Problems in platinum recovery

[Yggdrasil]

What is the point of waiting for smb gases if you are going to precipitate it with copper anyway?
As long as you use good PPE

The SMB will drop most if not all the Gold.
It will however still contain minute amounts of Gold and most of the PGMs.
This will be cemented out with Copper.
This will be processed later.
I have not heard that the SO₂ could cause trouble though.

 

[Abdoulapapatte]

Je suis fasciné par votre explication, merci beaucoup. Je pense que votre Pt ne suit jamais le nitrique car la quantité d'argent n'est pas 10 fois supérieure à celle du platine.
Normalement, j'utilise du métabisulfite de sodium pour précipiter l'or au lieu du sulfate de fer, je suppose que cela n'affectera pas de manière significative le résultat. mais qu'en pensez-vous ?
J'ai vu que la méthode que vous utilisez pour récupérer l'argent est électrolytique. J'ai une cellule électrolytique pour récupérer l'argent, mais nous y faisons plusieurs récupérations et lorsque j'extrais des PGM, j'aime faire chaque lot individuellement, je ne voudrais pas mettre ces liquides là où nous mettons le reste et je préfère les traiter individuellement. Donc, la méthode que j'utiliserai pour séparer Ag et Pd dans un seul lot serait NaCl ou HCl au liquide après le HNO3. J'aimerais savoir si, lorsque nous ajoutons NaCl ou HCl au liquide, Pd et Ag coprécipitent ou si c'est sélectif pour Ag uniquement. Parce qu'à une occasion, cela m'a posé des problèmes. J'ai essayé de les séparer et il n'y avait plus de Pd dans le liquide et l'AgCl avait une teinte rose. Je pense que j'ai résolu le problème en rajoutant du HNO3 au précipité. J'aimerais en discuter si quelqu'un a des connaissances.
J'essaie de connaître "la méthode" pour pouvoir séparer les métaux précieux de n'importe quel alliage. En compilant toutes les informations et avec l'équipement et le matériel dont je dispose.
J'ai déjà acheté plus de vêtements de sécurité, des masques qui couvrent tout mon visage et des vestes. J'ai également acheté de la poudre de cuivre.
J'aimerais vous montrer comment je le fais et quand je reçois tout le matériel et les résultats que j'obtiens.
En attendant je continue à étudier, je continue à lire, toutes les informations sont les bienvenues, et merci encore.

ho my god, the perfect woman exists for me she must absolutely be interested in the art of refining, single and max 40 years, if you check all the criteria I marry you tomorrow.
well let's try to be serious for 2 seconds (it's going to be hard) i'll try to be precise chief

1) Between smb and ferrous sulphate, I'd say that FeSo4 is more selective and smb tends to precipitate platinoids, ferrous sulphate should do so less.

It would be good if an expert could confirm this, but I don't think I'm wrong. Someone I know explained to me that she could crack any metal using cyanidation, but I don't know the process in detail.
After a quick search for a video that I'm linking to here, you can see the reagents used and also the order used to refine each of the precious metals in this video here

te TheIPMI chanel youtube is good for you , if pgm's is you're passion .

this guy's can help you about pt pd and rh
here
it uses and experiments« colored powder from Hoock » « go and tcheck » he have 2 channel "chemistry" and "chemistry games"
Here is a last nugget , 4 metal should come here and poke around in the video tutorials, high level for silver conversion, fast easy and clear water, not a disgusting black water (like when you use NaOh and sugar methode) here

For the colored powder, my results for pd in therme of purity are 986/1000 for the first tests (crappy results).

