Metal core catalysts

[Yggdrasil]

I will be offline most of the next month.
Then I will go to Mindanao and visit my in-laws and what comes there of.

In case of anything interesting or out of the ordinary just PM me.
TapaTalk will inform me

BR PoA

 

[Yggdrasil]

Hi
Back and refreshed now
Interesting things has happened in the lab while away
It seems that I have redissolved much of my powders by accident

I have what I call a reaction chamber.
Basically a polypropylene storage box with gasket on the lid.
To this I have added a aquarium air pump and a large outlet.
It function as my PM storage, storing my gold powder and PGM blacks in concentrated HCl.

But just before leaving for my vacation, I put in a beaker which was not finished leaching ( 500ml HCl and 20-25Ml HNO₃)
During my 3 weeks of absence the NOx gases had been picked up by the HCl and redissolved much of my powders.

Brain glitch, quite clear mistake in hindsight.
But there was also a small beaker which contained some catalyst pieces which had been test fused in Sodium bisulfate, before transferred to AR.
It obviously still had significant amount of Sodium bisulfate in it.
This beaker had soaked up a lot of extra liquid and overflowed.

Lesson learned, but no damage done :wink:
I was supposed to do a secondary refining anyway

BR PoA

 

[butcher]

Zinc not zink (That misspelling of the word bugs me, as I also have problems spelling zinc and nickel).

DMG will be beneficial here, in your testing tool box.

 

[Yggdrasil]

Hmm.
A long time ago and easy to do in my case ;-)
So I had to look it up again
I stand corrected and will edit when back in the house.
In my language we write zinc either as Sink or Zink.

Sent fra min SM-G950F via Tapatalk

 

[Yggdrasil]

DMG are in my toolbox.
I use it with IsoPropanol as recommended by forum members.

In this case it does not give the expected result.
IP or water give same result.

It works fine for Nickel though.

It is all in the thread with pictures and all.
And it have me quite puzzled, since the XRF says it has substantial amount of Pd.
But both Stannous and DMG give no indication of Pd.
Reread the thread and see the reactions.

BR PoA

 

[butcher]

I would trust DMG over an XRF.
That is if Pd was actually in the acidic solution (and not still in metal, or oxide form...)