Add excess iron powder, aluminum powder or zinc powder, whatever metal is cheap to add, you can replace gold.
With copper powder, displacement reaction, so that copper dissolved in aqua regia, gold is replaced.
Chemist Bohr put his Nobel medal into "Aqua regia", after a series of reactions to produce tetrachloroalloying acid, and then heated the tetrachloroalloying acid to produce gold precipitation and hydrogen chloride gas.is the use of aqua regia to dissolve low-grade gold and replace the gold with zinc. Until the advent of modern chemistry, peopleThe waste gold-plated parts are stirred until the gold layer of the gold-plated parts is completely dissolved (generally in 10-120 minutes), and then filtered, the solution is taken and neutralized with 5% sodium hydroxide to a PH of 15-- 12.
The reaction of ammonium bisulfate (NH4HSO4) with sodium hydroxide (NaOH) produces two products: ammonia (NH3) and water (H2O).Based on the molar mass and reaction ratio of ammonium bisulfate and sodium hydroxide, the number of moles required for both is calculated and which is the limiting reactant is determined. Slowly pour the limiting reactant solution into another beaker and observeReaction phenomenon.
Iron, aluminum and zinc are active metals and can be extracted by displacement reaction like wet copper picking. Cooked gold is gold after smelting and purification, generally higher purity, finer density, and some can be directly used for industrial production.
Reaction equation of ammonia bisulphate and sodium hydroxide: NH4HSO4 NaOH = Na2SO4 H2O NH3 Supplement: NH4HSO4: NaOH 1:1, H in NH4HSO4 and OH- in NaOH just complete the reaction, there is no excess OH- and NH4 combined to form ammonia.
The NaCN-H2O system is used in the metallization mill for the recovery of precious gold from waste electronic components. To dissolve the gold coating on the waste components, replace it with iron orRecovery of gold by sodium sulfite reduction. Acidizing with sulfuric acid and oxidizing with potassium chlorate to regenerate iodine. A new process of electrolytic gold refund has been developed in the Institute of recycling and Utilization of materials.
Is true. CPU replacement speed is very fast, once it is eliminated, it becomes electronic waste, worthless. But you may not know that the CPU hidden in the past two years of rapid appreciation of precious metals - gold.
Fang's gold extraction technology is founded by Mr. Fang Xiaoling in 1999, after more than ten years of research and summary of a set of gold extraction technology. In the e-waste gold extraction industry, it is known for its expertise in technology.
Liu's gold extraction is a relatively cold e-waste gold extraction technology, which uses gold extraction from e-waste to create income.
The steps to extract gold from old mobile phones are as follows: Materials: mobile phones, glass jars, nitric acid. Take out all the used phones you have ready. Lift the phone case, take out the motherboard, and then pull all the things off the motherboard. Remove all the electronic components from the motherboard, leaving only a complete motherboard.
Cell phone YesGold can be refined, some parts of the mobile phone contains a lot of gold, silver, copper and other substances, the average smartphone to use 0.03 grams of gold, the gold is mainly used for circuit boards and other internal accessories. The gold extraction method in the phone: Open the phone shell with a screwdriver and take out the circuit board.
Commonly used equipment for extracting gold are large electroplating complete sets of equipment, gold and silver electrolytic recycling machine, fume hood, water pouring machine, glass reactor, king water filter truck, PH automatic dosing system, reduction filter machine, sponge gold filter bucket and so on.