Rhodium ore

[Brett6050]

Okay so no one goes to this site anymore?

 

[Shark]

At least one of the previous persons has died since this post was active. Possibly more have also.

 

[Yggdrasil]

Okay so no one goes to this site anymore?

Plenty people go to this forum, since it is the best forum for precious metals.

But the person you quoted has not been on the forum since 2011.
He left for some reason, it can be health, loss of interest or what ever.

Some people just leave when they don't get the information they want, instead of the information they need.
The real world can be a disappointing place.

It may be wise to check when a member was last active before asking them questions.
Hold your pointer over their name/avatar and this information will be showed.

Edited for clarity.

 

[jphayesjr]

I am newbie from Indonesia.

I do small research on black sand containing rhodium.
I'd like to share the technique which i know so far..

1. Crush the ore until 400-800mesh
2. Roasting the ore until 500oc for about 2-3hours
3. let it cool and soak it into HF+Nitric Acid to get rid off any SiO2 and heat it up for 2-3hours
4. Heat it up untill dry. then adding Aqua Regia, heat it up for 2-3hours to dilute Au, Pt, Pd
5. Siphon the liquor and separate the residue from the Aqua Regia leaching. (the residue might contain Rh, Ir, Os)
6. Process the mother liquor with sodium metabisulfite for Au, salmiac for Pt, sodium chlorate for Pd. (remove the nitric first by heating)
7. Process the residue with sulfuric acid. heat it up for 2-3hours.
8. Dilute the sulfuric acid with lots of water before siphoning. (4water : 1 sulfuric acid)
9. After siphoning, process the sulfuric acid with tin or iron. (pH 1)
10. i get black powder.

and that's all i know.. i am still working it/the black powder out to get pure rhodium. Am i making a mistake on above technique? :?:

The black sand is SiO2 sand with lots of Fe and 5% rhodium.(reports from local metallurgy lab)
I tested it using steve method for rhodium and it is positive.

Any advice will be regarded. I need help on making pure rhodium.

What is salmiac? Thanks for sharing.

 

[Yggdrasil]

What is salmiac? Thanks for sharing.

Ammonium Hydroxide, we call it Salmiakk in Norway too

 

[BlackLabel]

With only one "k" at the end in German (Salmiak).

 

[Shark]

With only one "k" at the end in German (Salmiak).

Thanks guys, this is the type things that help us to better understand other languages.

 

[Yggdrasil]

With shame I have to admit I made a mistake.
Ammonium Chloride is called Salmiac /Salmiak(k).
It is besides refining used as flavouring in Liquorish

 

[jphayesjr]

Ammonium Hydroxide, we call it Salmiakk in Norway too

thanks

 

[Yggdrasil]

thanks

Read my last post here

 

[gultekin]

I have access to some of the richest rhodium ore on earth. I have 300 pounds of this material at my house right now and can get tons more. This material comes from the South American "platina belt" and is material the Spanish tried to smelt and couldn't do it. Finally they abandoned millions of tons of this material, leaving it for someone with better metallurgical knowledge. In time it was forgotten. How I am getting this material is my secret.

I have decided to offer small amounts of this material t anyone on the forums who wishes to extract rhodium. This material yields a bright green solution with everything I have tried, but straight HCl seems to work the best. This stuff comes in pieces that weigh as much as 20 pounds. I have no means right now to crush this stuff and it has a tendency to flatten before it breaks.

Here is the deal. I have access to far more of this material than I can ever use. After due consideration I have decided to share with others on the forum. But I am not giving it away. What I am asking is 50% of what you receive for processing. You cover the costs of extraction and I cover the costs of shipping. If you think this is far please let me know by emailing me at [email protected]. I will send pictures of this material and initial samples to all of those interested.

But remember this -- rhodium is carcinogenic and requires proper fume control.

I will also be running my own material and producing rhodium metal. It starts out red like copper, but is much heavier, and turns gray on drying.
I extract it with just HCl and use iron as a reducing agent. I currently have about 20 ounces of this -- but I have pounds of the yellow alkaline chloride of rhodium. This is made by adding ammonium hydroxide to the HCl solution until a deep blue solution is reached. This occurs at about a pH of 10 to 12. A small addition of HCl drops the pH to about 8 and the yellow rhodium chloride precipitates out. As they say there is more than one way to skin a cat, although getting the cat to hold still must be a real problem.

Please do not ask for a sample of this unless series about doing something with it. Right now my money is very low and shipping costs money. But I will ship a sample to anyone who is series.

Randy in Gunnison

Dear Randy
we have stocks of platinum rhodium osmium concentrate in Turkey. We trying to find a real buyer refinery on the world. Can you advice any real buyer refinery ?
Platinum %8 Rhodium %4 Osmium %4
Best regards

Gultekin Cici
Semi Mining Ltd. Co.&Turkey
[email protected]

 

[Justincase]

One of the most effective reactions for rhodium I have seen is concentrated sulfuric acid (97 %) at 400 °C which leads to red plate-shaped single crystals of Rh2(SO4)3.
And I quote.
"The reaction of elemental rhodium and concentrated sulfuric acid (97 %) at 400 °C leads to red plate-shaped single crystals of Rh2(SO4)3 [trigonal, R3, Z = 6, a = 806.8(1) pm, c = 2204.8(4) pm, V = 1242.8(4) × 106 pm3]. The same reaction carried out at a temperature of 475 °C leads to orange crystals of Rh2(SO4)3·2H2O [orthorhombic, Pnma, Z = 4, a = 920.46(2) pm, b = 1244.47(3) pm, c = 833.37(2) pm, V = 954.61(4) × 106 pm3]. Thermal analysis and X-ray powder diffraction measurements were performed to investigate the decomposition and resulting residues of the compounds. For both compounds, the decomposition occurs through two steps and is finished at around 1000 °C at the stage of elemental rhodium. Additionally, both sulfates were characterized by means of IR spectroscopy."
How exactly you reflux 97% sulphuric Acid at 400c and what I can only expect to be several hundred PSI I do not know.
It would be interesting to find out if it can be achieved with any level of safety outside a specially constructed acid-resistant bunker to sit your primary reaction vessels in.

