Aqua Regia vs. Acid Peroxide.
I'm curious as to why you guys use Acid Peroxide instead of Aqua Regia in the first step (most of you). It seems to me that Aqua Regia skips a step in the process by dissolving the gold in step #1. Whereas with Acid Peroxide you have to strip the foils, then dissolve them with Acid/Chlorine in...
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Maximum metals solubility in Aqua Regia
Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. Noxx Well-known member. Joined Feb 24, 2007 ... In one gallon of 4/1 aqua regia, you can dissolve about 2# of most metals. This includes copper, nickel, iron, most other base metals, and gold, or a combination of ...
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Refining Solutions for the Goldsmith Sector
Dual System Gold Refining Plant 15+15 kg
Optimize gold recovery with our dual system refining plant, processing up to 30 kg with Aqua Regia method.
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Aqua Regia Refining
A self-contained aqua regia refining plant using a rotating polypropylene drum. Aqua regia (royal water) is the name given to a mixture concentrated hydrochloric and nitric acids (in a ratio of 3:1 respectively). It has been known …
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Aqua Regia Gold Refining plant
Our aqua regia gold refining plant are built using the most advanced technologies and the highest quality raw materials, in total accordance with international safety standards. The …
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MX3, A Replacement for Nitric Acid in Aqua Regia | Gold Refining …
Hello all, While browsing the internet i stumbled upon a product that claims to be a substitute for Nitric Acid in Aqua Regia. This Chemical is called MX3, but im having trouble determining the actual contents of the white powder that claims to be "A superior, dry, non-hazardous substitute for nitric acid when making aqua regia."
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MY AQUA REGIA
(The chlorine gasses can carry gold) When eliminating the nitric from aqua regia you want a slow evaporation process (I AM SCREAMING AT YOU NOT BOILING), yes many times you have read to boil but that was a false term to describe the process, slow heat evaporation would be a better term to use, a steam bath (pot of boiling water with beaker ...
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Does aqua regia just dissolve gold? | Gold Refining
I do aqua regia by adding 60 ml HCL and 20 ml nitric. I don't mix Aqua Regia (AR) in a ratio, I use only enough Hydrochloric to cover the material and use nitric in small additions so I don't leave a large excess to be wasted later. I add other metals, including gold, to the middle of the aqua regia solution.Let's filter again,Then add some ...
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HOW MUCH TIME TO PUT AQUA REGIA WITH DESOLVED …
thanks for reply, I was first cleaning e-west specially only gold leaf, other trash removed by nitric acid and sulfuric acid bath, prepare aqua regia on 1:3 ratio of HNO3+HCl then put my e west in glass container. within 1 to 2 hours all gold are dissolved in AR. then filter twice with filter paper,AR solution are become dark golden yellow( 900ml). all chemical use are lab …
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what % of Urea is needed to stop aqua regia reaction
I have some plant food that's 20.5 % Urea. It is derived from Urea, ammoniam phosphates, and Urea phosphates. The other things in it are, muriate of pot ash, boric acid, copper sulfate, iorn EDTA, manganese EDTA, sodium molybdate, zink sulfate, and chlorine (C) Max. 12 %. Can anybody tell me if this is OK to use to stop the reaction of aqua regia.
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Silver Problem from Aqua Regia Process | Gold Refining
Silver Problem from Aqua Regia Process. Thread starter dennyhb94; Start date May 7, 2021; ... I tried refining the gold twice in the AR solution but the result is the same, 999.7 gold. Please help me on how to improve my process to get 999.9 gold or perhaps there's some steps that I'm missing.
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Aqua regia a lot of SMB...
Aqua regia can be 4 to 1 .or. 3 to 1 or just drop by drop nitric . You need heat .stannous chloride .very important and urea to make sure you don't have access nitric .and then precipitation . You have to do it step by step .and test with stanouss as you go .and it's deferent factor if you have other metal with gold
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Why Red Aqua Regia ?? | Gold Refining & Metal Extraction …
Hii My aqua regia colour Red and why can be red ? And I can be understanding metal type from aqua regia colour? Forums. New posts Search forums. What's new. New posts Latest activity. Members. Registered members Current visitors. ... That brings to mind an experience I had early on in my refining days. A fellow that scrapped electronic things ...
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When and what is the best way to filter aqua regia?
NOW I'M HOOKED. I bought ishor's aqua regia products. Subzero (nitric acid substitute), Storm Gold percipitant, gold purity test drops, test for dissolved gold. I did my first batch but didnt take my time nor did I get any advice and I completly screwed up that batch. Learning my lesson I, I have a few questions for you more experienced w/ aqua ...
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Aqua Regia 1
No modern refinery worth its salt predominately uses acidic refining, aka Aqua Regia. We certainly don't. If they are, I would avoid them like the plague because the costs as reflected in their refining charges would price them out of the competitive refining environment. If you want to talk just on the acidic side of the pH scale, then I ...
