Search Results - "Fripiat, J. J"

An Infrared Spectroscopic Study of Acetone and Mesityl Oxide Adsorption on Acid Catalyst by Panov, A, Fripiat, J. J

“…The interactions between the acetone carbonyl and the carbonyl and double bond of mesityl oxide and the Brönsted and Lewis acid sites of acid catalysts have…”
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Y zeolite depolymerization–recrystallization: Simultaneous formation of hierarchical porosity and Na dislodging by Guzmán-Castillo, M.L., Armendáriz-Herrera, Héctor, Pérez-Romo, P., Hernández-Beltrán, F., Ibarra, S., Valente, J.S., Fripiat, J.J.

“…[Display omitted] ► DR process of Na–Y produced a Y zeolite supported on a mesoporous material. ► The presence of ammonium during the recrystallization yields…”
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Crystallization of faujasite Y from seeds dispersed on mesoporous materials by Pérez-Romo, Patricia, Armendáriz-Herrera, Héctor, Valente, Jaime S., Guzmán-Castillo, Maria de Lourdes, Hernández-Beltrán, Francisco, Fripiat, José J.

“…An original procedure to obtain a solid which combines the microporosity of a Y zeolite with a broad distribution of mesoporosity is described. The starting…”
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Synthesis of silicalite-1 from organo-silicic gels by Sánchez-Flores, Norma A., Pacheco-Malagón, Graciela, Pérez-Romo, Patricia, Armendáriz, Héctor, Valente, Jaime S., Guzmán-Castillo, María de L., Alcaraz, Jorge, Baños, Leticia, Blesa, J.M. Saniger, Fripiat, J.J.

“…Well crystallized silicalite-1 has been obtained from three sources of amorphous silica, namely, rice hull ashes, commercial Davisil, and a fume silica from…”
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Acetone Condensation Reaction on Acid Catalysts by Panov, A.G., Fripiat, J.J.

“…The condensation reaction of acetone on alumina and acid zeolites has been followed by FTIR. Under identical conditions, the reaction rate is faster on…”
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Physical Chemistry of the Thermal Transformation of Mesoporous and Microporous Zirconia by Pacheco, G, Fripiat, J. J

“…In fine-grained zirconia, the order of stability of the three polymorphs is exactly the reverse of that observed in a coarse-grained sample. Starting from a…”
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Silicalite-1, an adsorbent for 2-, 3-, and 4-chlorophenols by Sánchez-Flores, N A, Solache, M, Olguín, M T, Legaspe, J, Pacheco-Malagón, G, Saniger, J M, Martinez, E, Bulbulian, S, Fripiat, J J

“…The adsorption of the three chlorophenol isomers, ortho, meta and para, by silicalite-1 has been studied at 30 °C, below the solubility (at the same…”
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Infrared spectroscopy study of tetrahedral and octahedral substitutions in an interstratified illite-smectite clay by SRASRA, E, BERGAYA, F, FRIPIAT, J. J

“…Abstract Infrared spectroscopy is used to distinguish between octahedral and tetrahedral substitutions in an interstratified illite-smectite clay. The…”
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NH3 as a Probe Molecule for NMR and IR Study of Zeolite Catalyst Acidity by Yin, F, Blumenfeld, A. L, Gruver, V, Fripiat, J. J

“…The measurement of the numbers of Brönsted and Lewis acid sites has been performed quantitatively using NH3 as an infrared molecular probe. The assignment of…”
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Active sulfated alumina catalysts obtained by hydrothermal treatment by Guzmán-Castillo, M.L, López-Salinas, E, Fripiat, J.J, Sánchez-Valente, J, Hernández-Beltrán, F, Rodrı́guez-Hernández, A, Navarrete-Bolaños, J

“…The structural and surface properties of sulfated γ-Al 2O 3 prepared by hydrothermally aging precipitates obtained from aluminum sulfate and ammonia have been…”
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Physicochemical properties of aluminas obtained from different aluminum salts by Guzmán-Castillo, M.L., Hernández-Beltrán, F., Fripiat, J.J., Rodriquez-Hernández, A., León, R. García de, Navarrete-Bolaños, J., Tobón-Cervantes, A., Bokhimi, X.

