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aldoximes and ketoximes for extracting copper

aldoximes and ketoximes for extracting copper

US6342635B1 - Ketoximes, processes therefor, and copper ...

Ketoximes, processes for their preparation, compositions containing them, and a copper extraction process using the compositions. One process for the preparation of the ketoximes comprises the following steps: A) reacting a phenol with a monocarboxylic acid, monocarboxylic acid halide, or monocarboxylic acid anhydride in an inert organic solvent in the presence of an

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Copper Solvent Extraction - BASF

BASF produces a complete line of copper solvent extraction reagents, including ketox- imes, aldoximes, non-modified blends and modified blends of ketoximes and aldox- imes. These reagents and reagent blends allow BASF to supply its customers with an optimized reagent formulation tailored to meet the needs of their specific applications.

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Copper Solvent Extraction

BASF produces a complete line of copper solvent extraction reagents, including ketoximes, aldoximes, non-modified blends and modified blends of ketoximes and aldoximes. These re- agents and reagent blends allow BASF to supply its customers with an optimized reagent formulation tailored to meet the needs of their specific applications.

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Copper extraction in nitrate media - ScienceDirect

Jan 01, 1990 · However, there is a trend for better selectivity with a lower ion exchanger content in the organic phase and a preference for aldoximes over ketoximes. Palladium was extracted in all conditions in parallel with copper. However, under copper stripping conditions it remains in the organic phase.

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(PDF) Customising copper:iron selectivity in modified ...

Ketoximes show less ... while retaining the other benefits offered by ester-modified aldoximes. The results of an integrated solvent extraction-electrowinning pilot-plant trial are presented, in ...

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EPO - T 0205/13 (Copper extractant/CYTEC) of 1.12.2015

Jan 12, 2015 · In the copper extraction process of document D3 (see D3, column 6, lines 2 to 6), specific aldoximes and ketoximes, namely 5-nonylsalicylaldoxime and 5-nonyl-2-hydroxyacetophenone oxime, are disclosed as constituents of the preferred extractant composition which fall under the generic formula of claim 1 of the first auxiliary request.

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Distribution of Copper Ions between an Aqueous Phase and a ...

Usually, copper (II) was more easily extracted by aldoximes than by ketoximes, but the systems exhibited unfavourable physical properties, including poor kinetics and formation of emulsions and precipitates, which rendered thorough investigation difficult.

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Inhibition of copper amine oxidases by pyridine-derived ...

Nov 01, 2001 · Several aliphatic or aromatic aldoximes and ketoximes (without pyridine moiety) were tested as inhibitors of PSAO to evaluate the anticipated influence of the heterocyclic nitrogen atom in pyridine-derived aldoximes and ketoximes on the inhibition potency ().The tested compounds had to be pre-incubated with the enzyme for 5–15 min to achieve full inhibition. 4

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SOLVENT EXTRACTION/ ION EXCHANGE FOR METAL

The solvents basically ketoximes, aldoximes and mixture of these are mostly employed for the extraction of copper. Ketoxime reagents are moderately strong copper extractant and they act best when the pH of leach solution is relatively high (>1.8). Modified aldoximes extract copper even at low pH or when copper content is high.

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Copper extraction in nitrate media - ScienceDirect

The factors that influence the extraction of copper in nitrate media are studied. The effects of the composition of the organic phase (different ketoximes, aldoximes, modifiers at varying concentrations) on the copper loading ability and transfer capacity are shown.

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New generation of highly selective and degradation ...

Jul 05, 2018 · BASF has a wide offering of copper solvent extraction (SX) reagents, including aldoximes, ketoxime and aldoxime/ketoxime blends Modified aldoximes, ketoxime and aldoxime/ketoxime blends are well know and have been extensively studied. BASF has recently developed a very selective and degradation resistant aldoxime and ketoxime.

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Solvent extraction of copper from sulphate medium using ...

These products consist of phenolic ketoximes or aldoximes or mixtures of these oxime compounds [9], which can coordinate well to copper(II) cations in solution and, therefore, are responsible for ...

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SOLVENT EXTRACTION/ ION EXCHANGE FOR METAL

8-hydroxyquinoline), aldoximes, SME 529, Acorga P1 were also used for Cu-SX. The solvents basically ketoximes, aldoximes and mixture of these are mostly employed for the extraction of copper. Ketoxime reagents are moderately strong copper extractant and they act best when the pH of leach solution is relatively high (>1.8).

