Gold precipitation...

[Ben321]

Hello again everybody.

Here's my quandary. I have gold foils, from fingers and circuit boards, they were 1st ran through AP solution to remove base metals and loosen the remaining foils from the boards. I filtered them out of the AP. Rinsed the filters in HCL, Now I have them in HCL and Bleach to dissolve the foils. The question is I have some "Rust Out" which contains Sodium Hydrosulfite and Sodium Metabisulfite. Can I use it to precipitate the gold from the HCL/ Bleach solution or will it mess it up being as there is Hydrosulfite in the mix???

 

[FrugalRefiner]

Since you're at the point of reducing your gold out of solution, do you really want to add more possible contaminants? SMB is cheap. Stump remover from the hardware store or sanitizer from the home brew shop will cost less than $10.00. I cut corners on a lot of things, but rarely on the last step.

Dave

 

[Ben321]

I guess what i'm asking is Why would the Hydrosulfite mess up this reaction??

 

[g_axelsson]

I have no idea what hydrosulfite would do with the different metals in solution. Maybe nothing, maybe reacting with something that falls out of solution and contaminate your gold.

I bought a kilo of SMB ten years ago and I still have some left after precipitating more than 200 grams of gold. I spent about $20 including postage so I'm paying less than 10 cents per gram of gold and get a clean product. Now I have started to use copperas too (making it myself) and that is even cheaper.

I don't think you will get an answer on your question since no one is using "Rust out", the alternatives are cheap, working well and is easy to get, hard to beat that.

I understand that you might be impatient to get the gold out or maybe you're trying to save a dollar on using stuff you already have at home. But is it really worth the risk of messing up this close to the end? And by the way, what is the SMB concentration in "Rust out"? Using powder it's easy to get the correct amount and not precipitate a lot of copper chloride.

Göran

 

[Shark]

Bonide Stump Out from Home Depot is around $8 a pound. I bought two pounds almost 5 years ago and only opened the second one because I got to lazy to dig it out from the bottom with a short spoon. If I wanted to cut a corner a bit better instead of using an unknown chemical I would have bought a longer spoon.

 

[Ben321]

Göran its 98% SMB 2% Hydrosulfite.
And Guys, Yes we would and do cut corners when and where needed. It was posed as more of a question of curiosity than a "cutting corners" question. I was using the stuff to take rust off of some old tools my Granddad had and got to reading the ingredients, and thought I'd possibly use it, but I'd better ask the experts first. Thank you all for your insight and knowledge, I'll be using straight SMB in the final step. Thank you all.

 

[Lino1406]

No problem with 2% HS, as it reduces stronglier than bisulfite (HS is made by Zn reduction of sulphite)

 

[Topher_osAUrus]

Bonide Stump Out from Home Depot is around $8 a pound. I bought two pounds almost 5 years ago and only opened the second one because I got to lazy to dig it out from the bottom with a short spoon. If I wanted to cut a corner a bit better instead of using an unknown chemical I would have bought a longer spoon.

Just add water to the first bottle and use it with a pipette. Works wonderfully. (Hate them short spoons!) :lol:

 

[Shark]

No problem with 2% HS, as it reduces stronglier than bisulfite (HS is made by Zn reduction of sulphite)

Would this still produce that awful smell that SMB does?

 

[snoman701]

No problem with 2% HS, as it reduces stronglier than bisulfite (HS is made by Zn reduction of sulphite)

Ok, first question...is stronglier accepted English over yonder? I am entirely serious, I'm intrigued by word use.

Second, any chance of thiosulphate production, that could theoretically keep gold in solution...although I'm not sure at that low of a pH?

Would this still produce that awful smell that SMB does?

Sulfur Dioxide?

 

[Lino1406]

Snowman yes, the chance of thiosulphate, hence sulfur is almost meaningless at this low concentration. Stonglier - if it is understood then it is OK (both views in my opinion)

 

[Jordan1]

Which is the cleanest way to precipitate gold ?

Copperas , smb or so2 ?

Please explain why and how each precipitate reacts differently?

 

[FrugalRefiner]

Which is the cleanest way to precipitate gold ?

Copperas , smb or so2 ?

Please explain why and how each precipitate reacts differently?

Is this a quiz? Is there a prize if I get the answer right?

Sorry, I know that was a pretty snarky response, but asking the question leads me to believe you need to do some more studying of your own. Which precipitant is best depends on the situation, e.g., what metals might be in solution, in what quantities, etc. SMB produces SO₂ in an acidic solution, so the precipitation is similar.

So there is no, single, right answer. If you want the "cleanest" gold, there are other precipitants that might give you a better result.

Everything is here on the forum, but you'll have to spend some time reading to find it. It's not that we won't help you, but you need to learn enough to formulate a question we can answer.

Dave

 

[kernels]

Which is the cleanest way to precipitate gold ?

Copperas , smb or so2 ?

Please explain why and how each precipitate reacts differently?

