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Topic: Two Phase Reaction in Flow Mode: Tube Reactor  (Read 2418 times)

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Offline curiouscat

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Two Phase Reaction in Flow Mode: Tube Reactor
« on: July 17, 2016, 12:38:01 AM »
I am wanting to test a two phase liquid reaction (aqueous & organic; densities 1.1 & 0.8) in flow mode i.e. inside a long tube approx. 10 mm dia. Is it necessary to put in static mixer elements or would just packing the tube with inert beads (glass / ceramic etc.) or some sort of inert packing do as well?

The fluids are corrosive & hence getting static mixer elements is expensive. Hastealloy & teflon are my only options.

As it is, getting static mixer elements for small dia tubes seems hard.  Can I compensate by just having high velocities i.e. Reynolds numbers and hoping that the resultant turbulence will get us mixing?

Any ideas on if this can work? If not, any other ideas?

Offline kriggy

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Re: Two Phase Reaction in Flow Mode: Tube Reactor
« Reply #1 on: July 19, 2016, 03:25:04 PM »
What about phase transfer catalyst? TBAF or similar

Offline curiouscat

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Re: Two Phase Reaction in Flow Mode: Tube Reactor
« Reply #2 on: July 19, 2016, 11:44:01 PM »
What about phase transfer catalyst? TBAF or similar

Would they survive  HCl & H2O2 at approx. 90 C? The reactive environment is rather harsh.

Offline phth

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Re: Two Phase Reaction in Flow Mode: Tube Reactor
« Reply #3 on: July 19, 2016, 11:56:40 PM »
You may want to think about using polyvinylsytene which is more resistant to dramatic pH; im pretty sure the HPLC grade stuff will fit your needs.  There's alot of literature about the degredation conditions of things of this nature including silica.  Depends on the concentration of acid/ox.  The material of the tube needs to be stable to those conditions.  Concentric motion can create stirring... injector port, middle. Particle size with a larger diameter will be better.  But why not just buy a plug flow reactor?

Offline kriggy

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Re: Two Phase Reaction in Flow Mode: Tube Reactor
« Reply #4 on: July 20, 2016, 10:13:24 AM »
What about phase transfer catalyst? TBAF or similar

Would they survive  HCl & H2O2 at approx. 90 C? The reactive environment is rather harsh.

Since its tributylamonium salt I think it surive HCl just fine. Im not sure about peroxide but I dont see any easily oxidizable groups so it could be OK too.

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