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Metátesis de ésteres de ácidos grasos insaturados: autometátesis y metátesis cruzada de oleato de metilo empleando complejos inmovilizados

Juan Zelin Carlos Rodolfo Apesteguía Pedro Mancini Gustavo Romanelli Laura Briand Andrés Fernando Trasarti

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Resumen/Descripción – provisto por el repositorio digital
The present thesis comprises the valuation of oleochemical industry derivative how is methyl oleate (MO), obtaining from this valuable chemicals products through self-metathesis y cross-metathesis reactions with 1-hexene (C6) reactions, in liquid phase and heterogeneous catalytic process. Moroever, is evaluated the activity,selectivity and stability of the used catalyst, based all they in organometallics complex inmmobilized in inorganic soports. Two organometallics complexes were used: Hoveyda-Grubbs (HG) complex and methyltrioxorhenium (MTO) complex. The H-G in silica (H-G/silica) was achieved support, this catalyst showed high activity in self-metathesis of methyl oleate and can be used two consecutive catalytic cycles efficiently. Equilibrium conversions (50%) were reached, to give the products of self-metathesis:9-octadecene an 9-octadecen-1,18-dioate with 100% selectivity. The MTO was immobilized in silica, silica-alumina and gama-alumina. The best results were obtained when the comlex was sopported on silica-alumina, reaching the highest yields 9-octadecene (60%) The H-G/sílica catalyst was more efficient and active in self-metathesis of methyl oleate that MTO/silica-alumina catalyst, showing higher stability and activity of solids catalysts so far studied. Secondly, cross-metathesis MO and C6 over H-G/silica was studied. Yields and selectivity of cross-metathesis products increased with increasing C6 initial concentrations. In this reactions MO conversions close to 95% and selectivities of 90% were achieved.
Palabras clave – provistas por el repositorio digital

Oleato de metilo; 1-hexeno; Autometátesis; Metátesis cruzada; Hoveyda-Grubbs; Metiltrioxorenio; Methyl oleate; 1-hexene; Self-metathesis; Cross-metathesis; Methyltrioxorenium

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No requiere 2014 Biblioteca Virtual de la Universidad Nacional del Litoral (SNRD) acceso abierto

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Tipo de recurso:

tesis

Idiomas de la publicación

  • español castellano

País de edición

Argentina

Fecha de publicación