First thing is get proficient at making your nitric acid, there are many threads here on the forum about that process. Second is decide how you want to refine the silver. That depends on which form you are getting your silver. The options are dissolve the Silver in your nitric and cement it on copper and make up a cell.
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The information on the forum is not organized. Sure, I can find information on websites but not on the tutorials category of the forum. Usually these posts are set as sticky and are posts that should be made to be fixed with information you know is completely right, not someone that did something and that worked with no good scientific explanation.
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From where cadmium is placed in the reactivity series of metals we see it will dissolve in the nitric acid. and if you used copper to cement the silver the cadnium ions will stay in solution. ... 4 Hole Sizes Metal Silver Casting Melting Templates Ingot, for Melting Casting Refining Gold Silver Copper Aluminum Brass Precious Metals DerJingX. $8 ...
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Inquartation involves initially diluting the gold in the refinable material to about 25% (literally 'quartering' the gold) by melting with the appropriate addition of copper or silver, granulating the melt so as to generate a high surface area …
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H2O2 will be used up by the reaction it self, but also decompose slowly in time. Heat also rapid the H2O2 decomposition. Silver reaction to nitric acid: 3 Ag + 4 HNO 3 = 3 AgNO 3 + NO + 2 H 2 O The NO(g) generated by the reaction with Silver, is re-oxidized by the water (or H2O2) to form back Nitric acid and hydrogen.
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"NOTE: When substituting nitrates for nitric acid in Poorman's AR here are some handy numbers: 1. When used to dissolve gold powders use 4 mL of 31% HCl per gram of gold plus: 1.343 g NaNO3 (sodium nitrate) per gram of gold to be dissolved. or 1.597 g KNO3 (potassium nitrate) per gram of gold to be dissolved. 2.
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HDPE will hold up somewhat, PTFE and other fluoromers are best for ALL acids and that is what I use for my HNO3, HF, H2SO4, SO3, N2H4, Br2, etc. Generally speaking, most non-fluorinated plastics don't hold up well to HNO3 over long periods of time. Or you could just use aluminum. Nitric won't affect aluminum as it is an oxidizing acid.
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Hmm OK so I'm looking into the recovery of gold from e waste, (only researching atm) more as a hobby as I find it interesting, so from my understanding so far, first my pcb or pin strips goes Into hydrochloric acid to which I add hydrogen peroxide to remove any base metals, strain, then put the left over gold foils and bits into aqua regia or hydrochloric acid and bleach …
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Beginners Gold Refining Process Forum . nitric acid. Thread ... i used to buy nitric 42degrees=70%-----at the moment my seller have only nitric36degres=x%----- ... To make 50/50 nitric from 70% nitric, you add 1 liter of acid to 1 liter of water. To make this same exact strength from the 36 baume' (52%) nitric, you add 554ml of water to 1 liter ...
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I recently purchased four 2.5 liter bottles of nitric acid that someone listed here on the forum. It turns out that I lived within 5 miles of them. Amazing. Anyway I got a super deal on the acid, 5 gallons of HCL, and other goodies. The nitric acid included a …
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this is a very broad question and has no simple answer. if you want to distill nitric acid, which makes the best acid for use with silver, you will need potassium nitrate or salt peter. if you want to make "one pot method" nitric acid, then sodium nitrate should be used but this is a poor choice for silver refining. ammonium nitrate should be avoided in reactions involving …
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Hello, I have half a pound of gold fingers, plus lots of gold plated pins, connectors (like wifi antenna ends), and ribbon fingers. Now I'm ready to separate the gold starting with Nitric Acid & distilled water. I attempted to keep my material clean, removing all …
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Silver forms fairly insoluble sulfate's so we need a purer nitric acid, free of sulfates where possible, for use with silver. Some sulfates in nitric or aqua regia are not a problem for gold, or most base metals and the sulfate could be somewhat helpful as it makes lead insoluble in the gold chloride solution.
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I've been trying to make nitric acid for silver recovery. I just started off by melting a few price... Forums. New posts Search forums. What's new. New posts ... 4 Hole Sizes Metal Silver Casting Melting Templates Ingot, for Melting Casting Refining Gold Silver Copper Aluminum Brass Precious Metals DerJingX-36%. $31.99 $49.99. shynek Jewelry ...
