Process for producing biodiesel from renewable oil under...

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound

Reexamination Certificate

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C435S041000, C435S132000, C435S134000, C554S169000

Reexamination Certificate

active

07550278

ABSTRACT:
The present invention provides a new process for producing biodiesel from renewable oil under lipase catalysis in an organic medium reaction system. In this process, a short chain alcohol ROH is used as an acyl acceptor, a relatively hydrophilic organic solvent having no negative effect on the reactivity of lipase is used as the reaction medium, and a renewable oil raw material is catalyzed by a lipase to synthesize biodiesel through a transesterification reaction. In the process of the present invention, the renewable oil raw material can be almost completely converted into biodiesel and a byproduct glycerin, and the yield of the biodiesel is 94% or more. This new type organic medium reaction system promotes the solubility of the short chain alcohol in the renewable oil raw material, and dissolves part of the byproduct glycerin. Consequently, the reaction time is shortened, the productivity of biodiesel is increased and the reactivity and lifetime of the lipase is improved in the process of the present invention.

REFERENCES:
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JP 2002-233393, National Research Inst of Brewing, English translation, Aug. 20, 2002.
WO 03004591, Siegfried et al. , English translation, Jan. 16, 2003.
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Shimada; Y.; Watanabe, Y.; Sugihara, A.; Tominaga, Y.; “Enzymatic alcoholysis for biodiesel fuel production and application of the reaction to oil processing”; Journal of Molecular Catalysis B: Enzymatic (2002) vol. 17, No. 32 pp. 133-142.
Nelson, L; Foglia, T. and Marmer, W. ;“Lipase-Catalysed Production of Biodiesel”; Journal of the American Oil Chemists' Society, AOCS Press, Champaign, IL; vol. 73, No. 9, Sep. 1, 1996; pp. 1191-1195; XP000626753, ISSN: 003-021X.
Iso, M., Chen, B., Eguchi, M., Kudo, T. and Shrestha, S.; “Production of biodiesel fuel from triglycerides and alcohol using immobilized lipase”; Journal of Molecular Catalysis B: Enzymatic, Elsevier, Amsterdam, NL, vol. 16, No. 1 Nov. 20, 2001, pp. 53-58, XP002417337; ISSN: 1381-1177.

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