Gold Precipitation

[maynman1751]

so now i have about 100ml of deep yellow solution. what do i do now?

Put a cover over it and do your reading and studying. It will be much more beneficial to you if you find this answer out yourself rather than someone telling you what to do next. Your gold isn't going anywhere. Cool your jets and take your time to learn proper procedure. It's a lot better than messing up and then trying to figure out how to fix it. Listen to the advice given and you'll be on your way!

ok thanks .just out of curiousity ,did i do good returning the solution back to a deep yellow

I'm not sure. You need to test with stannous to see if there's gold in solution. That's why stannous is so important. It's your eyes into the solutions. It tells you what you have or don't have. Do a search for making stannous. It's very simple and very necessary.

 

[goldpete]

so now i have about 100ml of deep yellow solution. what do i do now?

Put a cover over it and do your reading and studying. It will be much more beneficial to you if you find this answer out yourself rather than someone telling you what to do next. Your gold isn't going anywhere. Cool your jets and take your time to learn proper procedure. It's a lot better than messing up and then trying to figure out how to fix it. Listen to the advice given and you'll be on your way!

ok thanks .just out of curiousity ,did i do good returning the solution back to a deep yellow

well thatwas intereting , i read the book , very informnative indeed

 

[dcorley001]

Don't know if I'm more impressed or jealous. Wish I could read and absorb an over 300 page technical manual in one night...

 

[goldpete]

well it was easy because most of the book didnt apply to me ............. im not interested in aquriing the silver or paladium or any other metals . so i scrolled down . then i went past where it talked about other types of gold such as green gold , white gold etc and i scrolled on past where it talked about chemicals and techniques i dont have.

i have notes stored next to the parts that relate to me . for example , the soaking in nitric ,
mixing and using the aqua regia,
avaporating the nitric,
dropping the cold ( which didnt help becaue im using smb instead of copperas)
washing the gold
and finally the melting of the gold

 

[qst42know]

You missed some very important information.

These other metals are closely associated with gold and show up often. Lead, silver, and platinum group metals all show up in e-scrap. When they do you need to know how to deal with them whether you want them or not. You will fail to achieve an acceptable degree of gold purity if you don't learn what Hoke teaches to exclude these other metals.

 

[Harold_V]

What qst42know said.
If you short-change the reading of Hoke's book, you're going to miss a great deal of information that relates to processing gold. You, above everyone else, will pay a price for that decision.

I strongly recommend you read the entire book, then do it again. Do it until you UNDERSTAND what she teaches. It serves no purpose to go through the motions, then come away without an understanding. It's all interrelated----so if you choose portions you think you need to know, you're going to have an endless supply of questions, not understanding why things turn out as they do, and that's assuming you achieve some degree of success.

You can't learn to play the piano by practicing only select notes. You must learn all of them. Everything in her book is important to you, whether you recognize that fact, or not.

Harold

 

[Nur]

Hello everybody,
I am student from Malaysia. I am doing research in environmental impact of recycling gold from e-waste. I cooperate with one of companies in Malaysia. However, some data is consider as confidential. I really need the assumption amount of chemicals they use to analyze the environmental impact for producing gold from e-waste. I really appreciate if expertise from this forum can help me. The company have used nitric acid, hydrochloric acid, sulphuric acid, sodium hydroxide, zinc dust and zinc ingot in acid dissolution process. What I know from literature, nitric acid and hydrochloric acid is aqua regia, sulphuric acid can be used for leaching copper,zinc dust and zinc ingot used to drop palladium and silver. I don't know the function of sodium hydroxide. After acid dissolution, precipitation process is needed but this company don't give me any data including the name of chemicals for precipitating gold, copper, silver, palladium and platinum. Everybody know what are the chemicals that may can be used for precipitating all metals and the amount/ratio of assumption for each precipitators? Is it possible that the sodium metabisulfite is used for precipitating gold in the acid dissolution mixture?or iron (III) chloride more suitable to used for precipitating gold?How about palladium, platinum, silver and copper?Really need your help.

 

[Palladium]

Here you can find all the answers :arrow:

 

[GoldDen]

You say that 'here you can find all the answers'. I have read loads of questions on here that are left ignored or (un)answered with a rather unhelpful "read the book". If this is supposed to be a forum then it would be nice if questions are actually answered and a brief explanation of the solution given.

