Benzotriazole is applied as a leveler that promotes deposition of a smooth copper surface by inhibition of copper adatom diffusion and passivation of growing copper islands by effective adsorption of BTA molecules on the …
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Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI) Аутори: Ma, Bo ; Yao, Jun
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Copper oxide ore is characterized by low ore grade, fine embedded particle size and severe slime coating, which is a difficult ore to be processed in China [1].Malachite [Cu 2 (OH) 2 CO 3] is a classic type of copper oxide and can be widely applied in copper metal extraction [2].And it is a type of hydroxy copper carbonate, which is formed by oxidation and chemical …
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The pH of the pulp was 10-10.3 which may be beyond the upper limit for effective oxide copper flotation with alkyl hydroxamate. The sulfides were floated (for 10 rain.) in a rougher stage with 46 g/t of AERO208 Promoter (a dithiophosphate collector) followed by an oxide float (5 min.) with 80 g/t AERO6493 Promoter in the scavenger stage. ...
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Konieczny et al. (2013) showed that pre-flotation of carbonaceous matter from the copper ore is possible, however they used only one industrial frother. In this work, we investigate the influence of the type and dose of eleven different frothers on flotation of carbonaceous copper shale originated from the Kupferschiefer stratiform copper
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A method and product for concentrating metal values from their ores employing alkyl mercaptans as collector additives in froth flotation, wherein there is provided a mixture of (I) a collector selected from the class consisting of at least one of (A) an alkyl xanthogen alkyl formate compound having the general formula: ##STR1## wherein R is a branched or straight chain …
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In this study, we investigated the effects of the corrosion inhibitor benzotriazole (BTA), with the chemical formula C6H5N3, on the oxidation behavior of copper through microstructure …
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Influence of the alkyl chain on the protective effects of 1,2,3-benzotriazole towards copper corrosion. Part ii: formation and characterization of the protective films ... A copper layer was electroplated on the gold surface from 0.5 M CuSO 4 +0.5 M H 2 SO 4 solution with a 30 mA cm −2 current for 360 s ...
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Evrard and J. DeCyper, "Flotation of copper-cobalt ores with alkyl hydroxamates," in Proceedings of the 11th International Mineral Processing Congress, Cagliari, 1975. [48] D. Fuerstanau and H. Peterson.United States of America Patent 3438494, 1969. [49]
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5-Alkyl derivatives of 3-amino-1,2,4-triazole (5-alkyl-3-AT), when alkyls are undecyl-, nonyl- heptyl-, pentyl- and methyl-, are capable of forming passive layers on the copper surface at very low concentration in the range of several μM and effectively inhibit the local depasssivation by Cl − at higher concentration in neutral (pH 7.4 ...
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Copper oxide ores Copper sulphide ores Flotation collectors Mineral processing Alkyl hydroxamates abstract Sherwood Copper's Minto Mine processes a high grade copper–gold deposit in Yukon, Canada.
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Benzotriazole (BTAH) is one of the best corrosion inhibitors for Cu and its alloys. It is effective in preventing copper corrosion under stationary as well as dynamic conditions. Its …
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DOI: 10.1016/S0010-938X(98)00192-9 Corpus ID: 96313374; Influence of the alkyl chain on the protective effects of 1,2,3-benzotriazole towards copper corrosion. Part ii: formation and characterization of the protective films
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In this work the following techniques: weight loss measurements, potentiodynamic polarisation, SERS spectroscopy, electrochemical impedance spectroscopy and coulometry were …
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For example, self assembly and dynamics of alkyl ammonium surfactants on a montmorillonite surface (Heinz et al., 2007) and reactivity of an interacting hydroxyl radical on a hydroxylated crystalline silica surface (Konecny, 2001), are attempted to predict overall flotation response of clay mineral systems. ... a few experiments were carried ...
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Sodium alkyl dithiophosphate, mercaptobenzothiazole (FC7245) was found to be the secondary flotation reagent that gave the best copper recoveries. ... The present paper study of froth flotation of copper, from smelting slag, using not desalinated seawater as fresh water. The higher copper recovery obtained was 77.27%. download Download free PDF ...
