What Chemical Can I Use to Precipitate the Gold Out of Gold Chloride
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Dissolving Gilded and Precipitating Gold (22 replies and v comments)
Muriatic Acid + Clorox Bleach is dissolving my golden, but Sodium Metabisulfate (stump out) is not dropping the aureate dorsum out in pure form it'due south only changing colors of my solution. no precipitation.
You probably want sodium hydroxide, a base, not sodium metabisulfate, an acid.
If you lot leach with aqua regis (nitric and hydrochloric acids), you can precipitate the gold with sodium metabisulfite (a reducing agent).
Mixing muriatic acid (hydrochloric acid) with bleach (sodium hypochlorite), you are freeing chlorine to attack the golden. Y'all are making gold chloride. Endeavour exposing the solution to ultraviolet low-cal, to break the bond between the gold and the chlorine molecules.
What is that doesn't work
Ultraviolet light comes from the Lord's day correct? And so gear up it exterior?
Ok. I added sodium and potassium hydroxide to muriatic and bleach solution and it coagulated with a white look.
I stnowopped using Clorox. I used only muriatic acid and used sodium and potassium hydroxide and bingo. Solution turn clear with brownish sediment in the bottom. As I understand it that's my golden. Hopefully.
It besides worked on the hydrochlorite mix simply no near as well.
You lot should try to get a PH of around 1 before using SMB to driblet the gilt, By using sodium and potassium hydroxide y'all raised the PH. That is why it worked and then.
Good morning time friends. Every bit an update, I am consistently dropping golden from hydrochloric With sodium hydroxide. However, I have noticed some dissimilar colors showing aside from brown. I have black. Blue and green. Any idea what these other colors may be?
If you want to leach gold yous need an oxidizing environment (add chlorine gas or clorox) until you achieve an ORP of 1000mV, at a Ph of about 5, hopefully warm temperature and you will leach gold. One time in solution, split up liquid from solids, reduce the ORP to 100 -500 mV using NaHSO3 and your gold will precipitate. Read chemistry papers between 1850 to 1930'southward....the quondam folks knew what they were doing.
Lye is sodium hydroxide. Simply the real problem is that your precipitant volition not piece of work if chlorine or whatsoever other oxidizer is present in solution
Thanks and your absolutely right.
You lot are right of grade. I forgot to mention that the solution has to be gratis from chlorine and oxidizers outset.
Simply to my experience the chlorine evaporates very fast and in addition 1 should ever apply the minimal amount of chlorine/Clorox that is needed to dissolve the gilt. Exercise non use likewise much or it will take longer to evaporate. Also a persistent myth is the premixing of HCl+Cl or Aqua regia. That is a bad thing to do. Ever estimate the corporeality of HCl or chlorine needed exercise not premix the dissolving solution no thing if 1:iii or 1:4 or whatever you lot observe on the internet.
The ore I'm processing with HCI is just packed with platinum group metals and turns either a bright yellow or carat orange. When I precipitate with SMB THE solution fizzez yellowish bubbling and the precipitate is orange as orangish tin be and sponges. When I precipitate with sodium hydroxide it turns dark brown or calorie-free brown with black specs in it.
hello guys, can please tell me how to separate golden from copper and silver? And anyone knows if borax split copper from silver please? Thanks.
Thank you a lot my friend I'm working on what you sent me and is working neat, in that location is just some little things I need to work on, I really appreciate your help my friend this things that I'chiliad doing is keeping me alive because finally I have a goal in my life and your helping me doing it. Thank you a lot from my eye.
hi friends hope your all well, friends I'm trying to my a living from this work and I refine from computer scrap, can someone help me to observe some practiced suppliers because just scammers I'm finding. Please if someone tin delight me I need some proficient contacts thanks a lot. ?
Detect some expert suppliers of what?
Of flake Rams,CPUs ect...
If anyone can please, much appreciated ?
hi dear friend ? get-go of all I would like to wish you lot happy Christmas and a happy new year.
I need to know how to cook the borax from the gold after I melted, tin can someone aid me please?
Thanks a lot.
Sorry.....How to split up the borax from the gold after melting? Thanks
Even though these posts I am commenting on today are 3 years quondam, people withal read and rely on them.
All of the comments related to Johnny D'south question concerning inconsistent results are skilful - but it is of the utmost importance that we determine the chemic composition of the "ore" AND whether or not Johnny has properly pulverized and cleaned his ore of various natural elements and compounds such as base of operations metals, K+, P+, Mg+ and peculiarly the cracking interfering and often ignored chemical element Ca+. Nitric Acrid is the merely agent that will dissolve salts and base metals without dissolving fairly pure gilt. Unless we thoroughly wash our ore with nitric acid, we will non be eliminating annihilation ... Regardless of how much gold might be nowadays in our ore, unless the aqua regia (recommended over HCL & Bleach when dealing with ore rather than jewelry flake) can freely react with the gold present, we will spin your wheels and go "consistently inconsistent" results that will bulldoze usa crazy. Our lab works microscopic Au, Pt, Ir recovery from desert ore and our standard procedures follow at least ii HNO3 washings through fritted glass micropore filters (so not to wash away microscopic Au particles). The HNO3-washed ore - while remaining in the fritted filter - is and so cleansed with boiling Water. Fifty-fifty though using G4 fritted filter, microscopic Au gets through with the boiling water and precipitates on its own in the filtered H2O beneath. Finally, the undisturbed washed-ore - while even so remaining in the fritted filter - is then directly subjected to "very hot" AR soln. The recovered beautiful yellow AuCl solution is so evaporated to remove backlog HNO3 and reconstituted with H2O, monitored with electronic PH /MV meter to ensure a PH of at least "above i.nine" - then finally subject to SMB ppt. This procedure consistently yields 65-80% Au with remainders of Pt and Ir. A comment nearly PH's every bit related to strong acid solutions. Strong acid solutions have PH's that go "below" the standard 1-10 scale, then past the time you neutralized a strongly acidic AuCl solution to a PH of 1.9, it is out of the strong acrid range and thus practical for ppt with SMB.
so when cleaning the gilt dirt with clean muriatic acrid which is the gilded and which is the other metals,,. i added fresh muriatic started turning dark with a light colored sedement in bottom this is muriatic/nitric dropped with lye and cleaned with fresh muriatic
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