lysander
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Low-flow reaction feeder
I need some means of feeding an aqueous solution into a reaction vessel at a very slow rate: like 500mL/hour.
What sort of mechanisms or devices might be suited to this?
The best I can come up with right now is to take a direct drip tube and repeatedly heat and compress its tip until I find a sufficiently low flow
rate.
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Magpie
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Take a look at this peristaltic pump:
http://www.sciencemadness.org/talk/viewthread.php?tid=59870#...
http://youtu.be/jZZXV3DuTc4
The control circuit is the one shown at this website:
http://www.electronics-tutorials.ws/blog/pulse-width-modulat...
If you have any questions let me know.
[Edited on 16-1-2016 by Magpie]
[Edited on 16-1-2016 by Magpie]
The single most important condition for a successful synthesis is good mixing - Nicodem
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lysander
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That's very clever: Just use a screw clamp to control the output of a low-voltage peristaltic pump!
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XeonTheMGPony
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why not an addition funnel? pack the tip with cleaned fiber glass then fine tune the flow with the stop cock?
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Bert
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Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
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From personal experience, a throttled down 500 ml addition funnel will vary rate quite a bit due to reduced head pressure as it empties-
There were made "constant addition funnels", the are heinously expensive and quite fragile. I would go with a pump/controller, if you have the option.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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