Sample records for CATALISIS HOMOGENEA (homogeneous catalysis)
from WorldWideScience.org

Sample records 1 - 15 shown.



1

Variables de operación en el proceso de transesterificación de aceites vegetales: una revisión - catálisis química/ Operations variables in the transesterification process of vegetable oil: a review - chemical catalysis

Rojas González, Andrés Felipe; Girón Gallego, Erika; Torres Castañeda, Harlen Gerardo
2009-12-01

Resumen en español Este artículo presenta los resultados de una revisión bibliográfica de los efectos de las variables de operación sobre el rendimiento en la transesterificación química de aceites vegetales. Las variables estudiadas fueron: temperatura y tiempo de reacción, concentración molar alcohol:aceite vegetal, tipo de alcohol, tipo de catalizador, concentración de catalizador, intensidad del mezclado, y concentración de ácidos grasos libre y humedad. También se reporta q (mas) ue este proceso se ha llevado a cabo empleando catalizadores ácidos y básicos, a través de procesos catalíticos homogéneos y heterogéneos, para una amplia variedad de aceites. Se encontró que el rendimiento de la reacción se incrementa cuando la temperatura y el tiempo de reacción aumenta, pero disminuye a bajas concentraciones de catalizador ( 1% w/w) y humedad (> 3% w/w) en el aceite. Resumen en inglés This article describes the results of a bibliographic review of the effects of operation conditions on process yield in the chemical transesterification of vegetable oil. The parameters studied were: temperature and time reaction, alcohol:oil molar ratio, catalyst and alcohol type, catalyst concentration, mixed intensity and free fatty acid and water concentration. It also reports that this process has been carried out with basic and acid catalysts using homogeneous and h (mas) eterogeneous catalytic processes for a wide variety of oils. It was found that reaction yield increased when temperature and time reaction increased; however this parameter decreased at low catalyst concentration ( 1% w/w) and water (> 3% w/w) concentration in oil.

Scientific Electronic Library Online (Spanish)

3

Mechanistic investigations of imine hydrogenation catalyzed by dinuclear iridium complexes

Martín, Marta; Sola, Eduardo; Tejero, Santiago; López, José A.; Oro, Luis A.
2006-03-01

Digital.CSIC (Spain)

4

Liquid-Phase Oxidation of p-Xylene using N-Hydroxyimides

Falcon, Horacio; Campos-Martin, Jose M.; Al-Zahrani, Saeed M.; Fierro, Jose L. G.
2010-01-01

Digital.CSIC (Spain)

5

Gold-catalyzed benzylic CH activation at room temperature

Hashmi, A. Stephen K.; Schäfer, Sascha; Wölfle, Michael; Diez Gil, Cesar; Fischer, Peter; Laguna, Antonio; Blanco, M. Carmen; Gimeno, M. Concepción
2007-07-01

Digital.CSIC (Spain)

6

Gold-Catalyzed [4C+3C] Intramolecular Cycloaddition of Allenedienes: Synthetic Potential and Mechanistic Implications

Trillo, Beatriz; López, Fernando; Montserrat, Sergi; Ujaque, Gregori; Castedo, Luis; Lledós, Agustí; Mascareñas, José L.
2009-02-19

Digital.CSIC (Spain)

9

Ethylbenzene Oxidation to its Hydroperoxide in the presence of N Hydroxyimides and Minute Amounts of Sodium Hydroxide

Toribio, Pedro P.; Gimeno-Gargallo, Ana; Capel-Sanchez, M. Carmen; de Frutos, M. Pilar; Campos-Martin, Jose M.

DRIVER (Spanish)

10

Ethylbenzene Oxidation to its Hydroperoxide in the presence of N Hydroxyimides and Minute Amounts of Sodium Hydroxide

Toribio Temprado, Pedro Pablo; Gimeno-Gargallo, Ana; Capel Sánchez, María del Carmen; de Frutos, M. Pilar; Campos Martín, Jose Miguel; Fierro, Jose L. G.
2009-01-01

Digital.CSIC (Spain)

11

Electron transfer to sulfides and disulfides: intrinsic barriers and relationship between heterogeneous and homogeneous electron-transfer kinetics

Meneses, Ana Belén; Antonello, Sabrina; Arévalo, Maria Carmen; González Martín, Concepción C.; Sharma, Jadab; Wallette, Andrea N.; Workentin, Mark S.; Maran, Flavio
2007-07-06

Digital.CSIC (Spain)

12

Effect of precursor nature on the behavior of titanium-polysiloxane homogeneous catalysts in primary alkene epoxidation

Blanco Brieva, Gema; Capel Sánchez, M.ª Carmen; Campos Martín, José Miguel; García Fierro, José Luis

8 pages, 6 figures.-- Printed version published on May 18, 2007. | This work describes the synthesis, some structural characteristics and the performance of a series of titanium-containing polysiloxanes as homogeneous catalysts. These polysiloxanes were synthesized by mixing a titanium precursor, su...

DRIVER (Spanish)

13

Effect of precursor nature on the behavior of titanium-polysiloxane homogeneous catalysts in primary alkene epoxidation

Blanco Brieva, Gema; Capel Sánchez, María del Carmen; Campos Martín, Jose Miguel; García Fierro, José Luis
2007-01-13

Digital.CSIC (Spain)

14

Development of microporous carbon xerogels by controlling synthesis conditions

Zubizarreta, Leire; Arenillas de la Puente, Ana; Domínguez Padilla, Antonio; Menéndez Díaz, José Ángel; Pis Martínez, José Juan
2008-02-01

Digital.CSIC (Spain)