 

[orvi]

One of the most effective reactions for rhodium I have seen is concentrated sulfuric acid (97 %) at 400 °C which leads to red plate-shaped single crystals of Rh2(SO4)3.
And I quote.
"The reaction of elemental rhodium and concentrated sulfuric acid (97 %) at 400 °C leads to red plate-shaped single crystals of Rh2(SO4)3 [trigonal, R3, Z = 6, a = 806.8(1) pm, c = 2204.8(4) pm, V = 1242.8(4) × 106 pm3]. The same reaction carried out at a temperature of 475 °C leads to orange crystals of Rh2(SO4)3·2H2O [orthorhombic, Pnma, Z = 4, a = 920.46(2) pm, b = 1244.47(3) pm, c = 833.37(2) pm, V = 954.61(4) × 106 pm3]. Thermal analysis and X-ray powder diffraction measurements were performed to investigate the decomposition and resulting residues of the compounds. For both compounds, the decomposition occurs through two steps and is finished at around 1000 °C at the stage of elemental rhodium. Additionally, both sulfates were characterized by means of IR spectroscopy."
How exactly you reflux 97% sulphuric Acid at 400c and what I can only expect to be several hundred PSI I do not know.
It would be interesting to find out if it can be achieved with any level of safety outside a specially constructed acid-resistant bunker to sit your primary reaction vessels in.

400°C sulfuric sounds like a lot of fun I am scared of it even at room temperature

 

[BlackLabel]

From acid's point of view, it's not funny.

 

[fishaholic5]

Ok, in relation to Sheckers post on pgms going into solution with acids that would not normally put them in solution...
There are particular ores that due to complex displacement reactions can result in pgms going into solution as the sulfates.

Cheers Wal

 

[jphayesjr]

With shame I have to admit I made a mistake.
Ammonium Chloride is called Salmiac /Salmiak(k).
It is besides refining used as flavouring in Liquorish

Yummy

 

[jphayesjr]

What is salmiac? Thanks for sharing.

Your basic idea is correct. To what temperature do you heat the mixture at step 3? There are a few videos in YouTube that are basically correct to help you get pure metal from what I am inferring is black metal oxide powder. You need to include safety equipment and procedures. Rhodium is highly toxic as are its' salts, Osmium has many toxic compounds, and in some reactions can emit toxic gasses. Your black powder may contain that as well as some iridium.

 

[Yggdrasil]

Your basic idea is correct. To what temperature do you heat the mixture at step 3? There are a few videos in YouTube that are basically correct to help you get pure metal from what I am inferring is black metal oxide powder. You need to include safety equipment and procedures. Rhodium is highly toxic as are its' salts, Osmium has many toxic compounds, and in some reactions can emit toxic gasses. Your black powder may contain that as well as some iridium.

That is not correct. Neither Rhodium , Palladium, Platinum or Iridium are toxic as metals, but are quite toxic/hypoallergenic as salts.
Toxicity includes very many salts of metals.
Osmium and Ruthenium I can't say as metals, but they have this habit of forming TetraOxides which are very nasty.

 

[Yggdrasil]

I think it’s like this:
The less reactive a metal is, the safer it is, regarding toxicity, allergies and such.

Excluded radioactive metals of course.

Correct me if I’m wrong, this is just an idea if mine.

 

[Glyn loya]

I have access to some of the richest rhodium ore on earth. I have 300 pounds of this material at my house right now and can get tons more. This material comes from the South American "platina belt" and is material the Spanish tried to smelt and couldn't do it. Finally they abandoned millions of tons of this material, leaving it for someone with better metallurgical knowledge. In time it was forgotten. How I am getting this material is my secret.

I have decided to offer small amounts of this material t anyone on the forums who wishes to extract rhodium. This material yields a bright green solution with everything I have tried, but straight HCl seems to work the best. This stuff comes in pieces that weigh as much as 20 pounds. I have no means right now to crush this stuff and it has a tendency to flatten before it breaks.

Here is the deal. I have access to far more of this material than I can ever use. After due consideration I have decided to share with others on the forum. But I am not giving it away. What I am asking is 50% of what you receive for processing. You cover the costs of extraction and I cover the costs of shipping. If you think this is far please let me know by emailing me at [email protected]. I will send pictures of this material and initial samples to all of those interested.

But remember this -- rhodium is carcinogenic and requires proper fume control.

I will also be running my own material and producing rhodium metal. It starts out red like copper, but is much heavier, and turns gray on drying.
I extract it with just HCl and use iron as a reducing agent. I currently have about 20 ounces of this -- but I have pounds of the yellow alkaline chloride of rhodium. This is made by adding ammonium hydroxide to the HCl solution until a deep blue solution is reached. This occurs at about a pH of 10 to 12. A small addition of HCl drops the pH to about 8 and the yellow rhodium chloride precipitates out. As they say there is more than one way to skin a cat, although getting the cat to hold still must be a real problem.

Please do not ask for a sample of this unless series about doing something with it. Right now my money is very low and shipping costs money. But I will ship a sample to anyone who is series.

Randy in Gunnison

Well u used to have the richest rhodium ore on earth buddy I have tons of it for sale with gold and silver copper titanium. And cobalt zinc indium ruthenium ! I will also send sample to Byers im located in Arizona safford area thanks loya Steve805a gmail .com 928)701) 5161 ok thanks.