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Author: Subject: Made to order PTFE adapters
draculic acid69
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[*] posted on 20-3-2019 at 04:10


So I'm guessing that azalnaught was just a tease and all this post amounted to is a few pictures of teflon porn?
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Mr. Rogers
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[*] posted on 20-3-2019 at 04:26


Every time somebody pops in with this (non-novel) adapter idea, they just disappear.


!! ** POOF ** !!


When somebody can actually make these adapters, there's money here...

[Edited on 20-3-2019 by Mr. Rogers]
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MrHomeScientist
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[*] posted on 20-3-2019 at 06:50


Give the poor guy (girl?) a minute! He's a student and doing this in his free time, after all. The space between his previous two posts was 10 days, and it's only been 7 since the last one. I think the fact that he cranked out a prototype after his first post is a good sign.

I'd also be interested in a paint can distillation adapter. Looks like this Teflon business is an untapped gold mine!
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draculic acid69
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[*] posted on 20-3-2019 at 11:59


Last post was a month ago not 7 days
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draculic acid69
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[*] posted on 20-3-2019 at 12:11


Does the teflon fitting have to be the part that connects to the paint can lid.everyone wants this for distillation not reflux right? I'm thinking a brass threaded compression fitting attached to the lid with a hex flanged back nut on either side of the lid which has a copper or SS distillation neck which has a teflon stirrer bearing on the end that attaches to a condenser.

[Edited on 20-3-2019 by draculic acid69]

[Edited on 20-3-2019 by draculic acid69]

[Edited on 20-3-2019 by draculic acid69]
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MrHomeScientist
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[*] posted on 20-3-2019 at 12:56


Yikes, not sure what I was thinking there. Time to go home and rest...
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Mr. Rogers
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[*] posted on 20-3-2019 at 15:40


Quote: Originally posted by draculic acid69  
Does the teflon fitting have to be the part that connects to the paint can lid.everyone wants this for distillation not reflux right? I'm thinking a brass threaded compression fitting attached to the lid with a hex flanged back nut on either side of the lid which has a copper or SS distillation neck which has a teflon stirrer bearing on the end that attaches to a condenser.


Brass would be better, but the end goal is to ultimately connect this to glass, and a single piece of PTFE is probably the most achievable way of going about this.

The Kimble catalog actually has a "blank" which is a glass tube somehow attached to a metal tube made from some special alloy. It's designed for constructing the same type of devices we're discussing here. You'd need two different skill sets to effectively make use of this though.

[Edited on 20-3-2019 by Mr. Rogers]
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azulnaught
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[*] posted on 30-3-2019 at 13:18


I apologize for the delayed response and inattentiveness. I am currently at the height of the semester as far as workload. I will continue to be busy for the next few weeks but once they pass I will have more time to work on projects like this.

Here are some of the male threaded adapters (that can be used for a steel plate/paint can) to 24/40 taper joint with stainless lock nuts and nitrile gaskets. The gasket on the outside of the paint can shouldn't be needed if you wrap the threads with Teflon tape. The adapters may have some tooling marks but they shouldn't affect functionality.

24_40 to 0.5 npt-1.png - 7.5MB

I'm currently looking for a cheaper source for these stainless nuts in 304 and 316 to keep the price point low. I'm considering purchasing some Viton O-rings as an upgrade as they are compatible with a wider range of chemicals. Any suggestions or comments are appreciated.

As for the 2L to separatory conversion - I could make something but if the plastic cap is compatible then it would be easier to just drill a hole in the cap, install a metal barb fitting, outfit it with a compatible soft tubing, and use a pinch clamp to control/limit flow.
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Mr. Rogers
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[*] posted on 30-3-2019 at 22:13


Hey!! Good work!! We want these, so keep at it. You have an audience here that will buy these. I'm definitely in.

[Edited on 31-3-2019 by Mr. Rogers]
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draculic acid69
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[*] posted on 30-3-2019 at 23:21


I tried pretty much everything in regards to the coke bottle to SEP funnel idea.the metal barb is a weak point as corrosion is/will be a problem.the hose would be another one with soft rubber tubing being eaten by solvents and aquarium tube being too stiff or thick to pinch effectively .Pinching a tube to the point of being able to stop the gravitational flow (ie: leaking) of a liquid in adequate time and be able to effectively separate two liquid layers has not proven doable so far. It has to be a screw in/on teflon or pet stopcock/tap of some sort sort.everything else I've tried just isn't good enough.fresh ideas are welcome.

[Edited on 31-3-2019 by draculic acid69]
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Sulaiman
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[*] posted on 31-3-2019 at 01:10


Quote: Originally posted by azulnaught  
Here are some of the male threaded adapters ...


I would want a groove cut in the adapter to take a Keck clip,
and preferably a ptfe washer and nut.





CAUTION : Hobby Chemist, not Professional or even Amateur
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andy1988
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[*] posted on 31-3-2019 at 02:34


Quote: Originally posted by azulnaught  

I'm currently looking for a cheaper source for these stainless nuts in 304 and 316 to keep the price point low.


UK based ACCU, inexpensive international shipping & prices (tax is upwards of 25% for me though), good browsing interface. Wide variety of materials including PEEK, nylon, other metals, even black oxide on both 304 & 316.

EDIT: A bit more expensive & different variety including PTFE, US based McMaster.

[Edited on 31-3-2019 by andy1988]




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draculic acid69
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[*] posted on 31-3-2019 at 04:09


Andy 1988 what are you trying to suggest with the links in your post?
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[*] posted on 31-3-2019 at 04:37


Quote: Originally posted by draculic acid69  
Andy 1988 what are you trying to suggest with the links in your post?

Inexpensive chemical resistant nut supplier for the paint can (Accu's offline quotes aren't inexpensive in low quantities though). Sorry in the thread I became mixed up reading your post talking of metal corrosion, you were talking about a different thing.

[Edited on 31-3-2019 by andy1988]




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[*] posted on 31-3-2019 at 04:58


Very nice, azulnaught!



"Question everything generally thought to be obvious." - Dieter Rams
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Mr. Rogers
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[*] posted on 31-3-2019 at 10:23


Quote:
I would want a groove cut in the adapter to take a Keck clip,
and preferably a ptfe washer and nut.


Ideally, I would like this to be a two-piece deal, a PTFE adapter and nut, without the o-rings.

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Herr Haber
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[*] posted on 1-4-2019 at 03:43


Quote: Originally posted by Sulaiman  
Quote: Originally posted by azulnaught  
Here are some of the male threaded adapters ...


I would want a groove cut in the adapter to take a Keck clip,
and preferably a ptfe washer and nut.



I'd be interested in the same configuration with maybe a few extra Viton rings.
The topic smells of DCM and benzene !
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draculic acid69
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[*] posted on 4-4-2019 at 01:04


DCM, benzene and other destructive distillation products.
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