Triflic Acid
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Preparation of platinized silica gel beads
I'm finally doing something I've wanted to do for a long time, buy a 1 gram bar of platinum. My plan is to convert some of this, maybe 0.1 grams, into
a platinum on silica catalyst for some flow chemistry experiments following this prep. Generally, hydrazine sulfate is used as the reducing agent, but I don't have that rn. Could I get away with using formaldehyde solution,
since I have a good amount of paraformaldehyde? Also, I'm using silica gel instead of silica wool, since it is easier to separate beads of silica then
tiny wicks.. There shouldn't be too much of a difference, right?
There wasn't a fire, we just had an uncontrolled rapid oxidation event at the power plant.
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wg48temp9
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Generally silica wool refers to fused quartz which is a silicon dioxide glass.
Silica gel is an amorphous and porous form of silicon dioxide that can absorb liquids which can cause it to crack and shatter. It is not as stable as
quartz glass.
I am wg48 but not on my usual pc hence the temp handle.
Thank goodness for Fleming and the fungi.
Old codger' lives matters, wear a mask and help save them.
Be aware of demagoguery, keep your frontal lobes fully engaged.
I don't know who invented mRNA vaccines but they should get a fancy medal and I hope they made a shed load of money from it.
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macckone
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clay based raschig rings make a good support material.
for silica wool, you could use fiberglass building insulation that has been rinsed to remove any binder.
The binder is usually sodium silicate. When exposed to the air for a long time it converts to silica and sodium carbonate.
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zed
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Well first, that Platinum will need to be converted to Chloroplatinic Acid via Aqua Regia. NurdRage does a good job of that..
Then you wan't to deposit metallic Platinum on your substrate, via a reducing agent.
Got no Hydrazine? You could make some. I like to use NaBH4 as the reducing agent. Great if you have some. It doesn't take very much.
You could probably use Formaldehyde. Maybe, even Ascorbic Acid.
[Edited on 24-6-2021 by zed]
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rockyit98
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kaowool is good since glass fiber tend to melt if you try to make nitric acid by oxidizing ammonia , also ZrO2 wool is available. i don't know for
sure but carbon fiber should also work (not for nitric acid preparation I think) as support for day to day reductions . nickel powder or Mu-metal
(from sanding down HDD disk magnet shield) powder can be coated with Pt at acidic conditions to make easy to separate magnetic catalyst powders for
hydrogenations .
"A mind is a terrible thing to lose"-Meisner
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Triflic Acid
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But I kind of liked the silica beads, given that they are separate. Will they reduce the catalytic activity?
There wasn't a fire, we just had an uncontrolled rapid oxidation event at the power plant.
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rockyit98
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even SilicaGels have high surface area for liquids (eg water will get suck up due to Contact angle ~0°) they have poor contact with gases. my advice
is not to use silicagel.
"A mind is a terrible thing to lose"-Meisner
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Triflic Acid
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Ok, got it.
There wasn't a fire, we just had an uncontrolled rapid oxidation event at the power plant.
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WGTR
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Here is a thread/posts for your viewing enjoyment:
https://www.sciencemadness.org/whisper/viewthread.php?tid=84...
https://www.sciencemadness.org/whisper/viewthread.php?tid=84...
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