Corrosion in alkali hydroxide solutions of electrolytic zinc powder containing codeposited lead

1976 ◽  
Vol 6 (2) ◽  
pp. 163-169
Author(s):  
R. V. Moshtev ◽  
R. Stoicheva
Keyword(s):  
Zinc Powder ◽  
Electrolytic Zinc ◽  
Alkali Hydroxide

Production of electrolytic zinc powder from zinc anode casing of spent dry cell batteries

2015 ◽  
Vol 157 ◽  
pp. 60-71 ◽  
Author(s):  
Ashour Owais ◽  
Mohamed Abdel Hady Gepreel ◽  
Essam Ahmed
Keyword(s):  
Zinc Powder ◽  
Zinc Anode ◽  
Electrolytic Zinc ◽  
Dry Cell

Use of Electrolytic Zinc Powder for Cementation of Gold from Cyanide Solutions

Metallurgist ◽  
2018 ◽  
Vol 62 (5-6) ◽  
pp. 456-463 ◽  
Author(s):  
S. A. Yakornov ◽  
K. D. Naumov ◽  
V. G. Lobanov ◽  
P. A. Kozlov ◽  
Ya. D. Zelyakh ◽  
...  
Keyword(s):  
Zinc Powder ◽  
Electrolytic Zinc ◽  
Cyanide Solutions

High-Power Alkaline Zn-MnO2 Batteries Using γ-MnO2 Nanowires/Nanotubes and Electrolytic Zinc Powder

2005 ◽  
Vol 17 (22) ◽  
pp. 2753-2756 ◽  
Author(s):  
F. Y. Cheng ◽  
J. Chen ◽  
X. L. Gou ◽  
P. W. Shen
Keyword(s):  
High Power ◽  
Zinc Powder ◽  
Electrolytic Zinc ◽  
Mno2 Nanowires

Characteristics of electrolytic zinc powder produced from zinc dross

1979 ◽  
Vol 24 (2) ◽  
pp. 245-250 ◽  
Author(s):  
I.F. Hewaidy ◽  
H.O. Sabra ◽  
E.H. Nassif
Keyword(s):  
Zinc Powder ◽  
Electrolytic Zinc ◽  
Zinc Dross

scholarly journals Features of gold cementation in percolation mode by electrolytic zinc powders

2020 ◽  
pp. 19-26
Author(s):  
K. D. Naumov ◽  
V. G. Lobanov
Keyword(s):  
Particle Size ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Fine Powder ◽  
Zinc Powder ◽  
Gold Deposition ◽  
Electrolytic Zinc ◽  
Zinc Powders ◽  
Cyanide Solutions

The study covers physicochemical features of dendritic zinc powders and their effect on gold cementation from cyanide solutions. Three zinc powders were obtained in a laboratory environment by electroextraction at different conditions, and these powders featured various particle size and specific surface area. The properties of zinc powders obtained and powder currently used for gold cementation were evaluated using SEM (Jeol JSM-6390LA), BET (Gemini VII 2390) and laser diffraction (Sympatec HELOS & RODOS) methods. It is shown that electrolytic powders have high specific surface area (1.3–2.6 times more) and a low bulk density (3.1–3.8 times less), relative to zinc powder currently used for gold cementation. It was found that due to specific physical properties electrolytic powders have low hydraulic resistance, which eliminates the need for inert additives introduced during cementation, increases unit capacity and reduces the load on equipment. Inert additives elimination will additionally increase the gold content in the resulting product. The dendritic morfology of zinc powders obtained compensates high particle size resulting in the high efficiency of gold precipitation. At the long cementation cycle the effective gold deposition area (with gold extraction of more than 97 %) turned out to be shorter for electrolytic powder compared to fine powder currently used. However, in practice, the cementation cycle is always limited by fine powder throughput and it is not possible to achieve the full zinc potential. The resulting cementation product usually contains 25–35 % of unused zinc. These studies show the effectiveness of using electrolytic zinc powder for gold cementation from cyanide solutions.

scholarly journals Sensing Performance of Al and Sn Doped ZnO for Hydrogen Detection

Proceedings ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 39
Author(s):  
Zahira. El khalidi ◽  
Maryam Siadat ◽  
Elisabetta. Comini ◽  
Salah. Fadili ◽  
Philippe. Thevenin
Keyword(s):  
Zinc Oxide ◽  
Chemical Sensor ◽  
Low Cost ◽  
Zinc Powder ◽  
Health Condition ◽  
Vibration Modes ◽  
X Ray Diffraction ◽  
Grain Sizes ◽  
Pure Oxide ◽  
Doped Zno

Chemical gas sensors were studied long ago and nowadays, for the advantageous role they provide to the environment, health condition monitoring and protection. The recent studies focus on the semiconductors sensing abilities, especially of non toxic and low cost compounds. The present work describes the steps to elaborate and perform a chemical sensor using intrinsic and doped semiconductor zinc oxide. First, we synthesized pure oxide using zinc powder, then, two other samples were established where we introduced the same doping percentage of Al and Sn respectively. Using low cost spray pyrolysis, and respecting the same conditions of preparation. The obtained samples were then characterized by X Ray Diffraction (XRD) that revealed the hexagonal wurzite structure and higher crystallite density towards the direction (002), besides the appearance of the vibration modes related to zinc oxide, confirmed by Raman spectroscopy. SEM spectroscopy showed that the surface morphology is ideal for oxidizing/reduction reactions, due to the porous structure and the low grain sizes, especially observed for the sample Sn doped ZnO. The gas testing confirms these predictions showing that the highest response is related to Sn doped ZnO compared to ZnO and followed by Al doped ZnO. The films exhibited responses towards: CO, acetone, methanol, H2, ammonia and NO2. The concentrations were varied from 10 to 500 ppm and the working temperatures from 250 to 500°C, the optimal working temperatures were 350 and 400 °C. Sn doped ZnO showed a high response towards H2 gas target, with a sensitivity reaching 200 at 500 ppm, for 400 °C.

ChemInform Abstract: Frequency Effect of Ultrasound on Debromination of Stilbenedibromides with Zinc Powder.

ChemInform ◽  
2010 ◽  
Vol 29 (47) ◽  
pp. no-no
Author(s):  
M. ATOBE ◽  
Y. KADO ◽  
T. NONAKA
Keyword(s):  
Zinc Powder ◽  
Frequency Effect

Zinc Powder as an Effective Reducing Reagent during Liquid-Phase Oxidation of Benzene to Phenol Using Molecular Oxygen over V-Substituted Heteropoly Acid Catalysts

2006 ◽  
Vol 45 (22) ◽  
pp. 7444-7450 ◽  
Author(s):  
Shingo Sumimoto ◽  
Chiaki Tanaka ◽  
Sho-ta Yamaguchi ◽  
Yuichi Ichihashi ◽  
Satoru Nishiyama ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Molecular Oxygen ◽  
Heteropoly Acid ◽  
Zinc Powder ◽  
Liquid Phase Oxidation ◽  
Acid Catalysts ◽  
Phase Oxidation ◽  
Oxidation Of Benzene
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