- Parallel microwave-assisted synthesis of ionic liquids and screening for denitrogenation of straight-run diesel feed by liquid-liquid extraction
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Fifty-six ionic liquids were efficiently synthesized in parallel format under one-pot, solvent-free microwaveassisted synthesis. These compounds were evaluated as extracting agents of nitrogen-containing compounds from a real Diesel feed before being submitted to the hydrodesulfurization process to obtain ultralow sulfur Diesel. Our results showed that halogenated ionic liquids are an excellent alternative due to these ionic liquids are relatively inexpensive, presenting a high selectivity for the extraction of nitrogen-containing compounds and can be regenerated and recycled.
- Ceron, Miguel A.,Guzman-Lucero, Diego J.,Palomeque, Jorge F.,Martinez-Palou, Rafael
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experimental part
p. 427 - 432
(2012/07/01)
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- A simple halide-to-anion exchange method for heteroaromatic salts and ionic liquids
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A broad and simple method permitted halide ions in quaternary heteroaromatic and ammonium salts to be exchanged for a variety of anions using an anion exchange resin (A- form) in non-aqueous media. The anion loading of the AER (OH- form) was examined using two different anion sources, acids or ammonium salts, and changing the polarity of the solvents. The AER (A- form) method in organic solvents was then applied to several quaternary heteroaromatic salts and ILs, and the anion exchange proceeded in excellent to quantitative yields, concomitantly removing halide impurities. Relying on the hydrophobicity of the targeted ion pair for the counteranion swap, organic solvents with variable polarity were used, such as CH3OH, CH3CN and the dipolar nonhydroxylic solvent mixture CH3CN:CH2Cl 2 (3:7) and the anion exchange was equally successful with both lipophilic cations and anions.
- Alcalde, Ermitas,Dinares, Immaculada,Ibanez, Anna,Mesquida, Neus
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experimental part
p. 4007 - 4027
(2012/07/28)
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- Microwave assisted Suzuki reaction in N-butylpyridinium salts/water systems
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A solvent mixture containing the ionic liquid derived from 4-picoline (C4MPyBF4) and water was tested for the Suzuki-Miyaura reaction under microwave irradiation. This solvent system led to very high conversions and clean reactions. When compared with the other more common ionic liquid, such as C4MImBF4, C4MPyBF4 proved to be superior.
- Dos Santos Castro, Kelly L.,De Lima, Paulo G.,E Miranda, Leandro S.M.,De Souza, Rodrigo O.M.A.
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supporting information; experimental part
p. 4168 - 4171
(2011/09/19)
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- A general halide-to-anion switch for imidazolium-based ionic liquids and oligocationic systems using anion exchange resins (A- form)
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Further studies on the application of an AER (A- form) method broadened the anion exchange scope of representative ionic liquids and bis(imidazolium) systems. Depending on the hydrophobicity nature of the targeted imidazolium species and counte
- Alcalde, Ermitas,Dinares, Immaculada,Ibanez, Anna,Mesquida, Neus
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supporting information; scheme or table
p. 3266 - 3268
(2011/05/30)
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- METHOD FOR PRODUCING ONIUM SALTS WITH A LOW CHLORIDE CONTENT
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The invention relates to a method for producing onium salts with a low chloride content by reacting an onium chloride with an acid. According to the invention, the hydrochloric acid that is produced can be removed by co-ordination with an organic solvent, which forms an azeotropic mixture with water, and by subsequent azeotropic distillation.
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Page/Page column 20-21
(2008/06/13)
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- METHOD FOR THE PRODUCTION OF ONIUM SALTS WITH TETRAFLUOROBORATE ANION HAVING A REDUCED HALIDE CONTENT
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The invention relates to a method for producing onium salts with tetrafluoroborate anion by reacting an onium halide with an oxonium tetrafluoroborate, sulfonium tetrafluoroborate, or triphenylcarbonium tetrafluoroborate.
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Page/Page column 23
(2008/06/13)
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- Organic salt conditioner, organic salt-containing composition, and uses thereof
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The present invention relates to the use of, and a composition containing, at least one non-polymeric organic salt with a melting point of less than 60° C. These organic salts may be imidazolium, pyrazolium, pyridinium, pyrimidinium or tetraalkylphosphonium salts. The inventinon composition may be used for washing (cleaning) and/or conditioning keratin materials, and especially the hair.
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- Single step preparation of ionic fluids
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Preparation of ionic liquids (I) involves alkylating an amine, phosphine, imidazole, pyridine, triazole or pyrazole, corresponding to the cation of (I), with a halide (II) then replacing the sulfate anion by the anion of (I), the process is carried out without isolation of the intermediate. In the preparation of ionic liquids of formula (I) involves alkylating the amine, phosphine, imidazole, pyridine, triazole or pyrazole, corresponding to the cation A with a halide of formula (II) then replacing the sulfate anion X by the anion Yn-, the process is carried out without isolation of the intermediate. (A)n.(Yn-) (I) RX (II) n = 1 or 2; Yn- = BF4, BCl4, PF6, SbF6, AsF6, AlCl4, ZnCl3, CuCl2, SO4, CO3, R'COO, R'SO3 or (R'SO2)2N; R' = 1-12C linear, branched or cyclic alkyl, 5-18C aryl, (5-18C) aryl-(1-6C) alkyl or (1-6C) alkyl-(5-18C) aryl (all optionally halo-substituted); A = NR1R2R3R or PR1R2R3R; or 1-(R)-3-(R1)-imidazolium, (R1)-substituted 1-(R)-pyridinium, 1-(R)-2-(R1)-pyrazolium or 1-(R)-1,3,5-triazolium (all optionally ring-substituted by one or more of 1-6C alkyl, 1-6C alkoxy, 1-6C aminoalkyl, 5-12C aryl or (5-12C) aryl-(1-6C) alkyl); R1-R3 = H; 1-20C linear, branched or cyclic alkyl; Het or Het-(1-6C) alkyl; or Ar or Ar-(1-6C) alkyl; R = 1-20C linear, branched or cyclic alkyl; Het-(1-6C) alkyl; or Ar-(1-6C) alkyl; Het = heteroaryl containing 3-8C and at least one of N, O and S (optionally substituted by one or more of 1-6C alkyl and halo); Ar = 5-12C aryl (optionally substituted by one or more of 1-6C alkyl and halo); and X = halogen.
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