Enzymatic synthesis of fatty esters

García, Tomás Gallardo; Sánchez, Nieves Núñez; Martı́nez, Mercedes; Aracil, José

doi:10.1016/s0141-0229(99)00082-4

Cited by 73 publications

(36 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results indicate a sharp increase in conversion initially, but an excess of alcohol does not reduce the conversion. This is in contrast to the study that shows as inhibitory effect of alcohol for the synthesis of esters in presence of ethanol (7,20,21), geraniol (22), and isopropyl alcohol (8). The results are consistent with the results for reaction of various acids with isoamyl alcohol (23) and alcoholysis of methylmethacrylate (12).…”

Section: Resultssupporting

confidence: 85%

See 1 more Smart Citation

Synthesis of isoamyl laurate and isoamyl stearate in supercritical carbon dioxide

Varma

Madras

2007

Appl Biochem Biotechnol

View full text Add to dashboard Cite

The synthesis of isoamyl laurate and isoamyl stearate was studied in supercritical carbon dioxide with three lipases, Novozym 435, Lipolase 100T, and Candida rugosa. The maximum conversion of 37% and 53%, respectively for isoamyl laurate and isoamyl stearate was obtained when Novozym 435 was used. The effect of various parameters such as molar ratio of alcohol to acid, presence of water, time and temperature was investigated. An optimum temperature of 40-45 degrees C was observed for all reactions. The kinetics of reactions was fast and equilibrium was achieved in 2-3 h. Although the presence of excess alcohol did not reduce conversion, excess water reduced conversion significantly.

show abstract

Section: Resultssupporting

confidence: 85%

“…Lipases (triacylglycerol hydrolases, E.C. 3.1.1.3) have been used for hydrolysis, esterification, and transesterification in absence of solvents (5)(6)(7) in organic solvents (8)(9)(10) and in supercritical fluids (11)(12). Enzymatic reactions are conducted in organic solvents and are heterogeneous (13) and are diffusion-controlled (14).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of isoamyl laurate and isoamyl stearate in supercritical carbon dioxide

Varma

Madras

2007

Appl Biochem Biotechnol

View full text Add to dashboard Cite

show abstract

“…The temperature was set at 40 • C, 45 • C, 50 • C, 55 • C, and 60 • C, while other hydrolysis variables were set as pH 6.0, time 3 h and enzymatic concentration 150 U/g. From 40 • C to 50 • C, intrinsic viscosity of the products decreased, which was contrary to the trend from 50 • C to 60 • C. Generally, the reaction rate increases with temperature while the stability of the enzymes declines, and at high temperature, catalytic activity will be lost rapidly before significant conversion is reached (Garcia, Sanchez, Martinez, & Aracil, 1999;Foresti & Ferreira, 2007). Temperature may affect the hydrolysis efficiency in a positive way or vice versa.…”

Section: Effect Of Temperature On Kg Hydrolysismentioning

confidence: 85%

Preparation, composition analysis and antioxidant activities of konjac oligo-glucomannan

Liu

Zhang

et al. 2015

Carbohydrate Polymers

View full text Add to dashboard Cite

“…Activated molecular sieves or salt hydrates can be added to the system to remove water produced by esterification 6 . The kinetics of palmitic acid esterification catalyzed catalyst concentration 2.2-7.83 wt by immobilized lipase Candida antarctica Novozyme 435 showed 70 reaction in 120 min at 65-75 7 . Similarly results were obtained for synthesis of 2-ethylhexyl palmitate and lauryl palmitate 8,9 .…”

Section: Introductionmentioning

confidence: 99%