Journal of the American Oil Chemists' Society

, Volume 90, Issue 2, pp 299–305 | Cite as

Polyol-Derived Alkoxide/Hydroxide Base Catalysts II: Transesterification Reactions

  • Hwee Yoong Felicia Gok
  • Shahram Emami
  • Jianhneg Shen
  • Martin J. T. Reaney
Original Paper


Biodiesel, fatty acid methyl ester (FAME), was produced by transesterification of canola oil with methanol in the presence of a series of alkoxide/hydroxide base catalysts produced from glycerol, 1,2-propanediol, 1,3-propanediol, xylitol, or sorbitol produced by dehydration reaction of sodium hydroxide in the presence of polyols. Transesterification reactions proceeded efficiently in the presence of sodium alkoxide catalysts prepared at three different mole ratios of sodium hydroxide to glycerol (1:1, 2:1, and 3:1). The production of methyl ester during the course of the reaction was determined repeatedly and the reaction progress was compared with that achieved in a reaction catalyzed by freshly prepared anhydrous sodium methoxide as a standard catalyst. Sodium alkoxide/hydroxide catalysts activity during the first 2 min of the reaction was in the order of: sorbitol < xylitol < sodium methoxide < 1,2-propanediol < 1,3-propanediol < glycerol regardless of the mole ratio of sodium hydroxide to glycerol. All catalysts showed a higher methyl ester accumulation at higher ratios of sodium hydroxide to polyol and had the following order 1:1 < 2:1 < 3:1 (sodium hydroxide:glycerol). Several of these catalysts were as powerful as sodium methoxide in catalyzing the transesterification reaction at the same mole concentration. All alkoxide/hydroxide catalysts resulted in a high FAME accumulation (>95 wt%) in a single transesterification batch reaction.


Polyol Metal alkoxide Sodium hydroxide Glycerol Catalyst Transesterification Biodiesel Methyl ester 



The results of this research were obtained from an unpublished MSc thesis in the University of Saskatchewan. The authors appreciate all the support provided by university authorities, professors and researchers to accomplish this research. They are grateful for financial support provided by the Natural Sciences and Engineering Research Council of Canada (NSERC) and Agriculture and Agri-Food Canada (AAFC) through the NSERC/AAFC Research Partnerships program, the Saskatchewan Ministry of Agriculture, Agriculture Development Fund, Milligan Biotechnology Inc., SaskCanola and Saskatchewan Mustard Development Commission.


  1. 1.
    Freedman B, Pryde E, Mounts T (1984) Variables affecting the yields of fatty esters from transesterified vegetable oils. J Am Oil Chem Soc 61:1638–1643CrossRefGoogle Scholar
  2. 2.
    Reaney MJT Westcott ND (2007) Methods for preparation and use of strong base catalysts. WO 2007/022621 A2Google Scholar
  3. 3.
    Gok HYF, Shen J, Emami S, Reaney MJT (2012) Polyol-derived alkoxide/hydroxide base catalysts I. production. J Am Oil Chem Soc (in press)Google Scholar
  4. 4.
    Van Gerpen JV, Shanks B, Pruszko R, Clements D, Knothe G (2004) Biodiesel production technology. National Renewable Energy Laboratory, Golden, pp 1–22Google Scholar
  5. 5.
    Gelbard G, Brès O, Vargas RM, Vielfaure F, Schuchardt UF (1995) 1H nuclear magnetic resonance determination of the yield of the transesterification of rapeseed oil with methanol. J Am Oil Chem Soc 72:1239–1241CrossRefGoogle Scholar
  6. 6.
    Ma F, Hanna MA (1999) Biodiesel production: a review. Bioresour Technol 70:1–15CrossRefGoogle Scholar
  7. 7.
    Boocock DGB, Konar SK, Mao V, Sidi H (1996) Fast one-phase oil-rich processes for the preparation of vegetable oil methyl esters. Biomass Bioenergy 11:43–50CrossRefGoogle Scholar
  8. 8.
    Murugesan A, Umarani C, Chinnusamy TR, Krishnan M, Subramanian R, Neduzchezhain N (2009) Production and analysis of bio-diesel from non-edible oils—a review. Renew Sustain Energy Rev 13:825–834CrossRefGoogle Scholar
  9. 9.
    Vicente G, Martínez M, Aracil J, Esteban A (2005) Kinetics of sunflower oil methanolysis. Ind Eng Chem Res 44:5447–5454CrossRefGoogle Scholar
  10. 10.
    Bancquart S, Vanhove C, Pouilloux Y, Barrault J (2001) Glycerol transesterification with methyl stearate over solid basic catalysts: I. Relationship between activity and basicity. Appl Catal A-Gen 218:1–11CrossRefGoogle Scholar
  11. 11.
    Martinello MA, Molina F, Pramparo M (2005) Purification of crude monoglycerides by two stages molecular distillation. 2nd Mercosur congress on chemical engineering. Rio de JaneiroGoogle Scholar
  12. 12.
    Shaw J-F, Lo S (1994) Production of propylene glycol fatty acid monoesters by lipase-catalyzed reactions in organic solvents. J Am Oil Chem Soc 71:715–719CrossRefGoogle Scholar

Copyright information

© AOCS 2012

Authors and Affiliations

  1. 1.Department of Plant SciencesUniversity of SaskatchewanSaskatoonCanada

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