:lol: Great question, transfer $200 in either Bitcoin or Cash to one of the forum elders and they will spell it out for you. Alternatively, study study study, then do small scale experiments, then ask specific questions when you don't get exactly what you expect. If you show the effort that you have put it, you will be amazed by the quality of answers you can get on here.

 

[robbymoon1177]

:lol: Great question, transfer $200 in either Bitcoin or Cash to one of the forum elders and they will spell it out for you. Alternatively, study study study, then do small scale experiments, then ask specific questions when you don't get exactly what you expect. If you show the effort that you have put it, you will be amazed by the quality of answers you can get on here.

You and Dave need to back up off people asking questions. All yall do is throw the hokes all over and we all know ( the ones that have it ) most people wouldn't even understand and yet you poke at people's nerves until they just say screw it and try some **** without asking cuz of people like you guys bugging out. If you ain't gonna answer a simple question, stay off the forum. This used to be an awesome place to learn til lately when yall be saying stupid ****...

 

[galenrog]

You and Dave need to back up off people asking questions. All yall do is throw the hokes all over and we all know ( the ones that have it ) most people wouldn't even understand and yet you poke at people's nerves until they just say screw it and try some **** without asking cuz of people like you guys bugging out. If you ain't gonna answer a simple question, stay off the forum. This used to be an awesome place to learn til lately when yall be saying stupid ****...

Says the new guy who replied to a six year old post.

Yes, many that have been here for well over a decade can be a bit snarky toward being asked the same question 20-30 times a month. I tend to be rude when responding to some types of questions or comments. Especially those who tend to use profanity in written comments. Experience shows people who tend to use profanity in attempting to clarify or emphasize points have extremely poor communication skills.

Next time, please formulate your sentences without profanity. If you are unable, please seek tutoring from a specialist.

Yes, I am being rude. Thank you for noticing.

Time for more coffee.

 

[Martijn]

You and Dave need to back up off people asking questions. All yall do is throw the hokes all over and we all know ( the ones that have it ) most people wouldn't even understand and yet you poke at people's nerves until they just say screw it and try some **** without asking cuz of people like you guys bugging out. If you ain't gonna answer a simple question, stay off the forum. This used to be an awesome place to learn til lately when yall be saying stupid ****...

At least Miss Hoke could write in proper English and not curse and swear like a little.. oh well, i vote a permanent BAN, so you can read all obout it in Hoke's book!

If you have nothing else to contribute but being offended, please stay away! And go wash your pie hole with some soap.

The reason we don't write instructions for ignorant folk, (even after donating 200 dollars) is because these stupid folk that want quick answers go and kill themselves and their family and pollute their only waterwell in a hundred mile radius, without having the proper knowledge to even perform simple chemistry.

Some people should be better off writing unfounded dumb replies to outdated messages and go start a knitting club.

Einstein.

 

[Yggdrasil]

You and Dave need to back up off people asking questions. All yall do is throw the hokes all over and we all know ( the ones that have it ) most people wouldn't even understand and yet you poke at people's nerves until they just say screw it and try some **** without asking cuz of people like you guys bugging out. If you ain't gonna answer a simple question, stay off the forum. This used to be an awesome place to learn til lately when yall be saying stupid ****...

Some first impression mate!

If you can't read and understand something as simple as Hokes book, I'd say one is not suited for refining.

As has been noted, keep a civil language here, it might be my eyes but I have not seen profanities yet.

In refining simple answers are so rate it has been given its own thread.

I'll post some rules to you when I have access to my computer again.

 

[Shark]

If you can't read and understand something as simple as Hokes book, I'd say one is not suited for refining

It doesn’t get any more clear than that.

 

[Yggdrasil]

You and Dave need to back up off people asking questions. All yall do is throw the hokes all over and we all know ( the ones that have it ) most people wouldn't even understand and yet you poke at people's nerves until they just say screw it and try some **** without asking cuz of people like you guys bugging out. If you ain't gonna answer a simple question, stay off the forum. This used to be an awesome place to learn til lately when yall be saying stupid ****...

Here is the links I promised earlier.
If you want to stay here you will read these and heed the forum rules.
There are a link to those too.

We ask our new members to do 3 things.
1. Read C.M. Hokes book on refining jewelers scrap, it gives an easy introduction to the most important chemistry regarding refining.
It is free here on the forum: https://goldrefiningforum.com/phpBB3/viewtopic.php?f=54&t=19798
2. Then read the safety section of the forum: https://goldrefiningforum.com/forums/safety.47/
3. And then read about "Dealing with waste" in the forum: https://goldrefiningforum.com/threads/dealing-with-waste.10539/

Suggested reading:
https://goldrefiningforum.com/forums/the-library.101/
https://goldrefiningforum.com/threads/when-in-doubt-cement-it-out.30236/
https://goldrefiningforum.com/threa...le-read-this-before-you-post-about-ore.33333/


Forum rules is here.
https://goldrefiningforum.com/threads/gold-refining-forum-rules.31182/