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LixTRA™ – Novel Copper Leach Technology

In hydrometallurgy BASF supply copper SX reagents marketed under the LIX® tradename, which encompasses ketoximes, aldoximes and formulated blends thereof. This broad range of reagents and formulations allows BASF to supply its customers with optimized solutions tailored to meet the needs of their spe-cific process.

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V). SEPARATION PROCESSES-SOLVENT EXTRACTION/ ION

basically ketoximes, aldoximes and mixture of these are mostly employed for the extraction of copper. Ketoxime reagents are moderately strong copper extractant and they act best when the pH of leach solution is relatively high (>1.8). Modified aldoximes extract copper even at low pH or when copper content is high.

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JME

63) and aldoximes (LIX 622 and Acorga M5640) and b) acidic and solvating extractants such as Cyanex 272, Cyanex 302, Cyanex 301; Cyanex 921 and Cyanex 923, and E2EHPA; 2) The chelating type extractants (ketoximes and aldoximes) have proved to be the most effective for the extraction of copper, and to be the most

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US7025899B2 - Concentrated solutions of oxime metal ...

The preparation of concentrated solutions of oxime metal extractants, such as aldoximes and ketoximes, or mixtures of aldoxime and ketoxime, and the use thereof in formulating or preparing extraction reagent compositions for use in an extractant organic phase in a process of extracting metals from aqueous solutions containing metal values; and in particular, to concentrates

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Synthesis of oxime from a renewable resource for metal ...

mineral industry, especially for copper extraction. These products consist of phenolic ketoximes or aldoximes or mixtures of these oxime compounds [9], which can coordinate well to copper(II) cations in solution and, therefore, are responsible for the extraction activity. These phenolic oximes products have also been employed

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Oxime ketoxime - Big Chemical Encyclopedia

The reaction is usually applied to ketoximes aldoximes often are less reactive. Another arylation reaction which uses arenediazonium salts as reagents and is catalyzed by copper should be discussed in this section on Meerwein reactions. It is the Beech reaction (Scheme 10-49) in which ketoximes such as formaldoxime (10.13, R=H), acetaldoxime ...

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Cognis Corporation - Mining Technology | Mining News and ...

COGNIS, supplier of LIX®Reagents and inventor of copper solvent extraction (SX), has been the recognized market and technology leader for more than 45 years. Independent studies show LIX® Reagents are 10 – 25% more efficient than the competitive products and are used to produce over 60% of the world’s SX copper cathode.

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Methods Of Metal Extraction Using Oximes - VIRNIG MICHAEL

Provided are methods using ketoximes and/or aldoximes, including 3-methyl-5-alkylsalicylaldoxime and/or 3-methyl-5-alkyl-2-hydroxyacetophenone oxime, in reagent compositions for metal extraction/isolation. One such method is of extracting a metal from a nitrate-containing aqueous solution.

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Liquid–liquid synthesis of oximes from carbonyl compounds ...

3 In order to elucidate kinetics in the synthesis of oxime liquid-liquid extraction reagents, used as 4 ligands in hydrometallurgical copper production, the oximation reactions of salicylaldehyde and 5 2’-hydroxyacetophenone with hydroxylamine were studied in two phase system. Two 6 experimental methods were applied: CSTR reactor under ...

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Deoximation of Oximes, Sodium Oximates, and O ...

Sep 23, 2006 · Oximes, O-benzoyloximes and sodium salt of aldoximes and ketoximes were deoximated to their parent carbonyl compounds with copper (II) chloride dihydrate in acetonitrile as well as water. This method works well with both aldoximes and ketoximes without any risk of overoxidation in the former case.

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Liquid-liquid extraction and separation of copper(II) and ...

ketoximes and aldoximes, have gained commercial acceptance as reagents for solvent extraction from acidic leach solutions. Oxime mixtures have been shown to be advantageous over the individual group ketoximes and ... copper

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New generation of highly selective and degradation ...

Jul 05, 2018 · BASF has a wide offering of copper solvent extraction (SX) reagents, including aldoximes, ketoxime and aldoxime/ketoxime blends Modified aldoximes, ketoxime and aldoxime/ketoxime blends are well know and have been extensively studied. BASF has recently developed a very selective and degradation resistant aldoxime and ketoxime.

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An Investigation into the Extraction Behavior of Copper ...

