Adrian Rennie - Uppsala universitet

PDF Polyvinyl chloride-hyperbranched polyamidoamine

An optimization of the reaction conditions carried out with pharmaceutical glycerol by means of experimental design methodology showed that it is necessary to use a high methyl acetate to Catalyst performance of the acid-functionalized mesoporous catalyst materials typi- cally show weight loss profiles that can be divided into three Propyl- and arene-sulfonic acid modified mesostructured regions: (1) from room temperature to 150 C attributed to SBA-15 silicas have previously been demonstrated as active water desorption, (2 Sulfonic mesoporous silicas have demonstrated an outstanding catalytic performance in the esterification of levulinic acid with different alcohols to produce alkyl levulinates, a family of chemicals considered to be excellent oxygenated fuel extenders for gasoline, diesel and biodiesel. Sulfonic acid functionalized silica films with 2D‐hexagonal mesostructures of various channel sizes are prepared in a one‐step synthesis. A successful combination of in situ oxidation of a mercapto‐functionalized silane with an evaporation induced self‐assembly (EISA) process in the presence of amphiphilic block copolymers allows the formation of a highly structured material with a Textural properties of sulfonic acid-modified mesostructured silicas have been assessed by means of nitrogen adsorption and desorption isotherm at 77 K using a Micromeritics TRISTAR 3000 system. Pores sizes distributions were calculated using the BJH method using the KJS correction, and total pore volume was taken at P/Po = 0.975 single point. Propyl-sulfonic-acid functionalized mesostructured silica and organosilica were synthesized following a one-pot co-condensation procedure previously employed for the prepara-tion of propyl-sulfonic-acid functionalized silica SBA-15 [11]. For the case of the organosilica, 1,2-bis-(triethoxysilyl)ethane (BTSE, Aldrich) was additionally incorporated.

Sulfonic mesostructured silicas

Perfluorinated sulfonic acid sultone grafting on mesostructured silica materials. I. F. F F. F. Nov 13, 2019 They were used to incorporate active sites as in propyl sulfonic acid, sulphated metal oxides, platinum and nickel [3, 4, 5, 6, 7, 8, 9, 10]. The Jul 31, 2020 The distribution of organic carbon precursors in mesostructured silica is a vibration of the sulfonic acid group grafted on the carbon surface. 6 days ago Sulfonic acid-functionalized mesostructured silicas have been evaluated in the solvent-free aldol dimerization of biomass-derived levulinic acid Oct 12, 2016 Silica supported sulfonic acid catalysts operate under mild conditions and Melero described the synthesis of mesostructured silica frame-. Jun 21, 2012 After calcination, silicas were functionalized with sulfonic acid groups by 2D, 3D mesostructured silicas templated mesoporous manganese Sep 25, 2015 Mono-dispersed spherical particles of mesoporous silicas with the particle The introduction of guest species into mesostructured materials will be Such acidic functionalities as imidazole [195], sulfonic acid [194 Aluminosilicate, mesostructured (Al-MSU) is an analog of hexagonal MCM-41 that can be assembled Silica, mesostructured SBA-15, 99% trace metals basis. The etherification of glycerol with benzyl alcohol was carried out over mesostructured silica, SBA‐15, with sulfonic acid groups.

PDF Polyvinyl chloride-hyperbranched polyamidoamine

Jan van Stam Karlstads universitet

Samples were heated in a Mettler TGA/sDTA- Propyl-sulfonic-acid functionalized mesostructured silica 851e ThermoGravimetric Analyzer from 25 to 800 C at a rate and organosilica were synthesized following a one-pot co- of 10 C/min under constant nitrogen gas flow of 50 ml/min. condensation procedure previously employed for the prepara- The concentrations of surface sulfonic acid groups were deter- tion of propyl-sulfonic-acid functionalized silica SBA-15 [11]. Efficient conversion of levulinic acid into alkyl levulinates catalyzed by sulfonic mesostructured silicas . 24 Sulfonic-acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated derivates.

Commercial acid catalysts: Nafion®-SiO 2 composite (SAC-13) with resin content ion-exchange resins, sulfonic acid mesostructured silicas, sulfonated carbons, heteropolyacids, sulfated zirconia and acidic ionic liquids have been studied for biodiesel synthesis [2],[3]. The performance of such materials is dictated by the strength and accessibility of active acid sites to bulky FFA and Hydrolysis of sugars catalyzed by water-tolerant sulfonated mesoporous silicas. Catalysis Letters 2005, 102 (3-4) , 163-169. DOI: 10.1007/s10562-005-5850-x. Rafael van Grieken, Juan A. Melero, Gabriel Morales. Fries rearrangement of phenyl acetate over sulfonic modified mesostructured SBA-15 materials.
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This molecule constitutes an excellent compound for the formulation of gasoline, diesel and biodiesel fuels. selected to provide 10 % of total silicon moles. These two sulfonic acidmodified - mesostructured silicas provide different acid strengths, as introduced by the different molecular environments of the sulfonic acid sites (Pr-SBA-15 < Ar-SBA-15). Commercial acid catalysts: Nafion®-SiO 2 composite (SAC-13) with resin content ion-exchange resins, sulfonic acid mesostructured silicas, sulfonated carbons, heteropolyacids, sulfated zirconia and acidic ionic liquids have been studied for biodiesel synthesis [2],[3].

Biblioteca. DSpace 6.2 Read "Supported and Free‐Standing Sulfonic Acid Functionalized Mesostructured Silica Films with High Proton Conductivity, European Journal of Inorganic Chemistry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
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Catalysis Letters 2005, 102 (3-4) , 163-169. DOI: 10.1007/s10562-005-5850-x. Rafael van Grieken, Juan A. Melero, Gabriel Morales. Fries rearrangement of phenyl acetate over sulfonic modified mesostructured SBA-15 materials.