Potassium Iodide-Iodine gold etchant

[Juan Manuel Arcos Frank]

John:

You speak spanish pretty good!!!!!....Would you be my teacher?...look...what does it mean BTW?.

Behave yourself.

Manuel

 

[goldsilverpro]

BTW. By the way,.....

 

[Juan Manuel Arcos Frank]

GSP,my Dear Friend:

Yes Sir,this patent works with this method.It has the disvantage of cost,because is more expensive than AP&Clorox methods.The good news is that works lovely with gold refractary ores.

Have a nice day.

Your friend
Manuel

 

[Juan Manuel Arcos Frank]

Thanks,GSP...

 

[Juan Manuel Arcos Frank]

Pohyh:

Read the patent that GSP has posted...here is the method,Iodine will be release,be careful.

Regards

Manuel

 

[DNIndustry]

I was the one who starting posting about this.
both KI/I2 and NH4I/I2. So far I have 6LB's of I2 I can reuse.
The NH4I/I2 is much cheaper and rate controlled.

Both ways work. Same idea as HCL + CL

I am not going to say any thing negative about the methods suggested in this forum. They work, very well...

I doing so I am trying to show respect. Something I dont that is given to alternate ideas. ( I do mean this peacefully)

I tried to get answers and got criticism. I had to figure it out completely on my own, but I did.
Never had any "bad" reactions
I got results. It works.
I decided I wasnt going to make waves....so I havnt posted anything further about it.

If you need help PM me I dont want this causing an uprising. If others want to know Ill respond openly..Ill let the forum decide.
-DNIndustry

 

[lazersteve]

DNI,

I for one am very interested in the Iodine processes. I would like to see your findings posted to the forum.

A few years back I did a little testing with iodine but was not fond of handling the iodine as it's a little messy in my opinion. I also had problems separating and identifying the precipitated gold. A bigger drawback to the iodine methods are that iodine and it's compounds are one of the most watched chemicals by the Feds in America due to their use by illicit drug manufacturers.

On the plus side the reaction was more selective to gold and worked quickly.

Hydrochloric acid, 3% Hydrogen peroxide, and Clorox bleach are very common chemicals and that's a big plus for me. They may be slower, but since I'm a small refiner, time is not critical for me. All the gold that I refine is either for a few select customers or put away as a long term retirement plan.

Steve

 

[jamthe3]

I would love to read about it as I'm sure Pohyh would also, seeing as he started the thread.

Juan, thanks for lying about my spanish fluency. I now feel like walking across the bridge, chest out, full of bi-lingual courage, ready to......look in my translation dictionary first time someone asks me a questiong not in the "present" tense.

BTW stands for "by the way"

Cheers,
John

 

[Platdigger]

Same here DNI, I would be very interested in what you found out about this proccess.

Think there may be any special dangers doing this with gold bearing ores?
Randy

 

[pohyh]

Hi DNI

Obviously I am seriously keen on your experience on halide etching and I have PM you on my request.

I for one believe in sharing my experience I have on the topic which I am keen on. Sometime I got positive and sometime negative comment. Nevertheless, all input is taken positively. You are talking on creating a wave on your finding, who know, your wave might have a chain reaction and turn out to be tsunami for us in gold etching process!

I remember when Einstein put up his E=MC2 equation, for him is wave, but subsequently input from various other scientist made it a world greatest physic equation!

Keep up your good work!

Regards
Poh

 

[usernameguy]

I've turned on to this recently. I simply add enough KOH to the Iodine etch solution until it turns clear (well, cloudy, then clear after settling). M precipitate has typically been a greyish color. The solution is discarded, so I figured I might as well recovery the Au. All I've really found is we're "dumping" the solution well before it needs to be replaced as 1gal will dissolve 100g Au. I suspect the reason is because the etch rate will start to decrease. We're basing our process on about 30 Angstroms per second. If anyone has any eperience on the linearity of the etch rate with Au saturation, I'd be interested. For now, I'll let em do what they're doing till I know better. It's kind of too bad, I just discovered this practice, and have only done it once, recovering about 15g of precipitate from a gallon of solution. All I care about for now is if this is pure gold, and am curious whether the etch rate is linear to saturation. I doubt it just using simple reasoning and a basic chem knowledge.
Guy

 

[Juan Manuel Arcos Frank]

I completley agree with Steve,AP & Clorox methods are the best,they are cheap,all substances are available in the supermarket and both processes have proven to work well.The problem is AR,some countries limit the use of substances,especially acids,sometimes poor`s man AR solves the problem.The problem of toxic fumes remains unresolved.
This is precisely the task we have to do,find and investigate new processes,some will work,others will not.

