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Sunday, August 9, 2020 | History

2 edition of Recovery of mercury from concentrates by cupric chloride leaching and aqueous electrolysis found in the catalog.

Recovery of mercury from concentrates by cupric chloride leaching and aqueous electrolysis

J. E. Murphy

Recovery of mercury from concentrates by cupric chloride leaching and aqueous electrolysis

by J. E. Murphy

  • 176 Want to read
  • 36 Currently reading

Published by U.S. Dept. of the Interior, Bureau of Mines in Pittsburgh, Pa .
Written in English

    Subjects:
  • Mercury -- Metallurgy.,
  • Leaching.,
  • Electrolysis.

  • Edition Notes

    Bibliography: p. 9.

    Statementby J.E. Murphy, H.G. Henry, and J.A. Eisele.
    SeriesReport of investigations ;, 9140, Report of investigations (United States. Bureau of Mines) ;, 9140.
    ContributionsHenry, H. G., Eisele, J. A.
    Classifications
    LC ClassificationsTN23 .U43 no. 9140, TN790 .U43 no. 9140
    The Physical Object
    Pagination9 p. :
    ID Numbers
    Open LibraryOL2392389M
    LC Control Number87021859

      Mercury(II) chloride or mercuric chloride (archaically, corrosive sublimate) is the chemical compound of mercury and chlorine with the formula HgCl2. This white crystalline solid is a laboratory reagent and a molecular compound. Once used as a treatment for syphilis, it is no longer used for medicinal purposes because of mercury toxicity and the availability of. Cupric chloride leaching experiments on both chalcopyrite concentrate and cupric sulfide indicated that the extent of cuprous ion formation in these aqueous cupric chloride solutions is controlled.

    Mercury processing - Mercury processing - Extraction and refining: The pyrometallurgical extraction of mercury from its ore is essentially a distillation process. When heat is applied to the sulfide ore in the presence of air, oxygen combines with the sulfur to form sulfur dioxide, and the metal is liberated at a temperature above its boiling point. The anode reaction involves chloride ion being converted to chorine gas. Mercury flows over the steel base of the cell and, in this way, the mercury acts as the cathode. Sodium is released in preference to hydrogen on the mercury surface, the sodium dissolving in the mercury.

    The Gold Miners Book 75 Gold Recovery Methods GPPI. In general, the methods reported for the recovery of silver from lms involve two steps; the rst is the separation of the silver from the lm base, and the second the recovery of the silver by smelting or electrolysis. More Detail Gold Recovery Beginners Guide Ewaste Recycling. / Industrial use of mercury, a highly toxic metal, has led to significant mercury pollution of the environment (4, 16).Cleanup technologies which are capable of treating large volumes of soil, water, or sediment contaminated with relatively low levels of mercury in a cost-effective way are urgently needed ().The potential of the microbial mer operon-based resistance mechanism, which functions by.


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Recovery of mercury from concentrates by cupric chloride leaching and aqueous electrolysis by J. E. Murphy Download PDF EPUB FB2

Table of ContentsEquipment and MaterialsProcedures and ResultsElectrolysis Tests in 7-A CellElectrolysis in A CellLeachingMercury Removal from WastewaterImproved Process for Mercury Extraction from Concentrates The Bureau of Mines and the Nevada Bureau of Mines have investigated hydrometallurgical methods for recovering mercury metal from sulfide concentrates.

Most recently. Recovery of Mercury from Concentrates by Cupric Chloride Leaching and Aqueous Electrolysis.

Authors The pregnant solution, typically containing g/l hg, was sent to electrolysis to produce high-purity mercury metal and chlorine for recycle. In a a electrolytic cell operated for 24 h, current efficiency was 99 pct, and the energy.

Copper(II) bromide in aqueous sodium bromide solution is shown to be an effective leaching agent for copper sulfides and ore concentrates. Furthermore, a flowsheet based on cupric bromide leaching is suggested for recovering copper from sulfide concentrates and by: 5.

In general, recovery of copper from copper(I) bromide/sodium bromide electrolytes appears feasible and might be improved by applying much of the other information arising from research on copper (I) chloride electrolysis. As with the copper (II) chloride process, the material balance must be adjusted because of the dissolution of concomitant Cited by: 5.

The invention relates to a method for recovering gold from a sulphidic concentrate, particularly one containing arsenopyrite and/or pyrite, hydro-metallurgically. The concentrate is first subjected to leaching with a concentrated solution of alkali chloride and copper (II) chloride, by means of which the copper minerals and some of the gold in the concentrate are made to by: Mercury chloride (HgCl2) is a highly toxic compound that volatizes slightly at ordinary temperature and appreciably at degrees C.

