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

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

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Abstract

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.

Item Type:Article
Keyword:Xylitol; Fatty acid; Sugar alcohol ester; Novozym 435.
Faculty or Institute:Faculty of Biotechnology and Biomolecular Sciences
Faculty of Science
Publisher:Chemical Publishing Co.
ID Code:22283
Deposited By: Nur Farahin Ramli
Deposited On:31 Dec 2013 16:46
Last Modified:09 Oct 2015 15:36

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