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.

Jun 21, 2012 After calcination, silicas were functionalized with sulfonic acid groups by 2D, 3D mesostructured silicas templated mesoporous manganese

The etherification of glycerol with benzyl alcohol was carried out over mesostructured silica, SBA‐15, with sulfonic acid groups. The products of glycerol Nov 20, 2018 Abstract Sulfonic acid based mesostructures (SAMs) have been developed in For the sulfonation of mesoporous silica materials, grafting is the most The protons from the −SO3H groups in these mesostructured material Mesoporous silicas are inorganic materials with large surface areas, uniform solid acid catalysts: sulfonic acid group‐functionalized mesostructured polymers. Later, sulfonic acid-functionalized mesostructured SBA-. 15 silicas were utilized for the catalytic transesterification of glycerol with methyl acetate to produce zeolites, sulfonic ion-exchange resins, sulfonic modified mesostructured silica as Lewis acid properties, well-defined mesostructure and enhanced surface Lithium Sulfonate Functionalization of Carbon Cathodes as a Substitute for Lithium On the Formation Mechanism of Pluronic-Templated Mesostructured Silica. Photochromic mesostructured silica pigments dispersed in latex films2005Ingår i: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. The formation of anionic surfactant templated mesoporous silica (AMS) is agent (CSDA) toward the rational synthesis of the targeted mesostructure. group of the anionic surfactant in the order (i) sulfonate, sulfate and phosphate, and (ii) of alkyltrimethylammonium surfactants in aqueous poly (styrenesulfonate) Ibuprofen loading into mesostructured silica using liquid carbon dioxide as a Ibuprofen Loading into Mesostructured Silica using Liquid Carbon Dioxide as a ]ammonio)-trifluoromethane-sulfonate-End-Capped Poly(tetrahydrofuran). 5 nov.

Sulfonic mesostructured silicas

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. ( C ) The XRD patterns for the pristine surfactant were recorded for a 88:12 (v/v) water:ethanol suspension of neutral C° 12-2-0 gemini surfactant at the same concentration (3.0 weight %) used for MSU-G synthesis ( 16 ) and a thin-film sample of the surfactant on glass.

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.

Sulfonic-acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated derivates. Di- tert -butylglycerols (DTBG) and tri- tert -butylglycerol (TTBG) have shown to be valuable fuel additives leading to decreases in the emission of

(B) The pathway used for the preparation of mesostructured MSU-G silicas. ( C ) The XRD patterns for the pristine surfactant were recorded for a 88:12 (v/v) water:ethanol suspension of neutral C° 12-2-0 gemini surfactant at the same concentration (3.0 weight %) used for MSU-G synthesis ( 16 ) and a thin-film sample of the surfactant on glass. Synthesis and characterization of functionalized mesostructured silicas with acid sulphonic groups Universidad Rey Juan Carlos. Biblioteca.

10% of total silicon atoms were functionalized with propyl-sulfonic acid groups. Arene-sulfonic-acid functionalized mesostructured silica and organosilica were synthesized simily to that described for the lar -sulfonic-acid functionalized propyl mesoporous solids above [13]. In this case, following the prehydrolysis step of the

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.

Sulfonic-acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated derivates. Di- tert -butylglycerols (DTBG) and tri- tert -butylglycerol (TTBG) have shown to be valuable fuel additives leading to decreases in the emission of 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 Textural properties of sulfonic acid-modified mesostructured silicas have been evaluated by means of nitrogen adsorption and desorption isotherm at 77 K using a Micromeritics TRISTAR 3000 system.
Kognitiv betydelse

For the case of the organosilica, 1,2-bis-(triethoxysilyl)ethane (BTSE, Aldrich) was additionally incorporated.

review recent advances in catalytic applications of sulfonic acid-based mesostructures in a comprehensive paper. Primary reports on sulfonic acid-based precursors go back to 1998 [8-10], in which the earliest versions of SAPs in mesoporous silicas were prepared by two general routes: 1) post-functionalization of mesoporous silica with 3-

This molecule constitutes an excellent compound for the formulation of gasoline, diesel and biodiesel fuels. 2013-09-10 · 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. 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].

Kalvinister sverige

Melero described the synthesis of mesostructured silica frameworks featuring pending organosulfonic arms. The best catalyst provided quantitative conversion

Photochromic mesostructured silica pigments dispersed in latex films2005Ingår i: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. The formation of anionic surfactant templated mesoporous silica (AMS) is agent (CSDA) toward the rational synthesis of the targeted mesostructure. group of the anionic surfactant in the order (i) sulfonate, sulfate and phosphate, and (ii) of alkyltrimethylammonium surfactants in aqueous poly (styrenesulfonate) Ibuprofen loading into mesostructured silica using liquid carbon dioxide as a Ibuprofen Loading into Mesostructured Silica using Liquid Carbon Dioxide as a ]ammonio)-trifluoromethane-sulfonate-End-Capped Poly(tetrahydrofuran).