[AR] Re: Ion exchange resins for cleaning peroxide
- From: Peter Fairbrother <zenadsl6186@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Mon, 11 Jul 2016 15:23:12 +0100
On 11/07/16 11:59, Ben Brockert wrote:
Anyone have any quick references on it? My (possibly wrong)
understanding of it was that you can run HTP through an ion exchange
resin pack to remove the stabilizers that result from concentrating
lower percentages of stabilized peroxide. But that it is a somewhat
hazardous process, both from the chemical composition of the resin and
the usual reason that HTP shouldn't be run through a filter.
First, I have no practical experience of this whatsoever.
However, I wouldn't run HTP through a resin, fullstop.
Resins are, well, resins; the ones you might use are based on
polystyrene, and therefore they are just dandy fuels, with high surface
areas to boot.
To remove the stabiliser run it through _before_ concentrating, when
it's about 30% peroxide. That way an incident will be an ooops!, not a
Ka-Blooie!
It may or may not work depending on the stabiliser used. Strong type 1
cation exchange resins will remove stannates. Weak anion exchange resins
should remove pyrophosphates, nitrates, phosphates.
Both can be regenerated with 1M NaOH.
I think you would need strong type 1 anion exchange resins to remove
organophosphonates. That's just a guess though, I tried to look it up,
but couldn't find any references.
-- Peter Fairbrother
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