To prove what I just said I am going to post some information about Iodine Processes in gold ores,I hope this helps the Forum`s Members to investigate and experiment with these processes in the gold scrap recovery field.

I wish you all a nice day.

Manuel

 

[Juan Manuel Arcos Frank]

Guys:

I am such an idiot!!!!!!!!!...Would you tell me how to post al these files together?....BTW...Would you tell me how to quote?.

I do appreciate

Manuel

 

[Juan Manuel Arcos Frank]

here the last one

 

[Harold_V]

Would you tell me how to post al these files together?

Unless there are unusual circumstances, all you need do is add them one at a time by clicking the attachment button. Do be aware that the first one in becomes the last one viewed, so if you have something that is best viewed in sequence, post them in reverse, last one posted will be on top, with the first one posted on the bottom.

BTW...Would you tell me how to quote?.

Simple:

 On your keyboard, enter  [quote] Then enter your message, and close with [/quote]

Note that you do NOT click the code button. That has been clicked so the needed code is displayed.

If you want to make reference to the source that is quoted, you would enter it thus:

[quote="Harold_V"], enter your message, and close with [/quote]

By not clicking the code button, the above would appear this way:

enter your message, and close with

Hope this helps.

Harold

 

[pohyh]

Hi Manuel

Thank you very much for your input on the above mentioned subject.

When I studied for my master degree in analytical chemistry in a UK university, my mentor professor used to give me lot and lot of useful information for my study (BTW my field of experty is chromatography, ie seperation technique). When I start work, I missed my good old day in University until I come to this Forum.

To you and all the member of this Forum, I will put up a "thesis" once I have any concrete result on this topic!

On another issue, I totally agree with you on the problem with AR. Here in Singapore, toxic fume, be it generate from HCL or H2NO3, it unaceptable with the local autority, unless you have a proper ventilation to clear your gases. You need to apply for a proper permit with local Environment office and by the time they give you a permit, you must have lost your interest on gold recovery! Doing it secretly is out of the question as SIngapore is a small urbanised city. Just for ilustration, a car drive at 80KM /hr from East to West or North to South will be less than a hours!

Again thank for your input.

Regards
Poh

 

[goldsilverpro]

I went to Singapore, buying electronics gold scrap from manfacturers, about 10 times in the mid 70s. It was a very strict country. Throwing out a cigarette butt could cost a several hundred US dollar fine. Men with long hair had to get a haircut at the airport before they could enter the country. However, it was the cleanest city I'd been in (the Paris of Asia) and the wages were about 10 times more than the rest of Asia. I loved it there, after I got a haircut.

 

[Platdigger]

Say usernameguy, can you tell us more about the iodine proccess you are using?

Is this done at a company that you work for?
Randy

 

[Harold_V]

after I got a haircut.

You with long hair? Really? I figured you for a conformist type.

Harold

 

[pohyh]

Hi GSP

I thought I am speaking with a young man but by the way you write, look like you are a good old wise man well verse in your field!

Yes you are right, at 70, the house rules are very strick and go without saying, that was a "fine" country, ie you get fine for every single mistake you commit. Well, I am fortunate as I was still a young teenage running around!

Obviously things change nowaday. We are going to have 2 casinos very soon (2012?) and FYI there is no more barber shop for long hair's guy in the port of immigration. You can come in with short hair, long hair or bald ie no hair!

So much so with SIngapore...now a little update on my study. Manuel just pass me some interesting on alcoholic halide gold etching. I have read them and look promising. I have also conduct some priliminary study on AP etchning versus Halide itching. What I can say now is that halide work well in sample that is expose (eg gold pin) while as AP is really economical and it work really well, as Steve suggest. The advantage of halide etch is the time.

Anyway, my concern is still the environment issue. I will persue the halide issue and come out with a recepie in due course. Perhelp, I will look into way and mean to address the environment issue with AP later.

Regards
Poh