refining zinc with acids

Treatment processes in petroleum refining

Treating in petroleum refining is a means by which contaminants such as organic compounds containing sulfur, nitrogen, and oxygen; ... Treating materials include acids, solvents, alkalis, oxidizing, and adsorption agents. Acid, Caustic, or Clay Treating ... charcoal absorption to high-temperature catalytic hydrogenation followed by zinc oxide ...

ch 9 chemistry Flashcards | Quizlet

In the first step of refining Zinc metal from its Zinc sulfide ore, the ore {Zn} is heated in the presence of oxygen {O₂}. The products are solid zinc oxide {ZnO} and sulfur dioxide gas {SO₂}. (For each of the following chemical reactions,write a word equation, a skeleton …

30 Egypt.J.Chem. Vol. 62

refining agents in the order; aluminum turnings > zinc powder > Al/Zn mixture [7]. Iron is present within hard zinc as intermetallic compounds. The addition of the refining agents to the hard zinc melt resulted in the formation of different Recovery of Zinc from Zinc Dross Using Pyrometallurgical and Electrochemical Methods

Electrolytic Refining - Mineral Processing & Metallurgy

The Parkes process, patented in 1850 uses molten zinc. Zinc is not miscible with lead and when the two molten metals are mixed the zinc separates and floats to the top carrying only some 2% lead. However silver preferentially dissolves in zinc, so the zinc that floats …

Zinc smelting - Wikipedia

Zinc smelting is the process of converting zinc concentrates (ores that contain zinc) into pure zinc. Zinc smelting has historically been more difficult than the smelting of other metals, e.g. iron, because in contrast, zinc has a low boiling point.At temperatures typically used for smelting metals, zinc is a gas that will escape from a furnace with the flue gas and be lost, unless specific ...

Gold Recovery Correctly : 12 Steps - Instructables

Cadmium is classified by OSHA, NIOSH, and EPA as a potential human carcinogen Disposing of your waste acids. Place your acid in a separate container, I choose used 2 liter or 3 liter bottles, Label these bottles as CLCu2 with a black sharpie marker. under that write may also contain trace amounts of NICKLE and ZINC, BERYLLIUM, CADMIUM and LEAD ...

Zinc Electroplating | Products Finishing

Feb 18, 2011· Zinc/nickel alloy deposits can be produced using either an alkaline or chloride process. The alkaline zinc nickel has a higher operating cost than the acid zinc nickel, mainly because of the lack of soluble nickel anodes in the alkaline system. They are not possible in the alkaline systems.

Refining of Metals | Article about Refining of Metals by ...

Chemical refining. Chemical refining is based on the different solubilities of a metal and its impurities in acid or alkaline solutions. Impurities gradually accumulate in a solution and are removed by chemical means, such as hydrolysis, cementation, the formation of sparingly soluble compounds, and purification by extraction or ion exchange.

Extraction of gallium and germanium from zinc refinery ...

Pressure acid leaching of zinc refinery residues containing 0.266 wt.% Ga and 0.363 wt.% Ge was performed. The effects of the experimental parameters on the leaching of gallium and germanium and the filtration performance of the leach slurry were systematically investigated.

Zinc - Essential Chemical Industry

Zinc sulfide also reacts with sulfuric acid under these conditions: As shown in the equation, the process also produces sulfur as the element, and this can be used to make the sulfuric acid required. Bioleaching. Very high zinc extraction rates (up to 99%) from low-grade ores (as low as only 5% zinc) can also be achieved using bacterial action.

Precious Metal Refining - Ganoksin Jewelry Making Community

In the case of precious metal refining, it is generally more efficient to send scrap to a reputable refiner. Find out more about precious metal refining. ... The sediment is next mixed with dilute sulfuric acid and zinc is added to a point of saturation. This will precipitate silver according to the following equation.

Zinc processing - Ores | Britannica

Zinc processing - Zinc processing - Ores: Zinc ores are widely distributed throughout the world, although more than 40 percent of the world's output originates in North America and Australia. The common zinc-containing minerals are the zinc sulfide known as zinc blende or sphalerite (ZnS), a ferrous form of zinc blende known as marmatite [(ZnFe)S], and a zinc carbonate known as calamine or ...

CPC Scheme - C22B PRODUCTION AND REFINING OF METALS ...

{using acids of the carboxylic type or derivatives thereof, e.g. amino acids, nitriles, amides, hydroxamic acids} [2013-01] ... {Refining solutions containing zinc values, e.g. obtained by leaching zinc ores (treatment or purification of solutions by liquid-liquid extraction, ...