Sample records for HIDROXIDOS DE SODIO (sodium hydroxides)
from WorldWideScience.org

Sample records 1 - 12 shown.



1

OBTENCIÓN DE MONOGLICÉRIDOS DE ACEITE DE RICINO EMPLEANDO GLICERINA REFINADA Y CRUDA: ESTUDIO DE LAS PRINCIPALES VARIABLES DEL PROCESO/ PRODUCTION OF MONOGLYCERIDES FROM CASTOR OIL USING CRUDE AND REFINED GLYCERIN: STUDY OF THE MAIN VARIABLES OF THE PROCESS

CARDONA V, Sandra M; GONZÁLEZ C, Rodrigo; FRANCO C, Alexander; CARDEÑO L, Fernando; RÍOS, Luis A
2010-05-01

Resumen en español Los monoglicéridos son ampliamente usados como emulsionantes en las industrias alimentaria, farmacéutica y cosmética. En este estudio se reportó la producción de monoglicéridos de aceite de ricino por reacciones de glicerólisis usando glicerina USP y la glicerina cruda, subproducto del proceso de producción del biodiesel de palma. Se emplearon catalizadores básicos como hidróxidos metálicos y óxido de plomo, y ácidos como acetato de plomo. Los resultados señ (mas) alan que los catalizadores basados en plomo proporcionaron mayores conversiones hacia los monoglicéridos que los basados en sodio, potasio y calcio. Se encontró que una alta relación molar de aceite/glicerina fue una variable determinante que favorece altas concentraciones de monoglicéridos. Finalmente, se demostró que el uso de glicerina cruda para la producción de monoglicéridos es factible, aunque en este caso la concentración de monoglicéridos obtenidos se disminuye aproximadamente en un 20% debido, probablemente, al envenenamiento de los catalizadores. Resumen en inglés Monoglycerides are widely used as emulsifiers in food, pharmaceutical and cosmetic industries. In this article was reported the production of monoglycerides from castor oil, by glicerolysis reactions, using USP glycerine and crude glycerol derived from a palm-biodiesel production process. Metalic hydroxides and lead oxide were used as basic catalysts, while lead acetate was used as acid catalyst. Results showed that the lead-based catalysts exhibited higher conversions to (mas) monoglycerides respect to those based on sodium, potassium and calcium. We found that a high molar ratio oil/glycerol was a determinant variable that favors high concentrations of monoglycerides. Ultimatelly, it was shown that it is feasible to use crude glycerol for the production of monoglycerides, although in this case the concentration of monoglycerides is reduced 20% due to the poisoning of the catalysts.

Scientific Electronic Library Online (Spanish)

2

Tailoring the textural properties of activated carbon xerogels by chemical activation with KOH

Zubizarreta, Leire; Arenillas de la Puente, Ana; Pirard, Jean-Paul; Pis Martínez, José Juan; Job, Nathalie
2008-03-04

Digital.CSIC (Spain)

3

Stability of Synthetic Calcium Silicate Hydrate Gels in Presence of Alkalis, Aluminum, and Soluble Silica

García Lodeiro, I.; Fernández-Jiménez, Ana; Macphee, D. E.; Sobrados, I.; Sanz, J.; Palomo Sánchez, Ángel
2010-05-01

Digital.CSIC (Spain)

4

Simultaneous speciation of arsenic, selenium, antimony and tellurium species in waters and soil extracts by capillary electrophoresis and UV detection

Casiot, Corinne; Barciela, Mª del Carmen; Boisson, Jolanda; Donard, Olivier F. X.; Potin-Gautier, Martine
1998-01-01

Digital.CSIC (Spain)

5

Method for obtaining nanoparticles through reaction in oil-in-water-type microemulsions

Solans Marsa, Concepción; Sánchez Domínguez, Margarita; Boutonnet, Magali
2010-01-21

Digital.CSIC (Spain)

6

Lixiviación ácida de concentrados de scheelita

Navarro Donoso, Patricio; Vargas, C.; Alguacil, Francisco José
2005-04-30

Digital.CSIC (Spain)

8

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)

10

Effect on fresh C-S-H gels of the simultaneous addition of alkali and aluminium

García Lodeiro, I.; Fernández-Jiménez, Ana; Palomo Sánchez, Ángel; Macphee, D.E.
2010-01-01

Digital.CSIC (Spain)

11

Effect of Calcium Additions on N–A–S–H Cementitious Gels

García Lodeiro, I.; Fernández-Jiménez, Ana; Palomo Sánchez, Ángel; Donald E., Macphee
2010-06-01

Digital.CSIC (Spain)

12

Alkaline activation of metakaolin–fly ash mixtures: Obtain of Zeoceramics and Zeocements

Fernández-Jiménez, Ana; Monzó, M.; Vicent, M.; Barba, A.; Palomo Sánchez, Ángel
2008-02-01

Digital.CSIC (Spain)