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Lipase-catalyzed synthesis of a sugar alcohol-based nonionic surfactant.


Citation

Adnani, Atena and Basri, Mahiran and Chaibakhsh, Naz and Salleh, Abu Bakar and Abdul Rahman, Mohd Basyaruddin (2011) Lipase-catalyzed synthesis of a sugar alcohol-based nonionic surfactant. Asian Journal of Chemistry, 23 (1). pp. 388-392. ISSN 0970-7077

Abstract / Synopsis

Synthesis of three xylitol fatty acid esters, namely xylitol stearate, palmitate and caprate, was performed in hexane using lipase as the biocatalyst. Enzyme screening results indicated that novozym 435 had the highest catalytic activity in the synthesis of ester. The conversion of substrates was significantly increased by using molecular sieve for water removal. The maximum conversions of three fatty acids, stearic acid, palmitic acid and capric acid to xylitol esters were 96, 92 and 88 %, respectively, at the optimum reaction conditions including temperature, 60 °C; time, 18 h; substrate molar ratio, 1; enzyme amount, 0.12 g and molecular sieve amount 4 g in 30 mL solvent. Subsequent analysis by GC-MS indicated that the amount of produced diesters was significantly more than mono, tri and tetra esters.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Biotechnology and Biomolecular Sciences
Faculty of Science
Publisher: Chemical Publishing Co.
Keywords: Xylitol; Fatty acid; Sugar alcohol ester; Novozym 435.
Depositing User: Nur Farahin Ramli
Date Deposited: 31 Dec 2013 08:46
Last Modified: 09 Oct 2015 07:36
URI: http://psasir.upm.edu.my/id/eprint/22283
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