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3 edition of Reactions of Copper Sulfide Minerals with Chlorine in an Aqueous System. found in the catalog.

Reactions of Copper Sulfide Minerals with Chlorine in an Aqueous System.

United States. Bureau of Mines.

Reactions of Copper Sulfide Minerals with Chlorine in an Aqueous System.

by United States. Bureau of Mines.

  • 327 Want to read
  • 33 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 7801
ContributionsGroves, R., Smith, P.
ID Numbers
Open LibraryOL21739812M

phases in the copper-sulfur-water system, Int. J. mineral Process. 20 (1 e 2) () e F.A. Caporuscio et al. / Journal of Nuclear Materials ( 7) e The mineral covellite (CuS), found in low-grade ores, is a possible future source of copper. 4 (a) When copper is extracted from covellite, a reaction occurs between copper(II) sulfide and nitric acid to form a dilute solution of copper(II) sulfate. 4 (a) (i) Balance the equation for this reaction.

  Reactions of Copper Sulfide Minerals With Chlorine in an Aqueous System; Groves, R.D., Smith, P.B., , Bureau of Mines Report of Investigations—RI Selective precious metals leaching from a chalcopyrite concentrate using chloride/hypochlorite media; G.V.K Puvvada, D.S.R Murthy, Hydrometallurgy 58 (), 2. In copper processing, a copper anode is an intermediate product from the smelting furnaces which is used as a copper source from which to make copper cathodes during electrolysis. aqueous Of or containing water, typically as a solvent or medium; i.e., an aqueous solution. cation.

Interpretation: To write the molecular equation and net ionic equations for the given reaction. Concept introduction: A chemical equation is the figurative representation of chemical reaction. In a chemical equation the reactants are in the left side and the products are in the right side. Compare the solubility of copper(I) sulfide in each of the following aqueous solutions: Clear All M Cu(NO3)2 More soluble than in pure water M K2S Similar solubility as in pure water M NH4CH3COo Less soluble than in pure water. M KNO3 Submit Answer Retry Entire Group 6 more group attempts remaining.


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Reactions of Copper Sulfide Minerals with Chlorine in an Aqueous System by United States. Bureau of Mines. Download PDF EPUB FB2

Additional Physical Format: Online version: Groves, R.D. (Rees D.). Reactions of copper sulfide minerals with chlorine in an aqueous system. [Washington, D.C.]: U.S. The Bureau of Mines conducted research on reactions of copper sulfide minerals with chlorine in an aqueous system. Selected samples of covellite, chalcopyrite, chalcocite, bornite, and pyrite were leached with aqueous chlorine solutions.

Chlorine gas has not been used directly in the hydrometal- lurgical production of copper and copper compounds, but Groves and Smith [ 13 ] have studied the reactions of copper sulfide minerals, such as covellite, chalcopyrite, chalcocite and pyrite, with chlorine in acidic by:   The leaching mechanisms of chalcopyrite, sphalerite, and chalcocite with hypochlorous acid have been resolved by analyzing the concentrations of the products of the leaching reactions and also by determining the effects of pH on the leaching rate.

Chalcopyrite and sphalerite give rise to sulfur and sulfate as the primary products and the leaching rates are pH by: 2.

All copper sulfides require the presence of Fe 3+ and O 2 as oxidizing agents for leaching to occur. The copper sulfide is oxidized by Fe 3+.The resulting Fe 2+ is reoxidized to Fe 3+ by O Fe(II)/Fe(III) redox couple acts in a catalytic manner in these reactions (shown for elevated-temperature reaction conditions where the sulfur-containing product is sulfate, rather than the elemental.

For this reason a study was undertaken of the reaction of synthetic FeS with aqueous C Chlorine leaching of the pure pyrite mineral (FeS2) has been studied by a *To whom all correspondence should be addressed. X/90/$ -- Elsevier Science Publishers B.V.

BAYRAK~EKEN ET AL. number of investigators [ 2,4 ], but it is. Copper is most commonly present in the earth’s crust as copper-iron-sulphide and copper sulphide minerals, for example, chalcopyrite (CuFeS2), bornite (Cu5FeS4) and chalcocite (Cu2S).

Simultaneous Sulfur Dioxide Absorption and Hydrogen Sulfide Generation in an Aqueous Solution of Sodium Sulfide. Environmental Science & Technology30 (2), The Bureau of Mines conducted research on reactions of copper sulfide minerals with chlorine in an aqueous system.