I'm really crazy, searching everywhere on the forum, impossible to find a guy who is even 995/1000 in pt, pd, rh, ir .... in short if you find an interesting thread let me know for my part I have exceeded the ton of gold for a long time, and silver I must be 5 tons. I would have continued in my refinery, but there is a limit to human stupidity, I stopped when my boss wanted me to throw 12,000 litres of used acid into a field. I realised I was finished.

no solution againt stupidity

see you and show me you're result when you work , i think we have same passion like every one here

vincent

 

[Abdoulapapatte]

hello friends, i think you can learn about this guy's and video , 50 video about platinium group metal , you can see color , sponge , equipment and part of process , high level , from china.
work about catalyser car

very interesting

 

[4metals]

They spent a lot of money on some very nice equipment and reactors, most of which I have seen before but one piece impressed me and I did a snip and paste to copy it here. It is in the first video of the series but it shows up elsewhere in the videos as well. What it is, is a mounted horizontal vacuum jug with multiple ports to accept büchner funnels. What I like about it is the convenience of having a permanently connected vacuum source and a drain. I cannot see it clearly but there is probably a rinse water feed to clean it out and another shot from the video's included a large opening port on the end where you could reach in to either rinse better or retrieve solids that somehow ended up in the vessel. The drain likely allows the liquid to transfer on to another process without handling. This one is probably 40-60 liter capacity but with an ability to drain some liquid without removing funnels makes it quite versatile. I would love to know who makes and sells them.

The video is worth looking over slowly and checking out all of the nice equipment. Plenty of work space and likely a single scrap type facility.

 

[Lou]

QVF makes these but you can also get from any well equipped glassblower. These take two of the large pyrex bell jars that get welded end on end. Very nice for saving your back if doing small quantities in a job shop.

 

[100tific]

ho my god, the perfect woman exists for me she must absolutely be interested in the art of refining, single and max 40 years, if you check all the criteria I marry you tomorrow.

Sorry, is this a dating website? I'm 30 and single but we came here to talk about something else more relevant.

I think it is in line with the thread of this post. I find myself facing a new case. Taking into account all the advice you have given me, taking of course the precaution of washing well between each step, and melting the powder after each recovery. I have presented it schematically as follows.
I would like to ask in the last step, although I know I can wash with HNO3 to remove excess Cu, I would like to know how you can estimate the amount of copper powder you will have to add. I don't know if it depends on the platinum that I have in solution, or on the acid capable of reacting.
I also wanted to ask because, I know that to recover the gold from the aqua regia solution, I have to dilute 3 times the amount of liquid I have. But after this comes the recovery of the Pt from the solution, where it is better to have a concentrated liquid. So how can this be compatible? Evaporating this amount of liquid after recovering the gold and after having added SO2 seems too ugly to me. Any suggestions?
*The image shows the initial alloy, it is 82.06g that contains the quantities in parts per thousand of the precious metals indicated. The base metals that I indicate below are in a very small proportion until completing 1000.

I decided to start with AR because the amount of silver is very small and I won't be hindered by those silver chlorides. I don't act with nitric first because the amount of gold + Pt is greater than 25%.

 

[Yggdrasil]

Sorry, is this a dating website? I'm 30 and single but we came here to talk about something else more relevant.

I think it is in line with the thread of this post. I find myself facing a new case. Taking into account all the advice you have given me, taking of course the precaution of washing well between each step, and melting the powder after each recovery. I have presented it schematically as follows.
I would like to ask in the last step, although I know I can wash with HNO3 to remove excess Cu, I would like to know how you can estimate the amount of copper powder you will have to add. I don't know if it depends on the platinum that I have in solution, or on the acid capable of reacting.
I also wanted to ask because, I know that to recover the gold from the aqua regia solution, I have to dilute 3 times the amount of liquid I have. But after this comes the recovery of the Pt from the solution, where it is better to have a concentrated liquid. So how can this be compatible? Evaporating this amount of liquid after recovering the gold and after having added SO2 seems too ugly to me. Any suggestions?
*The image shows the initial alloy, it is 82.06g that contains the quantities in parts per thousand of the precious metals indicated. The base metals that I indicate below are in a very small proportion until completing 1000.

