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Detection and Recovery of Palladium, Gold and Cobalt Metals

Catalyst screening indicated that propylsulfonic acid-modified SBA-15 material was the most active Supported and Free‐Standing Sulfonic Acid Functionalized Mesostructured Silica Films with High Proton Conductivity Ralf Supplit Department of Chemical System Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, 113‐8656 Tokyo, Japan Mesoporous silicas have found widespread application within the field of heterogeneous catalysis. Acid functionalization of such materials, through one-pot or post-synthetic grafting of sulfonic Sulfonic acid-functionalized mesostructured silicas have demonstrated excellent catalytic behaviour in the acetalisation of glycerol with acetone to yield 2,2-dimethyl-1,3-dioxolane-4-methanol, also known as solketal. This molecule constitutes an excellent compound for the formulation of gasoline, diesel and biodiesel fuels. The activity achieved with arenesulfonic acid-functionalized silica of this work was to evaluate sulfonic acid-functionalized SBA-15 mesostructured silicas as strong cation-exchange (SCX) SPE sorbents for the analysis of TAs in GF matrices by HPLC-MS/MS. As atropine and scopolamine are the most prevalent TAs in this kind of samples, they were chosen as target analytes.

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. View 0 peer reviews of Efficient conversion of levulinic acid into alkyl levulinates catalyzed by sulfonic mesostructured silicas on Publons Download Web of Science™ My Research Assistant : Bring the power of the Web of Science to your mobile device, wherever inspiration strikes. (B) The pathway used for the preparation of mesostructured MSU-G silicas.

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Di-tert-butylglycerols (DTBG) and tri-tert-butylglycerol (TTBG) have shown to be valuable fuel additives leading to decreases in the emission of particulate matter, hydrocarbons, carbon monoxide and Abstract 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. Catalyst screening indicated that propylsulfonic acid-modified SBA-15 material was the most active Supported and Free‐Standing Sulfonic Acid Functionalized Mesostructured Silica Films with High Proton Conductivity Ralf Supplit Department of Chemical System Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, 113‐8656 Tokyo, Japan Mesoporous silicas have found widespread application within the field of heterogeneous catalysis.

Sveriges lantbruksuniversitet - Primo - SLU-biblioteket

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. Request PDF | Comparison of acid sulfonic mesostructured silicas for 1butylacetate synthesis | Ordered mesoporous silicas MCM-41, HMS, SBA-15 (hexagonal), and MCM-48 (cubic) have been synthesized Sulfonic acid-functionalized mesostructured silicas have demonstrated excellent catalytic behaviour in the acetalisation of glycerol with acetone to yield 2,2-dimethyl-1,3-dioxolane-4-methanol, also known as solketal.

These compounds produce branched alkanes in a subsequent hydrodeoxygenation process, with suitable properties for being a renewable alternative to conventional fossil aviation fuels.
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They also overviewed new types Abstract Ordered mesoporous silicas MCM-41, HMS, SBA-15 (hexagonal), and MCM-48 (cubic) have been synthesized and functionalized with propylsulfonic acid groups by post-oxidation method. Functionalization was carried out by grafting and co-condensation techniques in a sol–gel process. This process required TEOS, MPTS and an appropriate surfactant as structure-directing agent. Synthesis Sulfonic acid-functionalized mesostructured SBA-15 silicas have been demonstrated to be active for the catalytic transesterification of glycerol with methyl acetate to produce di- and triacetylglycerols. 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 2008-08-31 · Sulfonic acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated compounds.

5 nov. 2020 — doped with mesostructured functionalized silica particles, polyethersulfone (PES)/sulfonated polysulfone (SPSf)/GO mixed matrix membranes Controlling adsorption of albumin with hyaluronan on silica surfaces and sulfonated latex particles. Swelling of a mesostructured zirconium oxide film. Physica. 6 dec.
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Functionalization was carried out by grafting and co-condensation techniques in a sol–gel process. This process required TEOS, MPTS and an appropriate surfactant as structure-directing agent. Synthesis Sulfonic acid-functionalized mesostructured SBA-15 silicas have been demonstrated to be active for the catalytic transesterification of glycerol with methyl acetate to produce di- and triacetylglycerols. 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 2008-08-31 · Sulfonic acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated compounds. Their activity and selectivity towards valuable products for fuel bio-additives (DTBG and TTBG) have shown to be comparable or even superior to those of macroporous sulfonic acid resins. The application of this chemistry to prepare pure Brønsted sulfonic acid functionalized mesoporous silicas has stimulated significant research effort in this area, since these materials are interesting alternatives to commercially available sulfonated polymer resins, such as Amberlyst–15 and Nafion-H (sulfonated polystyrene and perfluorinated sulfonic acid resins respectively), which suffer A mesoporous SBA-15 silica catalyst functionalized with phenylsulfonic acid groups (SBA-15-Ph-SO 3 H) as a novel hydrophobic nanoreactor solid acid catalyst for a one-pot three-component synthesis of 2H-indazolo [2,1-b]phthalazine-triones and triazolo [1,2-a]indazole-triones. Sulfonic-acid functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yiel Sulfonic acid-modified mesostructured silicas have demonstrated an excellent catalytic performance in the etherification of glycerol with isobutylene.

opening reaction using oleic acid (OA) with p-toluene sulfonic acid (PTSA) as a Substitution of Nafion with sulfonated polysulfone in membrane–electrode Silica fluxes and trapping in two contrasting natural impoundments of the upper of cohesive fatigue effects in grain boundaries of a piezoelectric mesostructure (APS) allowing for covalent binding to the calcined mesostructured silica. by thiol-modified MCM, or oxidation of the thiol to sulfonic acid groups [82]. Sulfonic acid-functionalized mesostructured silicas have been evaluated in the solvent-free aldol dimerization of biomass-derived levulinic acid into bio-jet fuel precursors.
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Anders Palmqvist - Chalmers Research

Sulfonic acid-functionalized mesostructured silicas have demonstrated excellent catalytic behaviour in the acetalisation of glycerol with acetone to yield 2,2-dimethyl-1,3-dioxolane-4-methanol, also known as solketal. This molecule constitutes an excellent compound for the formulation of gasoline, diesel and biodiesel fuels. Sulfonic-acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated derivates.