PDF Publication Title:
Text from PDF Page: 038
an iodine-iodide solution. The results indicated that more than 99% of gold was dissolved, while less than 1% of silver and palladium were dissolved at the conditions: iodine/iodide mass ratio of 1/6, pulp density of 10%, agitation speed of 500 rpm, 24 hours and 40°C. Moreover, approximately 99.8% of gold could be recovered by NaOH precipitation with a 0.6 ml/ml dosage of L-AA at pH 1.9. 3.4 Bromine Leaching Bromine with atomic number 35 is used in the production of clear brines for the oil drilling industry, bromine-based biocides for water treatment, and brominated flammable retardants (Lyday, 2002). Bromine is a reactive element and mostly found in the form of inorganic salts in seawater, evaporitic lakes, and underground brines (Schnebele, 2018). Bromine, a volatile reddish- brown, highly corrosive liquid, can be produced by chlorine oxidation of bromide, followed by absorption and purification. Bromine is the key element in the production of brominated flammable retardants, which are the detrimental compound for printed circuit boards; thus, it will be beneficial to investigate the bromine chemistry in the extraction of precious metals. 3.4.1 Bromine Chemistry Liquid bromine is denser than water and soluble in water (solubility: 0.214 mol/L at 25 °C) (PubChem, 2018). For a stable bromine-water system, Fig. 3.2 shows the stable bromide species at room temperature (25 °C). The bromine is present as aqueous species in the red region, in which the reaction (Eq. 3.8) occurs. Br2(aq) = Br2(l) (3.8) The formation of tribromide ions shown in the yellow region could be expressed either by Eq. 3.9 or Eq. 3.10. Br3- + 2e = 3Br- (3.9) Br2 + Br- = Br3- (3.10) Other than Br2 and Br3-, BrO3- , BrO4- and Br- can also be found in the diagram. As shown in Fig. 3.3 and 3.4, at Eh = 0.8 V, the Br- species predominates in the pH range of 0 to 11; however, Br-, Br2 and Br3- become the dominant species when the Eh in the solution is up to 1 V. The increasing concentrations of Br2 and Br3- will further have a positive effect on oxidizing the 25PDF Image | HYDROMETALLURGICAL TREATMENT OF E-SCRAP
PDF Search Title:
HYDROMETALLURGICAL TREATMENT OF E-SCRAPOriginal File Name Searched:
Cui_mines_0052E_11489.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)