How to Buy Rare-And-Noble-Metal

Rare-And-Noble-Metal are metals that are resistant to corrosion and oxidation in moist air, unlike most base metals. They tend to be precious, often due to their rarity in the Earth's crust. The noble metals are considered to be (in order of increasing atomic number) ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, and gold. It is a metal or alloy, such as gold, that is highly resistant to oxidation and corrosion. Glassy carbon electrodes were coated with the film poly-(p-allyl ether benzenesulfonic acid) by an anodic procedure. Nickel, platinum, and palladium ions were introduced into the film by ion exchange of H+with the corresponding salts.

Platinic metals are excellently catalytic and are used widely as multi-functional catalysts, especially in oil industry. In recent years, platinum and rhenium catalysts are increasingly used and have achieved remarkable economic benefits. Our new technologies that reclaim rare metal from platinum and rhenium require simpler procedures and less equipment and therefore are cost-efficient. The recycling rate of platinum is ≥96.0％, with its purity≥99.95％. The recycling rate of rhenium is ≥85.0％, with its purity≥99.5％. Other sources include mercury or even rhenium as a noble metal. On the other hand, titanium, niobium, and tantalum are not included as noble metals despite the fact that they are very resistant to corrosion.

alladium, platinum, gold and mercury can be dissolved in aqua regia, a highly concentrated mixture of hydrochloric acid and nitric acid, but iridium and silver cannot. (Silver can dissolve in nitric acid though.) Ruthenium can be dissolved in aqua regia only when in the presence of oxygen, while rhodium must be in a fine pulverized form. Niobium and tantalum are resistant to acids, including aqua regia.Processing 50 tons of used platinum and rhenium catalysts requires 240m2 workshop equipped with water, electricity and ventilation equipment. Main equipment: 2 1m3 porcelain enamel reaction tanks, 2 sets of ion exchange instruments. Power: 60～100 kW; Investment: RMB600,000—900,000.

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