The synthesis of isobutyl alcohol ((BuOH)-Bu-i) from methanol (MeOH) and n-propanol (PrOH) through the Guerbet condensation has been studied at 200 degreesC and under inert atmosphere (3.0 MPa of N-2) using a two-component heterogeneous catalytic system based on pre-activated copper chromite and Mg-Al mixed oxides deriving from hydrotalcite-type (HT) precursors with different Mg/Al ratios. All the investigated catalysts displayed a significant activity, with an almost complete selectivity to TuOH. Unlike the copper chromite/soluble sodium methoxide system, the catalysts were tolerant of the co-produced water and did not display any appreciable deactivation during the course of the reaction. The catalyst productivity was found to increase by reducing the Mg/Al ratio in the heterogeneous base, according to the increase of the fraction of medium-strong and strong basic sites which favour the aldol condensation between the aldehydes derived from MeOH and PrOH. (C) 2004 Elsevier B.V. All rights reserved.

Guerbet condensation of methanol with n-propanol to isobutyl alcohol over heterogeneous copper chromite/Mg-Al mixed oxide catalysts

CARLINI, CARLO;RASPOLLI GALLETTI, ANNA MARIA;SBRANA, GLAUCO;
2004

Abstract

The synthesis of isobutyl alcohol ((BuOH)-Bu-i) from methanol (MeOH) and n-propanol (PrOH) through the Guerbet condensation has been studied at 200 degreesC and under inert atmosphere (3.0 MPa of N-2) using a two-component heterogeneous catalytic system based on pre-activated copper chromite and Mg-Al mixed oxides deriving from hydrotalcite-type (HT) precursors with different Mg/Al ratios. All the investigated catalysts displayed a significant activity, with an almost complete selectivity to TuOH. Unlike the copper chromite/soluble sodium methoxide system, the catalysts were tolerant of the co-produced water and did not display any appreciable deactivation during the course of the reaction. The catalyst productivity was found to increase by reducing the Mg/Al ratio in the heterogeneous base, according to the increase of the fraction of medium-strong and strong basic sites which favour the aldol condensation between the aldehydes derived from MeOH and PrOH. (C) 2004 Elsevier B.V. All rights reserved.
Carlini, Carlo; C., Flego; M., Marchionna; M., Noviello; RASPOLLI GALLETTI, ANNA MARIA; Sbrana, Glauco; F., Basile; A., Vaccari
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/199567
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 42
  • ???jsp.display-item.citation.isi??? 41
social impact