NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their …
5-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 …
A three-factor, three-level, face centered cubic (FCC) experimental design was used to study the effect of important chemical variables—collector chain length, collector concentration and frother type—on the collector properties of the recently developed N -allyl- O-alkyl thionocarbamates (ATC) in copper flotation from a porphyry …
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
Benzotriazole is effective for most copper-base materials and affords protection in aqueous and gaseous environments polluted with sulphur dioxide, hydrogen sulphide and salt mist. Benzotriazole can be applied as an aqueous solution or be incorporated into lacquers and polishes.
Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr (VI)
A critical analysis of the available information and data, based on several case studies, flotation testing, and microscopic analysis indicates that alkyl hydroxamates can effectively recover well-defined oxide minerals of copper, but not copper occurrences such as Cu-bearing goethite (often misidentified as cuprite) which report as Acid Soluble …
Flotation of smithsonite from tailing coming from a cerussite flotation circuit was investigated using Armac C and Armac T as alkyl amine acetate collectors. The results showed that the dosage of N...
In this work, we designed and synthesized a series of A-DA'D-A type SMAs by introducing different N -substituted alkyl and ester alkyl side chains on benzotriazole (BZ) central unit and aimed to investigate the effect of different ester substitution positions on photovoltaic performances.
Benzotriazoles with an alkyl group, especially n -butyl, at the benzene ring have been used to inhibit corrosion of copper in aqueous systems 〈88EUP258021〉.
Download Citation | Synthesis of New Benzotriazole Derivatives Containing Carbon Chains as the Corrosion Inhibitors for Copper in Sodium Chloride Solution | In this study, a series of ...
In this paper, a novel surfactant, N -butoxypropyl- S - [2- (hydroxyimino) propyl] dithiocarbamate ester (BOPHPDT) was first synthesized and introduced as a flotation collector for copper minerals. The micro and bench-scale flotation results demonstrated BOPHPDT exhibited superior flotation performance for chalcopyrite in …
Copper oxide minerals are important copper resources, which include malachite, azurite, chrysocolla, cuprite, etc. Flotation is the most widely used method for the enrichment of copper oxide minerals in the mineral processing industry. In this paper, the surface properties of copper oxide minerals and their effects on the mineral flotation ...
Request PDF | Benzotriazole as a structural component in chelating and bridging heterocyclic ligands; ruthenium, palladium, copper and silver complexes | The coordination chemistry of five N,N ...
The analysis may shed more light on the mechanism of the process.28,29It has been employed to study copper electrodeposition with or without additives.18,21,22. One common additive, benzotriazole (BTA), is known to be an excellent corrosion inhibitor for copper surfaces.30,31Interest in this.
Potassium amyl xanthate (PAX) and sodium isobutyl xanthate (SIBX) are traditional thiol collectors used in the bulk and selective froth flotation of nickel and copper sulfide mineral ores. Individually, they are not selective enough for economical low-grade nickel froth flotation. Therefore, more selective collectors or co-collectors are required.
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 deposit mined by KGHM Polska Miedz S.A.
5-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 …
As a novel collector, O-isopropyl-N,N-diethyl thionocarbamate (IPDTC) was designed and synthesized for copper−sulfur flotation separation. Density functional theory calculations were performed to investigate the electronic structures of IPDTC. The results showed that IPDTC had higher energy of the highest occupied molecular orbital but …
The cumulative copper recoveries increased markedly to over 90%, which represents a significant improvement in comparison to the recoveries obtained from the mill-float process. Sodium alkyl dithiophosphate, mercaptobenzothiazole (FC7245) was found to be the secondary flotation reagent that gave the best copper recoveries.
Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate acti‐vation for the simultaneous elimination of typical flotation reagent benzotria‐zole and Cr(VI)
Semantic Scholar extracted view of "Discrete Benzotriazole‐Copper(II) Complexes in Chelated and Non‐Chelated Coordination Modes: Structural Analysis and Catalytic Application in Click and A 3 Coupling Reactions" by Sharmila Pandey et al.
