ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTS

The continuous enantioselective hydrogenation of ethyl pyruvate (EP) in a continuous flow reactor at 25°C on l%Pt-CD/Si0(2) catalysts has been studied. The catalytic study included the analysis of variables such as: particle size, feed flow, H2 pressure and the addition of chiral modifier to the rea...

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Autores principales:	RUIZ,DORIS, REYES,PATRICIO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2008
Materias:	Continuous hydrogenation Nanoparticles Platinum Ethyl Pyruvate Cinchonidine
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000400024
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spelling	oai:scielo:S0717-970720080004000242009-05-22ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTSRUIZ,DORISREYES,PATRICIO Continuous hydrogenation Nanoparticles Platinum Ethyl Pyruvate Cinchonidine The continuous enantioselective hydrogenation of ethyl pyruvate (EP) in a continuous flow reactor at 25°C on l%Pt-CD/Si0(2) catalysts has been studied. The catalytic study included the analysis of variables such as: particle size, feed flow, H2 pressure and the addition of chiral modifier to the reactor feed. The catalysts were prepared using impregnation of Pt colloids which are stabilized with different quantities of cinchonidine (CD) on Si0(2). This process gives chiral properties to the catalyst and allows changing the particle size for the reaction of interest. The catalysts were characterized by adsorption/desorption isotherms of N2 a 77 K, TEM, XPS and the analysis of producis by GC-MS. The monitoring of the reaction indicates a significant increases in the conversion when deereasing the contact time and a maximum in the enantiomeric excess (ee) of 63 % to the (R)-ethyl lactate which is obtained after using 200mg of l%Pt/Si0(2) catalyst (1.6nm) at 10 bar of H2 and a flow of 0.3 mL/min of a mixture EP (0.01M) and CD (0.034M) in cyclohexane.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.53 n.4 20082008-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000400024en10.4067/S0717-97072008000400024
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Continuous hydrogenation Nanoparticles Platinum Ethyl Pyruvate Cinchonidine
spellingShingle	Continuous hydrogenation Nanoparticles Platinum Ethyl Pyruvate Cinchonidine RUIZ,DORIS REYES,PATRICIO ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTS
description	The continuous enantioselective hydrogenation of ethyl pyruvate (EP) in a continuous flow reactor at 25°C on l%Pt-CD/Si0(2) catalysts has been studied. The catalytic study included the analysis of variables such as: particle size, feed flow, H2 pressure and the addition of chiral modifier to the reactor feed. The catalysts were prepared using impregnation of Pt colloids which are stabilized with different quantities of cinchonidine (CD) on Si0(2). This process gives chiral properties to the catalyst and allows changing the particle size for the reaction of interest. The catalysts were characterized by adsorption/desorption isotherms of N2 a 77 K, TEM, XPS and the analysis of producis by GC-MS. The monitoring of the reaction indicates a significant increases in the conversion when deereasing the contact time and a maximum in the enantiomeric excess (ee) of 63 % to the (R)-ethyl lactate which is obtained after using 200mg of l%Pt/Si0(2) catalyst (1.6nm) at 10 bar of H2 and a flow of 0.3 mL/min of a mixture EP (0.01M) and CD (0.034M) in cyclohexane.
author	RUIZ,DORIS REYES,PATRICIO
author_facet	RUIZ,DORIS REYES,PATRICIO
author_sort	RUIZ,DORIS
title	ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTS
title_short	ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTS
title_full	ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTS
title_fullStr	ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTS
title_full_unstemmed	ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTS
title_sort	enantioselective hydrogenation of ethyl pyruvate in flow reactor overpt-cd/si0(2) catalysts
publisher	Sociedad Chilena de Química
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000400024
work_keys_str_mv	AT ruizdoris enantioselectivehydrogenationofethylpyruvateinflowreactoroverptcdsi02catalysts AT reyespatricio enantioselectivehydrogenationofethylpyruvateinflowreactoroverptcdsi02catalysts
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ENANTIOSELECTIVE HYDROGENATION OF ETHYL PYRUVATE IN FLOW REACTOR OVERPt-CD/Si0(2) CATALYSTS

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