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Large Scale Gold Refining By the Aqua Regia Acid Method

The gold refining technique described here is the rather ancient wet chemical . The reaction of the aquaregia with the metals in the scrap produces nitrogen oxides. . by adding a small amount (say ~ teaspoonful or less) of sodium nitrate.

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Solution for precipitating gold from HAuCl4 solution Finishing

My company will begin to use aqua regia process for refining gold; can you give .. I am using hydrochloric acid and sodium nitrate instead of nitric due to the 

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Aqua Regia ph [Archive] AlloyAvenue network

Keep all filtrate and precipitate out with sodium chloride or HCl your silver values. If there is Aqua Regia is mainly used in small scale gold refining and recovery. I know of My guess Pb chlorides and nitrates. Could use 

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25 lb Sodium Nitrate 99 % Purity High Quality Tech Grade Gold

High Quality Technical Grade Sodium Nitrate, 99 % Pure; Use for making Aqua Regia in Gold Refining & Other Metal Refining; Recovery of Precious Metals 

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Making aqua regia [Archive] GoldSilver Forums

an interesting question, but my use for aqua regia is to test gold, rather than Aqua regia forms naturally from nitrates in the soil and acids in rain. would lye (sodium hydroxide) be a useful substance, given that it's extremely CC, no dogs from here either, i think this (and the gold refining forum) are both 

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A Poor Man's Method of Smelting Gold Sciencing

Sodium nitrate, silica and sulfuric acid cause this reaction. All of these are easily attainable at a hardware store or you could use items such as borax 

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Patent US6337056 Process for refining noble metals from Google

Jan 8, 2002 refining the gold, palladium, platinum and silver. said solution containing gold, platinum, palladium, and nonnoble metals with an aqueous . borax, wood charcoal, sodium bisulfite, sodium nitrate and sodium metasilicate.

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General Reaction List Gold Refining Forum.com

AR Recipe 2= Poor Man's AR = 8 oz Sodium Nitrate (added in small increments),(aka If gold is present drop with SMB, NO urea needed.

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Gold Encyclopedia Theodora.com

With regard to the history of the metallurgy of gold, it may be mentioned that, acid, antimonious acid, peroxides and nitrates, and of nitric acid with a chloride. .. NaAuS 4H 2 O, is prepared by fusing gold with sodium sulphide and sulphur, the .. Gold in galena or other lead ores is invariably recovered in the refining or 

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Basement Chemistry for the Prospector Assaying and Smelting

Of course, our client who is a prospector immediately asks "how much gold" .. Furnace smelting is usually carried out using a crucible made of graphite (a crystal was oxidized to iron nitrate by the sodium nitrate and is now dissolved in the 

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Sodium nitrate Wikipedia

Sodium nitrate is the chemical compound with the formula NaNO3. This alkali metal . Hobbyist gold refiners use sodium nitrate to make a hybrid aqua regia that dissolves gold and other metals. Sodium nitrate is also a food 

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CR4 Thread Gold flake/foil refining

Sep 7, 2007 I use battery acid and sodium nitrate warmed up on an electric plate to 7080 celsius to make nitric acid, that dissolves every thing but not gold.

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POOR MANS AQUA REGIA HOW TO MAKE AQUA REGIA FAST

Jan 13, 2013 Acid to 50 Grams Of Ammonia Nitrate you Can use Sodium Nitrate to How to Easily Refine & Smelt Gold from Computer Memory Chips 

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Solution for precipitating gold from HAuCl4 solution Finishing

My company will begin to use aqua regia process for refining gold; can you give .. I am using hydrochloric acid and sodium nitrate instead of nitric due to the 

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Refining Gold with Sulphuric Acid Mineral Processing / Metallurgy

Mar 24, 2016 1 Parting GoldSilver Alloy with Sulphuric Acid; 2 GoldZinc Alloys . and sulphuric acid again added, with a few crystals of sodium nitrate.

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Tom's Hardware Recovers Gold And Silver From CPUs TechPowerUp Forums

Silver is in the solution as silver nitrate (AgNO3), whereas the gold and a few other metals For that, we use powdered sodium metabisulfite.

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Na2SO3 2HCl 2NaCl SO2 H2O TeacherWeb

Lead() nitrate reacts with potassium iodide to produce lead() iodide and .. as sodium cyanide, NaCN, are especially useful in gold refining because they will 

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platinum group chemical element group Britannica.com

Sep 5, 2013 References to gray, dense pebbles associated with alluvial gold fire refining, the platinum metals require complex aqueous chemical . is fused with alkali nitrate salts to convert ruthenium to soluble sodium ruthenate.

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Gold refining from Scrap by Ian Begg APSense

Mar 13, 2010 If plated heavy I use a homemade nitric acid sodium nitrate (Na(NO3)2) and battery acid (H2SO4) 11 ratio, I use store bought H2SO4 as it 

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Aqua Regia [Archive] Alchemy Forums

And I'll tell you why , back when I first started refining gold via the aqua regia . We add sodium bisulfite in equal quantites with the gold that we think is Using ammonium nitrate solution in a narrow necked flask with some 

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Chile's Mining and Chemicals Industries AIChE

compounds (nitrates, iodine, lithium products, sodium chloride), combustibles copper, gold, silver, and iron deposits, as well as salt lake mineral byproducts 

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Sciencemadness Discussion Board more gold refining questions

I don't know much about gold refining from circuitboards, though. I expect that most of the copper is in Solution B as copper nitrate evaporate B and C and drop whatever gold is in both with sodium metabisulfite.what i hate 

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p. 124.pdf

gold purity obtained will vary depending on refining technique and operating skill ii) Sulphuric acid which reacts with sodium nitrate by generating nitrous 

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General Reaction List Gold Refining Forum.com

AR Recipe 2= Poor Man's AR = 8 oz Sodium Nitrate (added in small increments),(aka If gold is present drop with SMB, NO urea needed.

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POOR MANS AQUA REGIA HOW TO MAKE AQUA REGIA FAST

Jan 13, 2013 Acid to 50 Grams Of Ammonia Nitrate you Can use Sodium Nitrate to How to Easily Refine & Smelt Gold from Computer Memory Chips 

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