It is corrosive to mucous membranes and used as a topical antiseptic and disinfectant. Mercuric chloride was used to disinfect wounds by Arab physicians in the Middle Ages but modern medicine has since deemed it unsafe for use.

The method for recovering zinc metal from zinc minerals includes leaching zinc minerals to leach zinc into solution with a solution comprising halide species formed of two or more different halides.

The zinc containing solution is then electrolyzed to produce zinc metal and generate halide species. The electrolyzed solution containing halide species returns to the leaching step.

Explore the latest full-text research PDFs, articles, conference papers, preprints and more on GRAMS. Find methods information, sources, references or conduct a literature review on GRAMS.

To make the cupric chloride solution, he dissolves a bunch of copper wire in hydrochloric acid, and mentions maybe using hydrogen peroxide to speed up the oxidation, but doesn't go into detail. Which got me thinking. You didn't have any cupric chloride yet, but you can make it by dissolving copper.

Dissolving copper is the name of the etching game. Explore the latest full-text research PDFs, articles, conference papers, preprints and more on CPAP.

Find methods information, sources, references or conduct a literature review on CPAP. copper(ii) chloride soln can be prepared by direct metathesis using, eg copper(ii) sulfate and barium chloride.

Kirk-Othmer Encyclopedia of Chemical Technology. 3rd ed., Volumes New York, NY: John Wiley and Sons,p. Mercury processing, preparation of the ore for use in various products. Mercury (Hg) has a unique combination of physical properties. Its low melting point (− °C [−38 °F]) and boiling point ( °C [ °F]), high specific gravity ( grams per cubic centimetre), uniform volume expansion.

Tin is widely used in solder, tin plating and tin alloys. The current recovery rate of tin metal is low and insufficient with just overtonnes annually.

The grade of tin concentrates in traditional smelting methods needs to be at least 60%. Otherwise, iron, the chief impurity in tin concentrates can form tin-iron alloys and result in inefficient recovery of tin. Therefore, a.

Mercury(II) chloride or mercuric chloride (historically "corrosive sublimate") is the chemical compound of mercury and chlorine with the formula HgCl is white crystalline solid and is a laboratory reagent and a molecular compound that is very toxic to humans.

Once used as a treatment for syphilis, it is no longer used for medicinal purposes because of mercury toxicity and the availability. Here, non-aqueous is not used to imply anhydrous, but rather a low water content.

The unit operations are as follows: solvent leaching; separation of the residue; purification of the leach solution by non-aqueous solvent extraction or non-aqueous ion exchange; and metal recovery by precipitation or electrolysis in non-aqueous electrolytes.

Mercury is one of the most toxic heavy metals in existence. It is toxic at one in one billion-part quantities. Just like chemical toxicity, heavy metal toxicity has become one of the most dangerous health hazards nowadays.

Removal of these heavy. The ore pany, Colorado. is crushed and roasted, and is first then leached with a solution containing free chlorine and This leaching solution bromine.

of a strong brine, containing The sodium chloride. in this way from is produced by electrolysis sodium bromide in addition to solution of gold the leaching vats is and silver obtained then passed.

We are world leaders in activated carbon solutions for mercury removal, with a commitment to research and development initiatives that drive down the cost of mercury capture.

Calgon Carbon is committed to helping plant owners and operators meet increasingly stringent environmental regulations in the most economical way possible.

As supplies of high-grade base metal concentrates diminish, the treatment of complex sulphide materials, which often contain a significant fraction of silver must be considered. Acid pressure oxidation is a promising process for these materials and silver recovery will play a major role in the economy of the process.

However, in acid pressure oxidation processing, silver is incorporated into. Mercury(I) chloride is the chemical compound with the formula Hg 2 Cl 2. Also known as the mineral calomel (a rare mineral) or mercurous chloride, this dense white or yellowish-white, odorless solid is the principal example of a mercury(I) compound.

It is a component. The lignin-mercury colloid is then coagulated through the addition of a flocculating agent such as ferric chloride. Under optimized conditions, a clean effluent is produced with a residual mercury level of less than 1µg/L, together with a ferric sludge that is not leachable by TCLP (Toxicity Characteristic Leaching Procedure, EPA Method ).Abstract: A method for leaching one or more target metals from a sulfide ore and/or concentrate containing such, the method comprising the steps of: (a) Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidising species in which the hypochlorous acid comprises at least 10 mol % of the chlorine-based oxidising species; (b) Allowing and/or facilitating the oxidation.Copper Electrowinning.

Typical of electrowinning from aqueous solutions is copper electrowinning. The electrolyte entering the cells contains 25–60 g l-1 of copper, 50– g l-1 of sulfuric acid, and 5–10 g l-1 of iron salts (Habashi, ). It is produced by leaching of copper ores, with solution purification by solvent extraction.