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The significant volume of copper smelting slags poses environmental challenges, particularly concerning soil and surface water contamination. However, these slags contain valuable elements such as copper and iron, the recovery of which can contribute to both environmental protection and the circular economy in Chile. This study analyzes, at both …
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Co-catalytic effect of WS 2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI) Author links open overlay panel Bo Ma a, Jun Yao a, Tatjana Šolević Knudsen b, Zhihui Chen a, Wancheng Pang a, Bang Liu a, Ying Cao a, Xiaozhe Zhu a, Chenchen Zhao a
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IN COPPER ORE FLOTATION * Przemyslaw B. KOWALCZUK, Jan DRZYMALA Wroclaw University of Science and Technology, Faculty of Geoengineering, Mining and Geology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland, [email protected] Abstract: Froth flotation is widely used for upgrading of ores and other materials. Efficiency of
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25 TABLE III FLOTATION OF CHRYSOCOLLA BY NITROSO ALKYL RESORCINOLS (Feed 0.0456% copper, -120 mesh dry ground) 0.2 lb. /Tori C oilector' ' ' Fig. 4 T 0.1 k / T o n Collector Fig. 5 : 0.05 Lbl /Ton Collector Fig. : Gram s Percent E nrich to Copper : Grams Percent Enrich fo Copper : Gram s Percent E nrich to C o p p e r: : Froth Copper ...
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The CCC 95 indicates the frother concentration at which there is a 95% reduction in the mean bubble size in comparison to the mean bubble size in water only. 3 Results and discussion The flotation tests were performed to investigate the influence of the type and dosage of selected poly (ethylene glycol) alkyl ethers on the flotation performance ...
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Effects of grinding media and electrochemical conditions on selective flotation of copper and zinc were investigated using three different complex sulphide ore samples. ... 10.1080/01496395.2013.838966 Smithsonite Flotation from Zinc Oxide Ore using Alkyl Amine Acetate Collectors A. Mehdilo,1 M. Irannajad,1 and H. Zarei2 1 Department of Mining ...
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U.S. Pat. No. 4,022,686 provides a flotation process for copper sulfide and copper oxide ores and for copper smelter slags, wherein benzotriazole or alkyl benzotriazole is added to...
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Although basic porphyry copper flotation and metallurgy has remained virtually the same for many years, the processing equipment as well as design of the mills has continually been improved to increase production while …
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Result of the copper ore flotation response in different water types [145]. Schematic for the separate treatment of tailings (PFF: Pre-floated feed, PFT: Pre-float tails, CT: cleaning tails, ST ...
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EIS measurements show that thicker, less defective, more protective and persistent surface films of BTAH alkyl-derivatives can be built up on OFHC copper by increasing the side chain length (up to six CH 2 units) or the additive amount in the solution. At the same time, the process of film formation becomes more rapid.In the sulphate solution, the films are less defective and more …
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Request PDF | Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI) | In this ...
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Alkyl derivatives of benzotriazole (1-12 carbon atom long alkyl chain) were tested as inhibitors of pure iron corrosion in sulphuric or hydrochloric acid at 25°C and pure copper corrosion in acidic sulphate and saline solutions at 30°C. This series of compounds was more efficient in contrasting copper than iron corrosion and, generally, the longer the alkyl chain the …
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DOI: 10.1016/S0010-938X(01)00109-3 Corpus ID: 94921324; Studies on alkyl esters of carboxybenzotriazole as inhibitors for copper corrosion @article{Huynh2002StudiesOA, title={Studies on alkyl esters of carboxybenzotriazole as inhibitors for copper corrosion}, author={Ngoc Huynh and Steven E. Bottle and Takenori Notoya and Antony Trueman and …
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The inhibitive effect of coatings formed dipping copper in solutions of alkyl esters (methyl, butyl, hexyl and octyl) of carboxybenzotriazole was studied by potentiodynamic …
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The aim of this study was the recovery of copper from the oxide copper ore by froth flotation and agitating sulphuric acid (H2SO4) leaching. The ore with 4.21% copper grade used in this study was ...
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1,2,3-Benzotriazole (BTAH) and some of its 5-alkyl-derivatives (methyl-, butyl-, hexyl-, octyl-, dodecyl-) were tested by using different electrochemical techniques in order to investigate the ...
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It has been known since 1947 [5] that 1,2,3-benzotriazole (BTAH, C 6 H 5 N 3) is an effective corrosion inhibitor for copper and its alloys by preventing undesirable surface reactions.Since then BTAH has been included in a number of patents ([6], [7] and references therein).BTAH prevents discoloration of copper surfaces under atmospheric and immersed …
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