If this forum just exists to massage some member's egos you may as well replace the forum with a message "I know the answers 'cos I'm really really clever but I'm not telling stupid you ! Read Hoke's book, re-read Hoke's book, it is all in Hoke's book... "

Yes great thanks ! While the process maybe totally covered in that book, however, as the materials vary it would be nice if someone did take the time to explain why the solution produced a white/grey powder instead of black, or why it went blue instead of yellow... you can't get that level of support from a book.

So is this a forum or a self help group for people insecure in their intellectual abilities that need some mutual reassuring ?

I had to bring this up otherwise this forum will waste away and die off, have you seen how many people don't get a real answer and never come back ?

 

[patnor1011]

You say that 'here you can find all the answers'. I have read loads of questions on here that are left ignored or (un)answered with a rather unhelpful "read the book". If this is supposed to be a forum then it would be nice if questions are actually answered and a brief explanation of the solution given.

If this forum just exists to massage some member's egos you may as well replace the forum with a message "I know the answers 'cos I'm really really clever but I'm not telling stupid you ! Read Hoke's book, re-read Hoke's book, it is all in Hoke's book... "

Yes great thanks ! While the process maybe totally covered in that book, however, as the materials vary it would be nice if someone did take the time to explain why the solution produced a white/grey powder instead of black, or why it went blue instead of yellow... you can't get that level of support from a book.

So is this a forum or a self help group for people insecure in their intellectual abilities that need some mutual reassuring ?

I had to bring this up otherwise this forum will waste away and die off, have you seen how many people don't get a real answer and never come back ?

I can assure you forum is not going to die. This type of answer come to what can be called basic question. If someone ask basic question it mean he does not know what he is doing. No answer is going to help him unless he get a grip on pretty basic simple things. Whoever struggle with these should find different hobby.
Recovery and refining is so complex that unless you are willing to put in considerable amount of time for studying you will fail and while failing you are going to endanger yourself and everyone around you.

 

[FrugalRefiner]

GoldDen, The Tips for Navigating and Posting on the Forum thread may help you understand how this forum works. Insulting members in your first post isn't a great way to make friends.

Dave

 

[GoldDen]

I don't want to belittle these processes, but come on it is hardly THAT difficult. it is not SO COMPLEX. Yes, it can be dangerous, but surely no more so than, say, gas welding ? Why make it sound like you need a higher degree in chemistry to do this ? If people on here wanted to learn about chemistry then I would really NOT recommend Hoke's cook book, but take a comprehensive Open University degree course.

The processes are not that tricky, When refining I estimate the approximate amount and, yes, it gets sloshed in. I am not going to titrate tiny drops at a time into a 5L solution, and don't tell me you do either.

It strikes me that most posters have A specific problem (too much bleach, not enough SMB, too fine gold powder, strange sediments, unexpected colours, poor filtering, etc). They are looking for a 'top tip' to correct the problem. I suspect that the 'gurus' on here are people that work in a scrap that have picked up a little chemistry, I really doubt that anyone has a higher degree in chemistry, or possibly even a first, however, where they score is they have the HUGE advantage of loads of experience. Some of them must have come across a similar problem in the past and eventually they found a way to correct it (or not and we can all benefit from finding the solution).

So why don't these "gurus" pass on some of this knowledge gained through experience, trial and error ? It beats just telling everyone to go off and read a book. " They will be better chemists if they work it out themselves !" Possibly, but if that is your goal then host a tutorial page to teach people chemistry, why have a gold refining forum ?

The forum may not die off as there will be an old core of 'experts' mutually feeling good about their knowledge as the elite, but it is a great shame that the site is not growing anywhere near as it should given the massive surge in people refining gold these days...

Just reading through this thread I could list half a dozen members that with encouragement could have learnt and become contributors in the future, instead they seem to have vanished.

 

[4metals]

GoldDen,

Cute name, a little play on words, you gave it some thought.

Too bad you didn't give as much thought to being a member here. You came here and after half an hour as a member you're telling us this forum will waste away and die off. Hmmmm.

It is my opinion that you have come here to cause more trouble than to learn. I happen to have an advanced degree in chemistry as do others here. Unfortunately my degree is not in psychology, if it were, I might consider your presence here entertaining, instead I consider your presence here more trouble than you are likely worth. So I am banning you. I hope you at least downloaded the book from the library because that will be where you will be learning, not here anymore.

 

[Anonymous]

Aww bless.

Edit: for those who have PMed me or phoned me and asked if my comment was some Brit expression yes it is. It was based on the fact that I thought that 4Metals handled that extremely well, given that the guy was a ******. 8) 8)

sorry for any confusion.

Jon