Selected samples of covellite, chalcopyrite, chalcocite, bornite, and pyrite were. Minerals Engineering, Vol. 7, No. 1, pp.$+ Printed in Great Britain Pergamon Press Ltd TECHNICAL NOTE COMPARISON OF CHALCOCITE DISSOLUTION IN THE SULFATE, PERCHLORATE, NITRATE, CHLORIDE, AMMONIA, AND CYANIDE SYSTEMS W.W.

FISHER Department of Metallurgical and Materials Engineering, University of Texas. As is the case with coal, pyrite is commonly associated with other metal sulfide minerals (e.g., copper sulfides). Consequently, it is important to gain a basic understanding on the behaviour of pyrite during the chlorine leaching at the various conditions in order to make the relevant processes much more effective and economical.

Copper monosulfide is a chemical compound of copper and occurs in nature as the dark indigo blue mineral is a moderate conductor of electricity. A black colloidal precipitate of CuS is formed when hydrogen sulfide, H 2 S, is bubbled through solutions of Cu(II) salts.

It is one of a number of binary compounds of copper and sulfur (see copper sulfide for an overview of. Write a balanced chemical equation and use the necessary symbols from Table to describe the reaction completely: Bubbling chlorine gas through a solution of potassium iodide gives elemental iodine and a solution of potassium chloride A yellow precipitate formed with aqueous solutions of sodium sulfide and cadmium nitrate were mixed in.

A detailed reaction mechanism is proposed for the formation of crystalline elemental sulfur from aqueous sulfide by oxidation with transition-metal ions like VV, FeIII, CuII, etc.

The first step is the formation of HS• radicals by one-electron oxidation of HS- ions. These radicals exist at pH values near 7 mainly as S•.

Their spontaneous decay results in the formation of the disulfide ion. The nonferrous metal chlorides may then be water leached, separated, purified, and electrolyzed to recover copper and nickel metals and to regenerate chlorine for recycling.

AB - A chlorination process for treating metal sulfide flotation concentrates is described. Chlorine bleach is a solution of sodium hypochlorite and water.

Chlorine gas is produced when sulfuric acid is mixed with chlorine bleach. This reaction is a function of the change in pH of the solution from alkaline to acidic combined with the strong oxidant properties of. microwave system, as methods to improve or to help the leaching of different sulphide minerals.

For example, it is well known that ozone is a powerful oxidizing with high oxidation potential ( V) compared with hydrogen peroxide ( V) and chlorine ( V), making it advantageous to use in several applications. Importantly, ozone can create. The mechanisms of anodic reaction are deduced based on the reasonable hypothesis, and kinetic equations with respect to chlorine ions for each sulfide mineral are obtained.

Preparation and reactions. Cu 2 S can be prepared by heating copper strongly in sulfur vapour or H 2 S. The reaction of copper powder in molten sulfur rapidly produces Cu 2 S, whereas pellets of copper require much higher temperature.

Cu 2 S reacts with oxygen to form SO 2. 2 Cu 2 S + 3 O 2 → 2 Cu 2 O + 2 SO 2. In the production of copper two thirds of the molten copper sulfide is oxidised.

Aqueous solutions of sodium sulfide and copper(II) chloride are mixed together. Which statement is correct. Both NaCl and CuS precipitate from solution. No reaction will occur.

CuS will precipitate from solution. NaCl will precipitate from solution. Cu 2 S will precipitate from solution. Why would number 3 be correct and not number 1?. NCERT Exemplar Class 10 Science Chapter 1 Chemical Reactions And Equation. Short Answer Type Questions.

the balanced chemical equations for the following reactions and identify the type of reaction in each case. (a) Thermit reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.Structure. Anhydrous CuCl 2 adopts a distorted cadmium iodide structure.

In this motif, the copper centers are copper(II) compounds exhibit distortions from idealized octahedral geometry due to the Jahn-Teller effect, which in this case describes the localization of one d-electron into a molecular orbital that is strongly antibonding with respect to a pair of chloride ligands.In my article, lowering swimming pool pH, I discuss how pool water with a low pH can cause metal pool surfaces to corrode.

Low pH water is acidic, and the stronger the acid, the faster metal corrosion will take place. Concern: Low pH dissolves metal in pool equipment. It’s bad enough the the corrosion is happening, which looks unsightly, feels rough, and looks like you don’t maintain your.