“…Al 2O 3 materials were obtained by calcination of boehmite samples of varying crystallinity at 600 °C. Boehmites were obtained from Al 2(SO 4) 3·18H 2O or AlCl…”
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Lewis Acid Sites and Surface Aluminum in Aluminas and Zeolites: A High-Resolution NMR Study by Coster, D, Blumenfeld, A. L, Fripiat, J. J

“…It was the main purpose of this work to study the nature of Lewis acidity in various catalysts (aluminas and zeolites) pretreated under controlled atmosphere…”
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A Lewis Acid Site-Activated Reaction in Zeolites: Thiophene Acylation by Butyryl Chloride by Isaev, Yu, Fripiat, J.J.

“…The acylation of thiophene by butyryl chloride has been studied in the liquid phase in the presence of 12 catalysts: HZSM-5, H-mordenite, and HY (ultrastable…”
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Crystallization of Zeolites from Organo-Silicic Colloids by Pacheco-Malagón, Graciela, Pérez-Romo, Patricia, Sánchez-Flores, Norma A, Guzmán-Castillo, María L, López-Franco, Carlos, Saniger, José M, Hernández-Beltrán, Francisco, Fripiat, José J

“…As shown recently, the networks of mesoporous high-surface-area silicates and zeolites undergo a deep depolymerization process in glycerol, near 200 °C. Within…”
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Selectivity of the Cd2+/Ca2+ exchange on modified rice hull silica by Sánchez-Flores, Norma A., Solache, Marcos, Olguín, Ma. Teresa, Fripiat, José J., Pacheco-Malagón, Graciela, Saniger, José M., Bulbulian, Silvia

“…The rice hull ash is composed by 94% of SiO2, an agricultural waste that can be recovered and purified by a depolymerization reaction yielding an…”
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New synthesis technique of supported ZSM-5 using organo-alumino-silicic gels by Pacheco-Malagón, G., Sanchez-Flores, Norma. A., Saniger-Blesa, J., Baños, L., Pérez-Romo, P., Valente, Jaime S., Guzman-Castillo, Marı´a de L., Hernández-Beltrán, F., Fripiat, José J.

“…This contribution deals with the synthesis of a silicon-rich ZSM-5 obtained from an amorphous organo-alumino-silicic gel. The gel was formed by reacting a…”
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Synthesis of Highly Porous Aluminas Mediated by Cationic Surfactant: Structural and Textural Properties by Toledo, J.A., Bokhimi, X., Lopez, C., Angeles, C., Hernandez, F., Fripiat, J.J.

“…The cationic surfactant cetyltrimetylammonium bromide was used to synthesize mesostructured γ–Al2O3. The effects of the surfactant concentration and of the sol…”
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Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds by Sánchez-Flores, Norma, Navarrete-Bolaños, Juan, Pérez-Romo, Patricia, Pacheco-Malagón, Graciela, Laredo, Georgina, Fripiat, José

“…The adsorption capacities of two synthesized zeolites (crystalline ZSM-5 and semi-crystalline faujasite Y) for a mixture of indole, quinoline and carbazole…”
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Quantitative relationships between boehmite and γ-alumina crystallite sizes by Sánchez-Valente, J., Hernández-Beltrán, F., Guzman-Castillo, M.L., Fripiat, J.J., Bokhimi, X.

“…Nanocrystalline boehmite obtained by limited hydrolysis of aluminum tri-sec-butoxide or aluminum chloride was aged under different conditions before being…”
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Local Order in Depolymerized Silicate Lattices by Pacheco-Malagón, Graciela, Pérez-Romo, Patricia, Sanchez-Flores, Norma A, Guzmán-Castillo, María L, López, Carlos, Saniger, José M, Hernández-Beltrán, Francisco, Fripiat, José J

“…In glycerol, near 200 °C, the silicate networks of mesoporous silicates and zeolites undergo a deep depolymerization process. In a few hours, depending on the…”
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