Jul 31, 2020 · These studies showed that in general, there were two main classes of solvents for the extraction of copper: (1) the chelating extractants which are divided into two different groups of ketoximes and aldoximes such as LIX84-I, LIX 63, LIX 984N, CP-150, and Acorga M5640; and (2) acidic and solvating extractants such as Cyanex 302, Cyanex 921, and ...

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Compositions and methods of using a ketoxime in a metal ...

Mar 24, 2015 · One method of copper extraction is a process of leaching, coupled together with solvent extraction, and finally copper production by electrowinning. Leaching is typically carried out by stacking the ore in piles on a prepared pad or by stacking it in a small canyon. ... 3-methyl aldoximes, 3-methyl ketoximes and their blends transfer much lower ...

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The synthesis of oxime reagents from natural and semi ...

May 10, 2005 · The solvent extraction properties for copper(II) of the synthesised aldoximes have been compared with those of a current commercial reagent, 2-hydroxy-5-t-nonylbenzaldoxime (Acorga 5100, Cytec), and two former extractants, 2-hydroxy-5-t-nonylacetophenone ketoxime (SME 529, Shell) and 2-hydroxy-5-t-nonylbenzophenone

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Oxime - Wikipedia

An oxime is a chemical compound belonging to the imines, with the general formula RR'C=N O H, where R is an organic side-chain and R' may be hydrogen, forming an aldoxime, or another organic group, forming a ketoxime.O-substituted oximes form a closely related family of compounds. Amidoximes are oximes of amides with general structure R 1 C(=NOH)NR 2 R 3..

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Cognis Corporation - Mining Technology | Mining News and ...

COGNIS, supplier of LIX®Reagents and inventor of copper solvent extraction (SX), has been the recognized market and technology leader for more than 45 years. Independent studies show LIX® Reagents are 10 – 25% more efficient than the competitive products and are used to produce over 60% of the world’s SX copper cathode.

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Liquid–liquid synthesis of oximes from carbonyl compounds ...

3 In order to elucidate kinetics in the synthesis of oxime liquid-liquid extraction reagents, used as 4 ligands in hydrometallurgical copper production, the oximation reactions of salicylaldehyde and 5 2’-hydroxyacetophenone with hydroxylamine were studied in two phase system. Two 6 experimental methods were applied: CSTR reactor under ...

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Heterogeneous Route for the One-Pot Synthesis of N ...

Dec 01, 2017 · A rapid and facile conversion of primary amides and aldoximes to nitriles and ketoximes to amides with triphenylphosphine and N-chlorosuccinimide. Synth. Commun. 2002, 32, 2535–2541. 10.1081/scc-120005936. [Google Scholar]

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Beyond a solvent: triple roles of dimethylformamide in ...

Abstract. N, N-Dimethylformamide (DMF) is frequently used as an aprotic solvent in chemical transformations in laboratories of academia as well as in those of chemical industry.In the present review, we will reveal that DMF is actually something much more than a solvent. It is a unique chemical since, as well as being an effective polar aprotic solvent, it can play three other

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CUSTOMIZING COPPER-IRON SELECTIVITY USING MODIFIED ...

Jul 18, 2013 · In most copper solvent-extraction operations, an important consideration in the choice of extractant is the requirement for high selectivity of copper over iron. Ester-modified aldoxime extractants presently offer the best Cu:Fe selectivity.

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Beckmann Rearrangement | Thermo Fisher Scientific - ZA

Beckmann Rearrangement. Named after the German chemist Ernst Otto Beckmann, the Beckmann rearrangement involves the conversion of aldoximes and ketoximes to their corresponding amides under acidic conditions. The reaction is usually carried out under under termperatures greater than 130°C, and in the presence of a large excess of strong ...

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Characterization of 5-nonylsalicylaldoxime production and ...

Apr 29, 2012 · Aromatic hydroxyoximes, which are mainly used as the extracting reagents of copper (II), are divided into two classes of the 2-hydroxy nonyl aceto phenoxime (briefly ketoximes) and the 2-hydroxy-5-nonylbenzaldoxime (briefly salicylaldoximes) [1–3].The salicylaldoximes, which are much stronger extractants than the ketoximes, have considerable

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Solvent Extraction Transfer of Cu from Leach Solution to ...

Stripping of Cu from the organic extractant is favored by the high acid concentration of the electrolyte. The organic extractants used in the copper industry are aldoximes and ketoximes, which are mixed to give optimum extraction, strip, and phase separation properties. The problems, chemistry, and circuit design of this method are also discussed.

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