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teodor
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The most useful compound after 20% HF on my opinion is NH4HF2. Use the ammonia and you will still get something useful. But I would stay with HF.
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Radiums Lab
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Mood: Experiencing the elegance of science.
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Labcoatz recently posted his synthesis of fluorine gas using an easy method compared the the other electrolysis method(I think someone else pointed
about this in other threads too),
I don't want to make some fluorine now but I'll try that later(not in near future though). I can get 500 grams of KHF2 for 6 dollars (it's 99% pure).
290 degrees is a pretty attainable temparature too.
Water is dangerous if you don't know how to handle it, elemental fluorine (F₂) on the other hand is pretty tame if you know what you are doing.
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Sulaiman
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neutralising and disposing, plan A
After thinking it through, I'm not too keen on the CaCl2 option due to the HCl produced.
(55%HF = 32.4M, x500ml = 16.2 moles of HF converted to 16.2 moles of rust-generating HCl)
I'm considering agricultural grade Ca(OH)2 to produce the less soluble CaF2
which I could dispose of as solid waste to a landfill.
I have a few questions (Qn, where n>>3 but for now....)
(Q1= is this a sensible route?)
As calcium hydroxide is not very soluble I would:
. To a clean 45 litre black plastic bin (with lid) add a quantity of tap water
(Q2= how much water : more dilute = a calmer reaction but a greater volume to deal with)
. add the 500ml 55%HF to the water
. slowly add solid Ca(OH)2 until an excess has been added.
. evaporate by sunlight over days, with possibly a little added rainwater.
. collect, dry, contain the solid fluorite then send it to a landfill.
(Q3= any suggestions?)
[Edited on 18-3-2025 by Sulaiman]
CAUTION : Hobby Chemist, not Professional or even Amateur
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teodor
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I think there is a chance that reaction with Ca(OH)2 will not go to completion. This is just a safety remark. A constructive remark was given before.
[Edited on 18-3-2025 by teodor]
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bnull
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Neutralise it like @woelen suggested in page 2 and add an excess of calcium chloride. Then you can do whatever you please with it: collect the solid
and send to a landfill, give it a free toilet ride, store it for later, make a nice concrete block with it.
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Radiums Lab
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@Suliman I know a pretty old YouTube video where some university professors try to dissolve a bulb in HF , in the end of that video thy neutralise it
using sodium carbonate. But if you want insoluble salts then it's not useful in following the sodium carbonate method.
Here's a quick link to it:
https://m.youtube.com/watch?v=6ZBwluyR2Tc&pp=ygUKQnVsYiB...
[Edited on 18-3-2025 by Radiums Lab]
[Edited on 18-3-2025 by Radiums Lab]
Water is dangerous if you don't know how to handle it, elemental fluorine (F₂) on the other hand is pretty tame if you know what you are doing.
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