Lab Equipment: The Clevenger Apparatus
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- čas přidán 26. 07. 2018
- In this video we discuss the Clevenger Apparatus, a useful type of Dean-Stark apparatus that can be used in both light return and heavy return modes.
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The Dean Stark Apparatus: • Lab Equipment: Dean St...
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Hmmm... Any other apparatus you want me to go over? As long as it's not ludicrously expensive.
If there's anything super basic but absolutely necessary for amateur chemists that you haven't covered that'd be good, I think.
Great video
A video on introductory laboratory glass blowing would be cool. Maybe something relatively simple like adding a side arm to a round bottom flask, or an adapter out of some broken glassware.
How about a solid-phase synthesis flask, Schlenk flask, and/or photoreaction apparatus? This would make a super-interesting series of videos I think - obscure but useful chemistry equipment!
Schlenk flasks or schlenk line even
NurdRage how about some more DIY lab equipment videos?
Wait. Wait. Wait. You say "clevenger apparatus" makes you laugh because it sounds like a superhero porn star, yet you can say "stopcock" moments later without even a giggle. People, this is the difference between a serious chemist and an amateur porn star, I mean chemist.
I blow glass but have almost no chemistry background. it's great to see these running
Thank you for the apparatus series!
The Clevengers are taking on their most difficult opponent yet: the supervillain known as Stopcock!!
I wish someone would make a comic book based on the names from chemistry. This week... Clevenger vs the deadly salt creep.
Underrated comment. 👍
Stopcock does the lab boy after having an oil bath. Only the cold finger saved the flat bottomed flask from beiing vacuumed to death.
Maybe it's time to study arsoles a bit more: en.wikipedia.org/wiki/Arsole
interesting to see your dean stark model with drain. I'm working at a petrochemical lab where we use the dean-stark distillation to determine water content in residual fuels (ship fuel) but that model is way smaller (2ml capture area) and no drain port. Didn't even know there are other models around.
Shape is oddly reminiscent of a Thiele tube ^^ Literally never heard of this apparatus before you mentioned it. Thanks NurdRage!!
I love discovering your videos early, late at night
I have an unused Soxlet extractor and Dean Stark apparatus because of NurdRage's videos. Now I have to get a Clevenger Apparatus to look pretty in my pretty box of Deschem glassware products from China.
Wonder what kind of terps can be pulled with this?
I would love to see you distill lavender oil
Ive seen these before but never saw it in use. I always thought it was a dean stark apparatus with a piece of glass in the middle for support... Didn't realize it wasn't solid, haha. Thanks!!
I love this video thank you for this I hope for more equipment videos too.
Looks like you could also drill a hole and put a rising vent and tap on to bleed the lighter fluid for continuous operation, the bleed would angle up and it's exit would be higher than the feedback line
"Sounds like a hero superstar". I had a weird, silly feeling about that name; I'm glad you managed to translate it into words...
"Dean Stark" and his pronunciation style of "clevenger" seems appropriate to point out are similar to a famous DC comic franchise.
That was freaking NEAT!!!
Thank you
Nice glassware.
✨👍✨
Archimedes, Newton, NurdRage !
What a cool bit of glassware
So, the clevenger has a stopcock, huh.... strange super-power
They say that if you have lived a goodly life of strict lab safety you are rewarded by spending eternity talking about labware and with both nurdrage and nilered, each said to be cloaked in blinding white light.
I've also heard that if you're reckless you go to Utah where Cody makes you taste test various substances. There you will remain until you can correctly guess 4 in a row. No hints, no repeats.
Dean Stark, better known as Glass Man, is the brother of Tony Stark, and a member of the team of superheroes known as the Clevengers.
There is a guy called Brian Clevinger who writes a superhero type comic called "Atomic Robo" he also wrote a now ended web-comic called "8-bit Theater" and a book about superheros called Nuklear Age.
Really Nice!
Nurd! Could you please do a quick video on how to measure the viscosity of fluids? I am in need of this knowledge and it's hard to find any quality content about it. :(
caramba LP using an Ostwald viscometer? There are plenty of write ups about it online.
www.wikihow.com/Measure-Viscosity
what kind of fluids ? liquids/gases ? very viscous or not ?
poke hole in bottom of cup time how ling it takes to run out, compare to fluid of known viscosity.
