Comparative Fatty Acid Selectivity of Lipases in Esterification Reactions with Glycerol and Diol Analogues in Organic Media

2000 ◽  
Vol 16 (3) ◽  
pp. 372-377 ◽  
Author(s):  
C.-H. Lee ◽  
K.L. Parkin
Keyword(s):  
Fatty Acid ◽  
Organic Media ◽  
Fatty Acid Selectivity ◽  
Esterification Reactions

scholarly journals Fatty Acid Selectivity of Various Microbial Lipases for Esterification.

1996 ◽  
Vol 45 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Hiroshi YAMASHITA ◽  
Setsuko HARA ◽  
Yoichiro TOTANI
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Selectivity ◽  
Microbial Lipases

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
Sign in / Sign up

Export Citation Format

Share Document