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Precipitating gold out of Aqua Regia | Gold Refining
hello, i saw your video too, but when i put the Aqua regia on the processors it becames black or dark green . Is not good my aqua regia ? how much nitric acid should i put on hydrochloric acid ? 1 part of nitric acid at 3 parts of hydrochloric acid ? to turn it yellow like yours when i put it on the microprocessors ? ... AuCl3 and HAuCl4 are ...
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Scrubber Design | Gold Refining & Metal Extraction Forum
Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. T. Tahmoures Active member. Joined Dec 20, 2021 ... I'm using nitric acid for base metals, aqua regia for dissolving gold and sodium metabisulfite for precipitating the gold so I have NO, NO2, Cl and SO2 fumes. ...
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Aqua Regia Gold Refining Plant Set Up
gold and silver refining machines . NEW AQUA REGIA TYPE IAP/20Pt PLATINUM REFINING PLANT 2Kg/day GOLD REFINING TUMBLER IAOBR800 50 100Kg per day Gold & Silver to 999 9 We can supply you gold refinery from 1kg up to 6kg at a time and silver refinery from 10kg up to 40kgs at a >>Chat online VPMR gold and silver refining machines and Equipment
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stuck in aqua regia process
Aqua regia is used for refining gold, very seldom used for recovery of gold from scrap metals. With ore trying to recover gold using aqua regia would almost always be a very bad idea. A stone or ore can be composed of many different elements, some of which can produce deadly gases (arsenic for example), many compounds of the ore even if gold is ...
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Can Gold Dust be refined by using Aqua Regia
Aqua regia is used to dissolve the gold into solution (the acids remove electrons from the gold atoms) and the gold forms a dissolved solution of yellow colored gold ions (a dissolved salt of gold), this also dissolve the very little metal impurity that the nitric could not get to, the nitric acid content of the aqua regia acts as an oxidizer ...
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Aqua Regia method & Gray Ag powder
The scrap we deal with on a regular basis contains Au, Ag, Pt, Pd and other metals. Because the Ag level of this alloy is usualy around 10% we go directly into Aqua Regia with the shot. After the shot is digested in aqua regia and filtered and rinsed we are left with a gray colored powdery precipitate.
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aqua regia/sub zero users
It is non-selective and pulls everything out. It won't pull out anything that isn't already in solution. It's a great product to treat your effluent to remove the last traces of metals before you discharge it or recycle the water back into the process. From a refining standpoint, it's useless except as a scavenging agent.
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Aqua Regia used in recovery
I'm one of those idiots or morons that uses aqua regia as a primary recovery step. Its the fastest way I've found to recover gold from board fingers and ceramic cpus, which is …
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How dangerous is Aqua regia
NO2, the red fumes produced from dissolving metals in nitric or aqua regia, rats seemingly have an LD50 of 88 ppm over a 4 hour exposure. That's a little less than 1 part NO2 per 10,000 parts of air. LD50 (lethal doze for 50%) means that 50% of the rats exposed to that dosage will die.
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Aqua Regia without inquarting for 18k gold 1oz
This will dissolve the silver chloride. 2, The clean gold solids should be weighed, and inquarted in silver. 3, The silver / gold alloy should be parted in 50% nitric acid (half nitric half distilled water.) 4, The solids should be collected and rinsed and dissolved in aqua regia. 5, Filter the aqua regia and mix it with the original aqua regia ...
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Aqua Regia re-use | Gold Refining & Metal Extraction Forum
Free gold on quartz can be extracted with aqua regia (aqua regia on most gold ores would not only be foolish but a waste of time and money). I would first separated as much …
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Fe and Au on Aqua Regia
I have a problem the Gold and Fe now on Aqua Regia. I need to ask, any chance to get the gold only on that AR without get the Fe? The other words, how to take the gold only from AR? ... it's called refining. 8) Listen on Butcher, he gives good advice. Göran . Reply. j2000 Well-known member. Joined Feb 8, 2014 Messages 50 Location Indonesia ...
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Aqua Regia neutralization with Sodium Hydroxide | Gold Refining …
Aqua Regia neutralization with Sodium Hydroxide. Thread starter Aberu_ Start date Feb 25, 2018; ... AR is not a solution for leaching ore, it is for refining after. AR will dissolve and free all kind of toxic elements from what is in the ore. For ore: Cyanide complexes, hypochlorites, thiocyanates or others are used based on the composition of ...
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aqua regia and alluminum foil
I made AR to refining gold from 500mg black sand and I put aluminum foil in it (after filtering) 15 grams but it can't disolving complete. I can't precipitate with SMB. ... You had gold and iron in solution, if you would have removed free nitric acid from the aqua regia, diluted, and filtered off the solution, and then have used ferrous sulfate ...
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Extracting Gold from Ore by Aqua Regia method
Hi Guys, Basically, I am from Egypt and our government started permitting people to make mining in gold mines I am a chemist and have good background about chemicals usage 7 handling I would like to start doing this business and i want to start refining gold by Aqua Regia method Appreciate if you share with me your experience in this field and the guidelines about …
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