- Characterization of 5-nonylsalicylaldoxime production and the effects of modifiers on its extracting/stripping properties
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The 5-nonylsalicylaldoxime or 2-hydroxy-5-nonylbenzaldoxime namely aldoxime is a strong copper extractor that is mainly used in the process of copper solvent extractions. In order to characterize the aldoxime production process and to obtain a pure substance for using in the subsequent investigations, this reagent was synthesized and instrumental analysis such as FT-IR, 1H-NMR, and GC/MS spectra were first taken on the final product. The effects of various modifying reagents were studied on the synthesized aldoxime for improving its extracting and striping properties in the Cu (II) extraction processes. An optimum formulation of organic phase including the aldoxime and some modifier reagents was determined based on the variation of type and the concentration of the modifiers. The obtained experimental data show that the net copper transferring in a mixture of the aldoxime and modifier mainly the aliphatic alcohols (C12 (40 % w/w) and C14 (60 % w/w)) is greater than the aldoxime alone and greater than its other mixture. Springer Science+Business Media B.V. 2012.
- Pouramini, Zeinab,Moradi, Ali
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- A METHOD FOR THE PREPARATION OF ALKYLSALICYLALDEHYDE AND ALKYLSALICYLALDOXIME, AND USE THEREOF
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The invention relates to an improved method for the preparation of alkylsalicylaldehyde or its corresponding metallic salts. The invention also relates to a method for the preparation of alkylsalicylaldoxime by reacting said alkylsalicylaldehyde or its corresponding metallic salts with hydroxylamine or its salt. The invention also relates to a method for extracting a metal in an aqueous solution containing dissolved metal.
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Page/Page column 16-17
(2017/02/09)
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- METHOD FOR PREPARATION OF 5-ALKYLSALICYLALDOXIMES AND APPLICATION THEREOF
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Method for preparation of 5-alkylsalicylaldoximes with formula 1, where R is a C6-C16 alkyl group, consisting in that into a water-alcohol solvent system, p-alkylphenol, sodium hydroxide, chloroform and hydroxylamine are introduced, while in relation to the alkylphenol used, sodium hydroxide and chloroform are used in amounts from the stoichiometric amount to a 100% excess, and hydroxylamine is used in amounts from the stoichiometric amount to a 60% excess, and the reaction is carried out at a temperature of 60-75° C. for 1.5-4 h, and then, at a temperature of 20-30° C., the post-reaction mixture is acidified till the pH of the aqueous phase a neutral C5-C10 hydrocarbon solvent, the layers are separated, and the solvent is distilled off from the organic phase.
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Paragraph 0019-0023
(2018/01/18)
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- Comparing of 5-nonylsalicylaldoxime and salicylaldehyde characterization using magnesium salt formylation process
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5-Nonylsalicylaldoxime and salicylaldehyde are two derivatives of phenolic compounds which are very applicable materials in industries. Formerly the formylation of phenolic derivatives were carried out by Rimer-Tiemann method. In this work both of these two materials were synthesized by magnesium meditated formylation technique and their structural characterizations were compared by instrumental analysis technique. In order to achieve a selectively orthoformylated product, the hydroxyl group of nonylphenol (or phenol) was first modified by magnesium methoxide. The nonylphenol magnesium salt was then formylated by paraformaldehyde. The oximation reaction was finally applied to the prepared non-ylsalicylaldehyde magnesium salt by liquid extracting via water and acid washing and other extractions. The solvent was finally removed by evaporation under reduced pressure. Some instrumental analysis such as 1H-NMR, GC/MS and FT-IR spectra were taken on the product in order to interpret the reaction characterization quantitatively and qualitatively. The formaldehyde and oxime functional groups of two compounds were investigated through 1H-NMR and FT-IR spectra and were compared. The yield of methoxilation was very good and the yields of formylation and oximation reactions were about 90%and 85% respectively. The orthoselectivity of formylation reaction were evaluated by comparing of the relevant spectra. The GC/MS spectra also confirmed the obtained results.
- Pouramini, Zeinab,Moradi, Ali
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experimental part
p. 357 - 362
(2012/09/08)
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- A NOVEL PROCESS FOR THE MANUFACTURE OF 5-NONYL SALICYLALDOXIME
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The invention relates to a process for producing 5-nonyl salicylaldoxime that comprises of converting nonyl phenol to a 5-nonyl aldehyde in a two-step reaction using a novel catalyst mixture, followed by the oximation of the said aldehyde using hydroxylamine sulphate, and that the said catalytic process of aldehyde production is the main invention, in that the effective use of the catalyst mixture helps the reaction proceed at a faster and controlled rate which leads to a higher yield of aldehyde, as a result of complete conversion of all the reactants to the final products.
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Page/Page column 7-9
(2010/11/26)
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- Reaction of nitromethane with aluminium phenolates: Mild synthesis of salicylaldoximes
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A mild synthesis of phenolic oximes has been performed by heating AlCl3 in nitromethane with suitable phenols (molar ratio 2:1).
- Sartori, Giovanni,Bigi, Franca,Maggi, Raimondo,Tomasini, Fabio
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p. 2393 - 2396
(2007/10/02)
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