Homogeneously catalyzed batch reactor glycerol etherification by CsHCO3

Manfred Richter, Yuni Krisyuningsih, Reinhard Eckelt, Andreas Martin

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

The CsHCO3 catalyzed liquid-phase etherification of glycerol to oligomers was studied in a discontinuous batch reactor at 260 °C under normal pressure. Concentration vs. time profiles at 0.1, 0.2 and 0.4 wt% CsHCO3 addition confirmed the consecutive reaction of diglycerol to higher oligomers. Maximum concentration of the target product, linear diglycerol, was observed after intermediate reaction times of 8 h. Independent of the catalyst concentration, a unique conversion-selectivity profile was observed with 100% linear diglycerol at low glycerol conversion but only 10% at complete glycerol conversion. The α,α′ configurational diglycerol isomer prevailed and was preferentially oligomerized. Interconversion of the configurational isomers was not observed. The conversion of glycerol obeyed a 1st order kinetics.

Original languageEnglish
Pages (from-to)2112-2116
Number of pages5
JournalCatalysis Communications
Volume9
Issue number11-12
DOIs
Publication statusPublished - 30 Jun 2008

Keywords

  • Cesium hydrogencarbonate
  • Etherification
  • Glycerol
  • Linear diglycerol

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