I decided to start with AR because the amount of silver is very small and I won't be hindered by those silver chlorides. I don't act with nitric first because the amount of gold + Pt is greater than 25%.

Yes, that was not in line with this forum's objective, true.

We do not recommend melting metal powders that are going to be refined further, before a sale it can make sense as it easier to XRF a bar.
And diluting, icing and filtering the solution is just to get rid of as much AgCl as possible.
Then drop the Gold and evaporate for so processing the Pt.

After dropping the Gold you could go directly to Cementing the Pt without evaporating,
not sure how effective that is.
To know how much Copper to use add it in small quantity (Powder) and test often with Stannous.

When you getting close to barren, siphon off the liquid and set it aside as a stock pot with a solid Copper bar and air bubbling around the bar.
The Pt powder should be pretty pure at this moment.
If it aren't pure enough you could repeat it with a concentrated solution as there should be only Pt and Cu involved at this point.

Anyway I'm confused by your numbers as they do not correlate with the numbers in your first post?


1227g of alloy with proportions:
Cu:684
Au: 189.63
Pt:17.25
Ag:91.58

This gives an amount of 0.02gram of Pt

Now you are talking about
82.06 grams of alloy with 84.41 ppm Pt
Which is 0.007 grams of Pt

We are talking about amounts that are hard to see here.

 

[100tific]

Yes, that was not in line with this forum's objective, true.

We do not recommend melting metal powders that are going to be refined further, before a sale it can make sense as it easier to XRF a bar.
And diluting, icing and filtering the solution is just to get rid of as much AgCl as possible.
Then drop the Gold and evaporate for so processing the Pt.

After dropping the Gold you could go directly to Cementing the Pt without evaporating,
not sure how effective that is.
To know how much Copper to use add it in small quantity (Powder) and test often with Stannous.

When you getting close to barren, siphon off the liquid and set it aside as a stock pot with a solid Copper bar and air bubbling around the bar.
The Pt powder should be pretty pure at this moment.
If it aren't pure enough you could repeat it with a concentrated solution as there should be only Pt and Cu involved at this point.

Anyway I'm confused by your numbers as they do not correlate with the numbers in your first post?


1227g of alloy with proportions:
Cu:684
Au: 189.63
Pt:17.25
Ag:91.58

This gives an amount of 0.02gram of Pt

Now you are talking about
82.06 grams of alloy with 84.41 ppm Pt
Which is 0.007 grams of Pt

We are talking about amounts that are hard to see here.

Thank you Yggdrasil, your answer about the platinum and copper part was very helpful to me. As for the gold, I have always diluted the solution a lot before adding MBS. I never did it with the concentrated solution.
What I will do is eliminate the nitrous compounds with sulfamic acid and heat, and in that concentrated liquor I will add the MBS. I have never done it like this without diluting it, I hope it goes well.

Regarding the numbers, I said they are parts per thousand (1000). Not parts per million (ppm).
That is, in this last case, which I have 84.41 thousandths, it means 84.41 parts of Pt per 1000 of alloy. That is, 82.06g*84.41/1000=6.92g Pt. If I had 0.02g I would not invest any time or reagents in recovering it.

Thanks for your response.

 

[Yggdrasil]

Thank you Yggdrasil, your answer about the platinum and copper part was very helpful to me. As for the gold, I have always diluted the solution a lot before adding MBS. I never did it with the concentrated solution.
What I will do is eliminate the nitrous compounds with sulfamic acid and heat, and in that concentrated liquor I will add the MBS. I have never done it like this without diluting it, I hope it goes well.

Regarding the numbers, I said they are parts per thousand (1000). Not parts per million (ppm).
That is, in this last case, which I have 84.41 thousandths, it means 84.41 parts of Pt per 1000 of alloy. That is, 82.06g*84.41/1000=6.92g Pt. If I had 0.02g I would not invest any time or reagents in recovering it.

Thanks for your response.

Sorry about that, a case of temporary blindness in my memory