stoichiometric_steve
National Hazard
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Registered: 14-12-2005
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Mood: satyric
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Help! Finding cheap flow chemistry reactor tube & accessories
Hey friends! I'm d(r)ipping my toes into flow chemisty and thus would require a few pieces of equipment for R&D while not spending too much money.
I'm pretty positive there are everyday things or lab equipment that can be repurposed to serve as building blocks for a flow setup.
Reactor
Of course there are commercially available reactors (like Diba Omnifit, Thalesnano CatCart etc.) but those are a bit expensive, if quite attractive
once the project is past a proof-of-concept stage.
The reactor would have to withstand a bit of pressure (less than 3 atm/45psi), be resistant to alcohols (and ideally Heptane and Toluene), have an
inner diameter of less than 10mm and length ideally around 100-150mm.
It should also be able to accomodate a frit or filter plate assembly (~25µm) on the inlet and outlet side to catch particles from the catalyst
packing.
I thought about repurposing e.g. a MN Chromabond SPE/Flash LC cartridge which has Luer Lock connectors, but the cartridges only come in packs of 50
for about 150 EUR. Someone got unused spares lying around? ![;)](./images/smilies/wink.gif)
![download.jpg - 5kB download.jpg - 5kB](http://www.sciencemadness.org/talk/files.php?pid=663452&aid=89634)
LC columns in general (especially ones that can be thermostated) like the XK50 from LKB/Pharmacia also look attractive, but they're hard to come by in
the dimensions i'm looking for.
A similar device could probably be made by modifying a HDPE/PE or glass syringe, but i'm unsure how to manufacture an end cap that replaces the
plunger and can handle a bit of pressure.
Maybe cutting off the conical ends on two centrifuge tubes and fusing the open ends together?
Another idea i had was using a thick-walled PTFE/Polyamide pipe with threaded ends for screwing on end caps (much like an inline filter cartridge),
but haven't had any luck finding anything. Of course a machine shop could put threads on a stock pipe and make the caps, but that's probably going to
be a bit more on the expensive side then.
Ultimately, thin-walled but rigid PTFE/PA tubing with compression fittings on each end would probably also work, while i'm not sure how to implement
the filter elements.
Pump
I do have a peristaltic pump, but it's probably not able to provide the flow rates (around 0.1ml/min) required.
A syringe pump would be attractive (Perfusor, Injectomat etc.) due to the pressure tolerant Luer Lock connections used on the syringes.
Any input and direction is highly appreciated. Have a great sunday!
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Triflic Acid
Hazard to Others
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Posts: 486
Registered: 27-9-2020
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Mood: Slowly Oxidizing into Oblivion
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Well, what are you making in flow?
There wasn't a fire, we just had an uncontrolled rapid oxidation event at the power plant.
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