Selectivity ofCandidaantarcticaB Lipase toward Fatty Acid and (Iso)propanol Substrates in Esterification Reactions in Organic Media

2000 ◽  
Vol 48 (8) ◽  
pp. 3738-3743 ◽  
Author(s):  
Jad Arsan ◽  
Kirk L. Parkin
Keyword(s):  
Fatty Acid ◽  
Organic Media ◽  
Esterification Reactions

scholarly journals Synthesis of Fatty Acid Methyl Esters from Pomace Oil Catalyzed by Zinc Stearate: A Kinetic Study of the Transesterification and Esterification Reactions

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 978 ◽  
Author(s):  
Mariana Soledad Alvarez Serafini ◽  
Gabriela Marta Tonetto
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Equilibrium Constants ◽  
Catalyst System ◽  
Zinc Stearate ◽  
Operating Conditions ◽  
Crystalline Solid ◽  
Acid Methyl ◽  
Esterification Reactions

In this work, the simultaneous transesterification and esterification reactions of olive pomace oil with methanol catalyzed by zinc stearate were studied. This catalyst is a crystalline solid at room temperature, but it is soluble in the reaction medium at reaction temperature. Zinc stearate has surfactant properties that cause the formation of an emulsion in the reaction system. The stability of the emulsion formed in the oil–methanol–catalyst system was compared to that in the FAME (fatty acid methyl esters)–methanol–catalyst system. It was observed that the emulsion formed in the presence of high amounts of FAME is much more unstable, which makes the catalyst easy to separate from the reaction products. The kinetics of esterification and transesterification were also studied. All the kinetic and equilibrium constants were determined with a complete model, considering the three stepwise reactions corresponding to the transesterification of triglycerides and the esterification of free fatty acids. The parameters obtained were used to model the operating conditions that would allow obtaining biodiesel that meets the quality standards.

scholarly journals Enzymatic Functions of Fatty Acid-modified Chymotrypsin and Trypsin in Aqueous-organic Media

1994 ◽  
Vol 58 (3) ◽  
pp. 512-516 ◽  
Author(s):  
Yoshihiro Kawasaki ◽  
Yoshinori Takahashi ◽  
Masaru Nakatani ◽  
Mototake Murakami ◽  
Shun’ichi Dosako ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Organic Media

scholarly journals Performance of Different Immobilized Lipases in the Syntheses of Short- and Long-Chain Carboxylic Acid Esters by Esterification Reactions in Organic Media

Molecules ◽  
2018 ◽  
Vol 23 (4) ◽  
pp. 766 ◽  
Author(s):  
Lionete de Lima ◽  
Adriano Mendes ◽  
Roberto Fernandez-Lafuente ◽  
Paulo Tardioli ◽  
Raquel Giordano
Keyword(s):  
Carboxylic Acid ◽  
Organic Media ◽  
Immobilized Lipases ◽  
Esterification Reactions ◽  
Acid Esters ◽  
Long Chain

scholarly journals Organic Solvent Tolerant Lipases and Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Shivika Sharma ◽  
Shamsher S. Kanwar
Keyword(s):  
Organic Solvent ◽  
Immobilized Lipase ◽  
Industrial Applications ◽  
Fatty Acid Esters ◽  
Reverse Direction ◽  
Organic Media ◽  
Two Phase ◽  
Organic Solvent Tolerant ◽  
Solvent Tolerant ◽  
Esterification Reactions

Lipases are a group of enzymes naturally endowed with the property of performing reactions in aqueous as well as organic solvents. The esterification reactions using lipase(s) could be performed in water-restricted organic media as organic solvent(s) not only improve(s) the solubility of substrate and reactant in reaction mixture but also permit(s) the reaction in the reverse direction, and often it is easy to recover the product in organic phase in two-phase equilibrium systems. The use of organic solvent tolerant lipase in organic media has exhibited many advantages: increased activity and stability, regiospecificity and stereoselectivity, higher solubility of substrate, ease of products recovery, and ability to shift the reaction equilibrium toward synthetic direction. Therefore the search for organic solvent tolerant enzymes has been an extensive area of research. A variety of fatty acid esters are now being produced commercially using immobilized lipase in nonaqueous solvents. This review describes the organic tolerance and industrial application of lipases. The main emphasis is to study the nature of organic solvent tolerant lipases. Also, the potential industrial applications that make lipases the biocatalysts of choice for the present and future have been presented.

Intensification of waste cooking oil transformation by transesterification and esterification reactions in oscillatory baffled and microstructured reactors for biodiesel production

2014 ◽  
Vol 3 (6) ◽  
Author(s):  
Alex Mazubert ◽  
Joelle Aubin ◽  
Sébastien Elgue ◽  
Martine Poux
Keyword(s):  
Fatty Acid ◽  
Acid Methyl Ester ◽  
Waste Cooking Oil ◽  
Biodiesel Production ◽  
Cooking Oil ◽  
Acid Methyl ◽  
Waste Cooking Oils ◽  
Microstructured Reactors ◽  
Esterification Reactions ◽  
Cooking Oils

AbstractThe transformation of waste cooking oils for fatty acid methyl ester production is investigated in two intensified technologies: microstructured Corning

Enzymatic Peptide Synthesis with Fatty Acid-modified Chymotrypsin and Trypsin in Aqueous-organic Media

1994 ◽  
Vol 58 (6) ◽  
pp. 1162-1163 ◽  
Author(s):  
Yoshihiro Kawasaki ◽  
Yoshinori Takahashi ◽  
Masaru Nakatani ◽  
Mototake Murakami ◽  
Shun’ichi Dosako ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Peptide Synthesis ◽  
Organic Media ◽  
Enzymatic Peptide Synthesis
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