Step by step demonstration showing how to construct and operate a sulfuric acid stripping cell to de-plate gold plated jewelry. The complete process includin...

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It is only concentrated nitric acid that will passivate iron. I think those that didn't dissolve were hardened steel or iron alloyed with gold/silver/copper. I do not really know yet . I will process another set of filings next week. I'll try to put some sulfuric in it and see how it goes.

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In this video I demonstrate how to make nitric acid for gold and silver refining.

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Parting Gold-Silver Alloy with Sulphuric Acid. Alloys of 10 grains of gold, assaying 9992, were taken, and alloyed with 10, 15, 20 grains of fine silver respectively. 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 ...

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For good results, use a 1:10 rato of 70% nitric acid to 98.5% concentrated sulfuric. Essentially, there can be no water in the reaction! __ While this mixture of sulfuric and nitric acids can slowly corrode gold cold, the reaction is very slow unless heated. Even in the hot boiling mixed acids, the gold takes several minutes to dissolve.

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Sulfuric acid should be 1 inch above from ic chips. Now give a normal flame heat. If you give a strong heat then ic chips will stuck and can't process anymore. After some time, dissolving will start in H2SO4. If your acid starts to boil and increase its volume with black y acid. Add more sulfuric acid to get the black . When acid ...

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From the economy with which this system of parting can be practised, silver containing only 0.5 part of gold per 1,000 can be separated from it at a profit, while the nitric acid process is unremunerative if applied to an auriferous silver alloy containing one part of gold …

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Next step would be dilute the solution by adding some distilled water, decant, rinse well, decant, then adding dilute sulfuric acid ( 50/50 sulfuric and water ), to the meta stannic acid ( tin paste ), this will remove the nitric left from previous process, so then dissolve the gold …

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It helps in gold smelting. Sulfuric acid is used for gold recovery from ic chips in E-waste recycling. Nitric acid (aqua fortis and spirit of niter), commercial grade concentration 68% in water, removes base metals and is used in aqua regia. Hydrochloric acid 32% is used in e-waste recycling and is the main part of aqua regia. Aqua Regia is a ...

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Sulfuric acid should be 1 inch above from ic chips. Now give a normal flame heat. If you give a strong heat then ic chips will stuck and can't process anymore. After some time, dissolving will start in H2SO4. If your acid starts to boil and increase its volume with black y acid. Add more sulfuric acid to get the black . When acid ...

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First immerse the end of the stirring rod in the acid. Remove it and touch that end to a paper towel to make a wet spot. Put a drop of gold detection liquid on the wet spot on the paper towel. If any gold is still dissolved in the acid, the wet spot will turn a purple-black or a purple-brown.

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