[AR] Re: Ion exchange resins for cleaning peroxide
- From: "John Dom" <johndom@xxxxxxxxx>
- To: <arocket@xxxxxxxxxxxxx>
- Date: Mon, 11 Jul 2016 17:36:42 +0200
Peter Fairbrother wrote on 110716:
Strong type 1 cation exchange resins will remove stannates.
I thought stannates are anions and a cation exchanger only removes only cations.
One could try a pouring the 30 % (preferably less) peroxide on a batch of
suspended ion exchanger cation beads while stirring. In a beaker for starters.
No columns, no pumps, no flow measurement only a stirred reservoir. Next, after
decanting, the same procedure using anion beads. May take a day. After
separation the probably botched resins are dumped, not regenerated. I tried all
this with solutions of organics but not with peroxide. The practical
installation was a 2 cubic meter column in the plant.
It worked.
Due to exchanger beads dissolving, swelling or cracking up eventually, the
deionized 30 % may become contaminated with exchanger debris and require
filtration (through glass or PTFE) prior to distillation. A brownish solution
may result, maybe not suitable for distilling.
The main problem with all this is how to measure the ppms of the stabilizer
impurities of choice before & after ion exchanger treatment without a
sophisticated analytical lab? AAS and ion chromatography instruments come
not cheap. Maybe a friend at a university or in industry?
What do Copenhagen Suborbitals ... and XSpace have to say?
jd
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