Catalytic Ketonisation over Oxide Catalysts. Part VII. Ketonisation and Cross-Ketonisation of Aliphatic Esters over CeO2 and ZrO2 Supported on Alumina

• Autorzy: Gliński M. , Szymański W. , Łomot D.
• Języki publikacji: EN

Abstrakty

EN

Catalysts of general formula xwt% MO2/Al2O3, where x = 10, 20 or 30 and M = Ce or Zr have been studied in the ketonisation and cross-ketonisation of aliphatic esters under flow conditions between 548-723 K. Ketonisation of ethyl pentanoate, heptanoate and nonanoate has led to nonan-5-one, tridecan-7-one and heptadecan-9-one, respectively. The conversion of esters increased with temperature and at 698 K a quantitative conversion was observed, irrespective of the type of ester used. A maximum yield of ketone (46% for nonan-5-one, 60% for tridecan-7-one and 50% for heptadecan-9-one) was observed at 673 K. As a result of the cross-ketonisation of a mixture of ethyl pentanoate and ethyl nonanoate (3:1 molar ratio), three ketones were formed: nonan-5- one, tridecan-5-one and heptadecan-9-one. At 698 K, maximum yields of ketones were noted (37, 46 and 8%, respectively) together with a 90% conversion of esters. The catalysts were characterized by XRD, TPR and surface area measurements.

Słowa kluczowe

EN

cerium and zirconium catalysts; synthesis of aliphatic ketones; ketonisation of esters

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 8
• Strony: 1033--1038
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Gliński M.

• Faculty of Chemistry, Warsaw University of Technology (Politechnika), Laboratory of Catalytic Synthesis, Noakowskiego 3, 00-664 Warsaw, Poland

autor

Szymański W.

• Faculty of Chemistry, Warsaw University of Technology (Politechnika), Laboratory of Catalytic Synthesis, Noakowskiego 3, 00-664 Warsaw, Poland

autor

Łomot D.

• Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland

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