The effect of seven hydroxamate collectors on malachite flotation was investigated. Separation of malachite from quartz in a synthetic ore was obtained. All seven collectors investigated selectively adsorb onto the surface of malachite. Benzo- and two C 8 alkyl hydroxamates resulted in the best flotation response.
The formation of inhibitive benzotriazole films on copper and copper alloyed with silver has been studied with scanning electrochemical microscopy (SECM) and X-ray photoelectron spectroscopy (XPS).
Surface chemistry and flotation of cassiterite in the presence of alkyl hydroxamic acid/salt surfactant has been investigated. Results of the adsorption isotherms, electrokinetic and infrared spectroscopy indicate that octyl hydroxamate adsorbs on cassiterite by both physical and specific forces.
Abstract Corrosion inhibition of the self-assembled monolayer (SAM) of 1,2,3-Benzotriazole (BTAH) on and sulfide-covered (tarnished) copper surfaces was studied using impedance, scanning electron microscopy, and Raman spectroscopy. SAM on preexisting sulfide film develops a more improved protection than on the …
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 [J]
This paper focuses on the anticorrosive behaviour of surface films formed by different benzotriazole alkyl derivatives on a Cu6Sn bronze (B6), whose c…
May 10 1977 a flotation process in which copper ores or copper converter slags are ground and firstly have added thereto benzotriazole or alkyl benzotriazole as an activator and secondly one or more collectors selected from the group2-Recovery of Copper and Cobalt from Converter Slag with a,,Key words: Converter slag, flotation, …
Abstract The corrosion behavior of copper with various organic inhibitors in aerated solutions at pH 1 to pH 2 was studied using a potentiostat. The inhibitors studied included benzotriazole (BTAH), hydroxy benzophenoximes, L-hydroxy-5-nonylacetonphenone oxime, and sodium octyl hydroxamate (SOH). BTAH was shown to …
Selection of a proper frother in flotation depends on the material used, necessary dose of frother and its selectivity. The selectivity of flotation can be characterized by proper separation factors and indices. In this paper separation selectivity and power of frothers were evaluated basing on separation data for a given material and frother ...
A leading supplier of Benzotriazole and Sodium Benzotrizole, Wincom Inc. provides Wintrol B for copper corrosion resistance for industrial and water treatment applications.
The determined physicochemical models in the form of quantitative equations have been derived for the optimal conditions of flotation and depression of copper minerals under changing pH value and ...
The use of a factorial experimental design to study collector properties of N-allyl- O-alkyl thionocarbamate collector in the flotation of a copper ore
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 ...
The inhibition of copper corrosion in aerated 0.1 mol l−1 hydrochloric acid solutions was studied using electrochemical polarization in the presence of different concentrations of benzotriazole and its two derivatives, 5-chloro and 5-methyl benzotriazole. The inhibition efficiencies obtained from cathodic Tafel plots increased …
Copper (I)-chiral phosphoramidite complex catalysts for the asymmetric coupling of carbenoids with terminal alkynes. In 2018, Xiaohua Liu and co-workers developed a one-pot three-component reaction of terminal alkynes with α -diazoesters and isatins for the synthesis of enantioenriched tetrasubstituted allenes 109.
Benzo-condensed azole containing three heteroatoms, such as bezoxadiazole, benzothiazole and benzotriazole [3], [4], have been extensively studied for their broad range of biological activity. However, few reviews were focalized on a single nucleus. Indeed, the aim of this paper is to provide an overview of the benzotriazole …
In recent years, there have been few studies on the flotation of thiourethane in porphyry copper ore. In this study, the effect of O-isobutyl-N-ethyl thionocarbamates (IBET) on the flotation behavior of porphyry copper ore was investigated. The ability of IBET to collect copper-bearing minerals in porphyry copper ores and its adsorption …
Semantic Scholar extracted view of "Theoretical and electrochemical analysis on inhibition effects of benzotriazole derivatives (un- and methyl) on copper surface" by Da Yin et al.