I really like your videos on the different glassware components, do you have or know of a discussion group for like minded people who might have different levels of knowledge to meet up?
i like these types of videos too
Ever tried to buy from aliexpress? The glassware there is cheaper, down side is that shipping may take 30-60 days. Only took less than a week for mine though, since I only live in the Philippines
Would it be a good idea to add another output on the side of the collecting tube, so that you can drain the light phase (continuously, even) without having to drain the heavy phase first?
Cody sent me.
i use a clevenger in my essential oil distillation setup preceded by a barbed distillation column eliminating the chance my steam chamber runs dry (i use a modified pressure cooker for the chamber).
Would a good way to get the heavy phase out to have a small tap just above the entrance to the lower return arm that way when it reaches equilibrium the lighter phase can be drained off without disturbing the equilibrium
I wonder if there is any version of this that enables you to use a Cow Adaptor to separate the phases - easier then switching out beakers
If you put an additional stopcock on a return tube connected to the bottom of the apparatus, you will have an apparatus that both has a dual light/heavy return mode just like the apparatus with the return tube at the middle, only with an advantage that you don't have to watch over it in heavy return mode.
It's been a very long time since I did any lampwork, but I'd guess it's not entirely trivial to make such a gizmo. I'd also be concerned about getting the hole in it plugged up, and speaking of which, it might not be entirely trivial to clean. Maybe a PTFE stopcock with a wide hole bored into it and held on with a clamp...
@@davidfetter I don't expect it to be trivial, you would need a decent glassblower to do it. You need to get the same looking apparatus as Clevenger, only with a stopcock integrated on a heavy return tube. I would use at least 2.5mm bore PTFE stopcock, ideally 4mm. Cleaning shouldn't be more difficult than typical Clevenger, trivial for most labwork, but essential oils could probably be more difficult to clean. Seen its sketch in a book, hasn't made one as we have both light and heavy return apparatuses.
If you barely let a trickle of the heavy phase through and allow the distillation to occur, would that be a viable way to allow a you to completely distill a solution while also being able to separate both the light and heavy phase of materials?
Without buying to much equipment, what is the best join size to start standardizing with?
...I read the 24/40? Thanks!
nice that´s just perfect
2:24 nice rig setup
A dual-use Clevenger can be obtained which has the return tube at the base of the trap (for heavy return mode) but has a stopcock on the return tube (for light return mode. Shouldn't be that much more expensive.
exciting
please explain chittick apparatus for comparison of effervesent granules
Always remember folks, was this apparatus in an ice bath. Because Clevenge is a dish best serviced cold!
Groooooan. :*
Can bismuth be retrieved from dyes, or the medicine using bismuth subsilicate?
Nice device.
How on earth do they make such complex pieces of glassware?
I've always heard these called Dean-stark trap/apparatus
I have been always wondering what the side tube was for , those glasswares are surprisingly cheap on Alibaba (range from $20-40)
Sigma-Aldrich are goddamn thieves with their pricing.
Yeah but the Sigma-Aldrich ones won't explode under pressure. Who knows if the Alibaba ones are made up to the required standards.
The glassware from China is usually worse especially if the price is that low.
Homo Sapiens glasswares like those have to be made manually, since even the skilled workers in China only makes around $5 per hour , the low price can be possible without severe quality concerns
Kain Yusanagi When you're working in a lab, where the safety of an entire staff, and potentially an entire building of college kids, are at stake, you've got to use high quality gear with traceability. A lab is a dangerous enough place to add another variability of safety. They don't price their gear for the person doing stuff in their garage. Also, the price that is visible to you and me is not the price that research institutions pay. They have separate accounts where they get discounts for buying 10-1000 units at a time.
Why we must use water as solvent in the clevenger method? Why we can't use alcohol as sovenlt??
Ive seen other CZcamsrs put referral links to equipment they use in the video so that viewers can find it easily. Additionally the CZcamsr gets a cut from any purchases made through the link. You ever consider doing that?
As soon as someone gives me a cut, sure.
NerdRage is Canadian confirmed! 2:00
It looks like it needs a second drain to the right just above the return to collect the light fraction.
The expensive models have that.
The name of this device makes me think when the inventor put this together someone in the lab said 'That's clever what do you call it?' but I'm easily amused.
I have a Layboy brand dean stark trap. :)
If this apparatus had a stopcock on the middle glass piece, it could operate as both a clevenger apparatus (when opened) and a dean-stark apparatus (when closed), right? That would be neat!