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If you are wanting to dissolve away a lot of base metals, then you really need reasonably concentrated Nitric acid, if you are just wanting to refine some foils, the PMAR or …
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Electrolytes seem to vary from a silver nitrate only solution to electrolytes with "some" free nitric acid. "A typical silver-refining acid bath would be 200 grams per liter of silver nitrate and 30 grams per liter of nitric acid (Recovery and Refining of Precious Metals, C.W. Ammen, 1984). What would be an appropriate level of nitric acid to use?
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If I clean this sediment with nitric acid, will nitric acid damage the gold dust . Reply. Martijn Well-known member. Joined Aug 3, 2014 Messages 3,129 Location Netherlands, Zeeland. ... for Melting Casting Refining Gold Silver Copper Aluminum Brass Precious Metals DerJingX. G. goldshark Well-known member Supporting Member. Joined Aug 12, 2021 ...
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Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. T. Toadstool Member. Joined Oct 3, 2015 ... This is a more complex, but better way to produce a more pure Nitric Acid. I wouldn't use the first method in the video, but instead I would use the second method.
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distill off NO2 bubble into water to make nitric acid, if less than 68% concentration can boil off water untill it reach's 68% further boiling will boil off your 68% acid, if stronger acid needed for some unknown reason, you would need to add 2 times the amount of sulfuric acid and distill off somewhere greater than 80% maybe stronger up to fuming acids.if doing this check …
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Oz is totally correct, but not the rest of you. Finely divided gold will not dissolve in diluted or hot nitric acid (0ver 70 Celsius) But finely divided gold will dissolve very, very slowly in cold concentrated nitric acid (grams per year) just enough to color the solution yellow over time.
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Well to conserve on nitric acid and to process large batches (12 pounds) i dont go over that usually, use 4 5000 ml conical flask a stopper and a hose in top in which the nitrogen dioxide gas (red gas of death) travels through from the first hose to the second conical flask where the hose is submerged in the water which turns back into nitric ...
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Limit the amount of nitric used to consume it. (GSP's trick). Use a gold button to consume free nitric acid. (Harold's trick). Leaving some gold undissolved. ( a form of the above method) Three-evaporation method. (Procedure found in Hoke's book). Sulfamic acid to remove free nitric acid. I like to use combinations of these methods.
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Also - if you are using 67 - 68% nitric you first need to dilute the nitric 50/50 nitric/distilled water to dissolve the brass --- do not use tap water to dilute the nitric as the chlorine in tap water will make a week AR and AR will react with both zinc & aluminum
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When you use nitric, the cost will be higher than the yield. For 200 grams of copper or brass pins, you will need 800ml of nitric. From 200 gram plated pins, you can expect 0.5 …
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14K - 4/5 ounce nitric acid - 1/5 ounce dist. water - 10 drops of hydrochloric acid 18K - 1/5 ounce nitric acid - 1/5 ounce dist. water - 3/5 ounce hydrochloric acid ... 4 Hole Sizes Metal Silver Casting Melting Templates Ingot, for Melting Casting Refining Gold Silver Copper Aluminum Brass Precious Metals DerJingX. $6.99.
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It makes sense to me if you take Hydrochloric Acid (HCl) and add Sodium Nitrate (NaNO3) that a similar reaction would take place and the result would be Hydrochloric Acid (HCl) would become Nitric Acid (HNO3) and Sodium Nitrate (NaNO3) would become Sodium Chloride (NaCl)(precipitated). so in my opinion the component of subzero could very well ...
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Each alloy was rolled out in the same manner as was adoped for the nitric acid parting; 20cc of strong sulphuric, 92 per cent., acid was used in each case, and the cornets were boiled for one hour. The resulting gold was much paler in colour than when nitric acid was used on similar alloys.
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what is the least concentrated nitric that can be used in AR? i use 15% nitric (Ph modifier at garden center) to dissolve cheap jewelery. is it good enough for AR? Your nitric …
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68% nitric is all we need to refine with, a dilute nitric acid can be concentrated to 68% easily, this is the approximate azeotrope of nitric acid, you cannot concentrate further than this without special proceedures, as further evaporation will just vapor off 68%. higher concentrations can be made but have no use in refining.
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