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Synthesis of 2-ethylhexyl-2-ethylhexanoate catalyzed by immobilized lipase in n-hexane: A kinetic study

Paper ID Volume ID Publish Year Pages File Format Full-Text
4484 228 2007 6 PDF Available
Title
Synthesis of 2-ethylhexyl-2-ethylhexanoate catalyzed by immobilized lipase in n-hexane: A kinetic study
Abstract

A direct esterification reaction for the synthesis of 2-ethylhexyl-2-ethylhexanoate from 2-ethylhexanoic acid and 2-ethyl-1-hexanol in n-hexane as solvent, and Novozym 435, as catalyst, has been carried out. The effect of concentrations of 2-ethylhexyl-2-ethylhexanoate, water, 2-ethylhexanoic acid and 2-ethyl-1-hexanol on ester yield, the initial forward esterification reaction and the reverse reaction rates have been investigated. The experimental results show that the esterification reaction proceeds with a Ping-Pong Bi-Bi mechanism and that 2-ethylhexanoic acid inhibits the reaction.Kinetic parameters were calculated based on this model as follows: Rmax = 37.59 mmol h−1 g−1, KmAl = 1.51 M, KmAc = 0.78 M, KiAc = 1.55 M. The calculated parameters were used to estimate the theoretical initial reaction rate. The calculated initial reaction rates from kinetic parameters for concentrations of less than 0.1 M 2-ethylhexanoic acid show good agreements with the experimental data.

Keywords
Esterification; Novozym 435; Ping-Pong mechanism; Bi-Bi mechanism; Kinetic; 2-Ethylhexanoic acid
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Synthesis of 2-ethylhexyl-2-ethylhexanoate catalyzed by immobilized lipase in n-hexane: A kinetic study
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 37, Issue 3, 15 December 2007, Pages 279–284
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us