the word Buchner is almost always included
@@vancouverguy2533 Hm, we call these just "frits". Seem like my definition ist not that valid. I guess we do it that way just to be able to differentiate and because the original Büchner funnel from back in the old days was made from porcelaine. ;-)
Have you noticed a very fine particulate getting suspended in the solution from the celite? I can only see it with the right intensity flash light or maybe a laser. This suspension never seems to bottom out and ever since using this through a fritted filter, I get this suspension in any solution that goes through the filter now. I can also see some of the silicon dioxide around the edge of the frit and it does not want to budge from normal cleaning. I'm trying to figure out the best way to clean it properly but I haven't had any luck yet. I'm thinking I may need a dilute solution of sodium hydroxide at just the right concentration to dissolve and potentially loosen the the SiO2 without damaging the frit.
Yeah I’ve used food grade before and it’s too small I think. The filtering was very very slow. And that was after running through paper first. But it sure polished up the extract.
I have a question that doesn’t have anything to do with filtration, but I hope I could get an answer. When do I have to use a reflux condenser. I know that we have to see the bp of solvent, but in some cases it doesn’t really mater. I cooked last week something in DMSO for 22 h and I didn’t use one, then I cooked in DMF for 6 h and I had to use one, Why ? Thank u in advance :)
@@Penguinprof Is this because of the waste oil interaction with the DE, something to do with the size of the contaminant particles, the general breakdown of oil molecules, or something else? Thanks
Make a slurry with your celite, and solvent. Seat the filter paper in the funnel with a small volume of solvent, and vacuum. Then pour the slurry on top, and form a solid cake. Do not let the cake dry out or crack. Carefully pour your solution to be filter on top the cake without disturbing the cake. If done correctly, you will get a clean filtration.
@@threezerol944t I know I'm a little late it's been 2 years but one way to do it would be the first seat the filter paper then make your slurry and while the vacuum is running poor the slurry on top of the filter paper one additional step that I do is I put cotton pads on top of the sea light back in the buffer when I pour so that I do not disturb the celite
Ethyl acetate on its own is not that harmful . If there is something harmful dissolved in it, it's adviseable to wear gloves just forprotection from splashes. If something gets on your glove, remove the glove immediately, since most organic solvents will penetrate the glove within 5 seconds or less. This means, the solvent will also carry the solute into your glove! However, wearing gloves all the time is very bad for your skin and may even cause allergies. If the risk is small (harmless substances), for a step like this it's sensible not to wear gloves.
please don´t use the term Celite... I´ve been looking for ages what the heck that stuff is (or how its written) only to find out it´s DE...which I have a metric crapton of lying around...😅
very helpful i figuring out how to use this in my process for what im doing. very clear very easy .thank you
Very clear, very helpful. Thank you!
Glad it was helpful!
I'm a chemistry novice (just do it on my spare time, for fun), but this is the first I've heard of using celite/DE padding with a porcelain buchner funnel w/ filter paper. Seems to me that celite padding is usually used with buchner funnels w/ fritted discs.
I use it when I have a solution that contains activated carbon that needs to be filtered, as well as other impurities that the fritted disc would catch. The celite pad prevents the activated carbon powder from getting stuck in the fritted disc. (This is much faster than removing the carbon with a buchner funnel w/ filter paper, followed up by another filtration using a fritted disc).
Thanks for the upload! Great video. Nice and simple.
You're right. However, it's only a "Büchner funnel", if it has holes in it and no fitted glas frit. ;)
@@thedude6736 Since when? Everywhere I have seen calls fritted glass funnels buchner as well. They are just called Glass Fritted Buchners, or Buchner, Fritted Glass. But the word Buchner is almost always included
@@vancouverguy2533 Hm, we call these just "frits". Seem like my definition ist not that valid. I guess we do it that way just to be able to differentiate and because the original Büchner funnel from back in the old days was made from porcelaine. ;-)
This is lovely! Thanks for making such a great video :)
Glad you found it useful!
Have you noticed a very fine particulate getting suspended in the solution from the celite? I can only see it with the right intensity flash light or maybe a laser. This suspension never seems to bottom out and ever since using this through a fritted filter, I get this suspension in any solution that goes through the filter now. I can also see some of the silicon dioxide around the edge of the frit and it does not want to budge from normal cleaning. I'm trying to figure out the best way to clean it properly but I haven't had any luck yet. I'm thinking I may need a dilute solution of sodium hydroxide at just the right concentration to dissolve and potentially loosen the the SiO2 without damaging the frit.
thank you prof. penguin for your video :) really helpful for me
Glad it helped! Thanks for watching!
Does it work with any solvent including water ?
I've got good quality DE but the pad always cracks after vacuuming when I use water
Broh we are with you ❤
❤️
Why did the celite pass through the filter paper?
What is the pore size of the filter paper? please let me know
wish you'd of covered the d-earth size range to use ... coarse to medium to small ...
Yeah I’ve used food grade before and it’s too small I think. The filtering was very very slow. And that was after running through paper first. But it sure polished up the extract.
I have a question that doesn’t have anything to do with filtration, but I hope I could get an answer. When do I have to use a reflux condenser. I know that we have to see the bp of solvent, but in some cases it doesn’t really mater. I cooked last week something in DMSO for 22 h and I didn’t use one, then I cooked in DMF for 6 h and I had to use one, Why ?
Thank u in advance :)
I forgot to mention that both were cooked at 60 grade Celsius
Amazing
Thanks!
Is there a difference between the celite i would buy from a lab supply and the diatomaceous earth I would get from the garden store?
🐧🐧🐧🐧🐧🐧🐧🐧🐧🐧🐧
Can this filter the waste motor oil ?
Nope.
@@Penguinprof Is this because of the waste oil interaction with the DE, something to do with the size of the contaminant particles, the general breakdown of oil molecules, or something else? Thanks
side note: add a catch filter flask to this system so you don't accidentally suck solvent into the house vacuum system.
so mixing 190 or 200 proof ethanol in the celite is ok?
What size should the filter paper be?
The same inside diameter as the Büchner funnel. No climbing on the walls.
Make a slurry. Doing it this way will unseat the filter and get DE in you filtrate.
as in, mix the celite and to be filtered material together, mixing with solvent and filtering all at once?
Make a slurry with your celite, and solvent. Seat the filter paper in the funnel with a small volume of solvent, and vacuum. Then pour the slurry on top, and form a solid cake. Do not let the cake dry out or crack. Carefully pour your solution to be filter on top the cake without disturbing the cake. If done correctly, you will get a clean filtration.
I see.. the same sort of "slurry" idea used in column chromatography. Thank you.
@@threezerol944t I know I'm a little late it's been 2 years but one way to do it would be the first seat the filter paper then make your slurry and while the vacuum is running poor the slurry on top of the filter paper one additional step that I do is I put cotton pads on top of the sea light back in the buffer when I pour so that I do not disturb the celite
Thanks prof ! What about safety gloves? :)
Ethyl acetate on its own is not that harmful . If there is something harmful dissolved in it, it's adviseable to wear gloves just forprotection from splashes. If something gets on your glove, remove the glove immediately, since most organic solvents will penetrate the glove within 5 seconds or less. This means, the solvent will also carry the solute into your glove! However, wearing gloves all the time is very bad for your skin and may even cause allergies. If the risk is small (harmless substances), for a step like this it's sensible not to wear gloves.
Ok good
OK thanks!
please don´t use the term Celite...
I´ve been looking for ages what the heck that stuff is (or how its written) only to find out it´s DE...which I have a metric crapton of lying around...😅