I doubt im the firat to think of that, so it probably exists.
Yes. It is just more expensive
Where can I acquire a Clevenger apparatus?
Sir is dean and stark and clevenger apparatus both are same?
Is there a reason why there couldn't be a second stopcock just above the level of equilibrium to remove the light phase without having to remove the heavy?
Not really except for the trapped liquids in the stopcocks and side arms. I expect such a trap with two exits has been custom made or may even have a name.
Thank you.
There is, the expensive $600+ one.
It might be possible with some of the standard lab gear. Chek out - www.google.com/search?q=simultaneous+distillation+and+extraction&tbm=isch
I never even heard of that apparatus
If one have a PHD in Chemistry and doing chemistry in ones home lab…is one still a amateur chemist?
Once upon a time i'd have rushed off to ebay to buy one.
good ol' deschem or ben0315 or someone will have them.
I Dean-Starked myself to death with at least eight such units during my oil-and-gas core analysis days. 😄
For removing Ethyl Octanoate, What technique or Lab Equipment would you recommend me?
cara buat kristal
good demo. it leaves me not knowing how pure either phase is. why did you not address that topic ?
many of us here in u-tube land are chemists too or chem. engr's and versed in Raoults 'n Daltons laws
as applies to distillation of a binary (or more) mixture. briefly ... when you distlll anything but a pure
solvent the vapors are not the same mix ratio as in the original solution.
the purifying process has you distilll the condensed vapors a number of times. and those who have
one use a gas chromatograph device to identify the final liquid composition by area fraction %'s.
this GC step tells you if your product is meeting purity spec's or not.
because that's specific to each mixture.
Stopcock is my superhero name.
Is he from india?
Yeah, I Dean-Starked myself to death with at least eight such units during my oil-and-gas core analysis days. 😄
Coloured liquids, multiple tubes of ~Stuff~.
Use of Science confirmed.
"Almost impossible to understand" was a bit harsh... We've been watching your videos for years now
Wasn't better if you buyed the clevenger with the tube in the bottom? You already have a Dean Stark apparatus, so why buy this new one, instead of the other that will need less labor
Probably for demonstration purposes. Otherwise, I was thinking the same thing.
A superhero porn star with a stopcock. Probably the best piece of equipment used yet.
God, glassware is so expensive. Probably be cheaper to just take a course in glassblowing and make it yourself...
_super hero porn star_
Mr. Shortpath.....I don’t feel too good....
For some reason I feel like this is pronounced cleven-ger, instead if cle-venger
"Cleve[nge]r girl..."
_REEEEEEEEEEEEEEEE_
How 2 italics
Alex Wong
Put a "_" before and after the words you want italicized.
"_REEEEEEEEEEEEEE!_" without quote marks becomes _REEEEEEEEEEEEEE!_
You can also *bold* or -strikeout- like this with "*" and "-" characters respectively. Mix and match for effects.
"_Welcome to Jurassic "-Park-" "*World!*_""
_Welcome to Jurassic __-Park-__ _*_World!_*
Also, please, for the love of god, spell out your words and put in punctuation.
_Thank you_
-Thank you-
*Thank you*
_really?_ -no- *YES!*
Since my name is clevenger do I get one for free
nitrogenth
Astateenth.
Looks like a bong piece
why the dislike ,do some people just do it to be a prick
Is lab equipment like porn for chemists ?
Yes. I could go into more detail but this isn't the place. :?
WHY THE HECK ARE THESE SO EXPENSIVE
Damn I'm early
haha ... stopcock ... haha
"Herbalist" 😜
How do i smoke weed whit this
Sebastian yañez You can’t smoke with it, but you can make moonshine with it.
Just boof the weed. #JustBoofIt
First Comrade
961st !!
My name is Clevenger Apparatus and I find this offensive.
Moist as mayonnaise!
Like #666 🤘🏿
Hi
You are pronouncing Clevenger incorrectly. the accent goes on the first syllable. I should know as that has been my name for over 58 years.
First :)
So far it looks like chemistry is just a lot of distillation and stirring
pretty much.
This is coming way out of left field but whats a good method for obtaining powdered iron, or any metal for that matter. Physically separating it seems like a daft approach, is there a chemical reaction I can exploit to achieve this? Preferably in mass quantity.