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  • Title: Preparation and characterization of biomass carbon-based solid acid catalyst for the esterification of oleic acid with methanol.
    Author: Liu T, Li Z, Li W, Shi C, Wang Y.
    Journal: Bioresour Technol; 2013 Apr; 133():618-21. PubMed ID: 23453798.
    Abstract:
    A solid acid catalyst, prepared by sulfonating carbonized corn straw, was proved to be an efficient and environmental benign catalyst for the esterification of oleic acid and methanol. Various synthetic parameters, such as carbonization temperature and time were systematically examined. It was found that the catalyst exhibited the highest acid density of 2.64 mmol/g by NaOH titration. A quantitative yield (98%) of ester was achieved, using the most active sulfonated catalyst at 333 K with a 7 wt.% catalyst/oleic acid ratio for 4h, at a 7:1 M ratio of methanol/oleic acid, while the commercial available Amberlyst-15 only gave 85% yield under the same reaction condition.
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