1-Butyl oleate synthesis by immobilized lipase from Rhizopus oryzae: a comparative study between n-hexane and solvent-free system

2004 ◽  
Vol 35 (4) ◽  
pp. 355-363 ◽  
Author(s):  
Hanen Ghamgui ◽  
Maha Karra-Chaâbouni ◽  
Youssef Gargouri
Keyword(s):  
Comparative Study ◽  
Rhizopus Oryzae ◽  
Immobilized Lipase ◽  
Solvent Free ◽  
Butyl Oleate ◽  
Free System ◽  
Solvent Free System

Synthesis and component confirmation of biodiesel from palm oil and dimethyl carbonate catalyzed by immobilized-lipase in solvent-free system

Fuel ◽  
2010 ◽  
Vol 89 (12) ◽  
pp. 3960-3965 ◽  
Author(s):  
Liping Zhang ◽  
Shuzhen Sun ◽  
Zhong Xin ◽  
Boyang Sheng ◽  
Qun Liu
Keyword(s):  
Palm Oil ◽  
Dimethyl Carbonate ◽  
Immobilized Lipase ◽  
Solvent Free ◽  
Free System ◽  
Solvent Free System

Immobilized recombinant Rhizopus oryzae lipase for the production of biodiesel in solvent free system

2010 ◽  
Vol 67 (1-2) ◽  
pp. 45-51 ◽  
Author(s):  
You-dong Wang ◽  
Xiao-yong Shen ◽  
Zhi-lin Li ◽  
Xun Li ◽  
Fei Wang ◽  
...  
Keyword(s):  
Rhizopus Oryzae ◽  
Solvent Free ◽  
Rhizopus Oryzae Lipase ◽  
Free System ◽  
Solvent Free System

A mixed-function-grafted magnetic mesoporous hollow silica microsphere immobilized lipase strategy for ultrafast transesterification in a solvent-free system

RSC Advances ◽  
2015 ◽  
Vol 5 (54) ◽  
pp. 43074-43080 ◽  
Author(s):  
Mingming Zheng ◽  
Lijing Mao ◽  
Fenghong Huang ◽  
Xia Xiang ◽  
Qianchun Deng ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Immobilized Lipase ◽  
Solvent Free ◽  
Silica Microspheres ◽  
Silica Microsphere ◽  
Free System ◽  
Hollow Silica ◽  
System P ◽  
Solvent Free System

A novel magnetic mesoporous hollow silica microspheres immobilized lipase is described for ultrafast transesterification of phytosterol with fatty acids and triglycerides in a solvent-free system.

scholarly journals Optimization of lipase-catalyzed synthesis of flavour esters in solvent free system

2014 ◽  
Vol 6 (1) ◽  
Author(s):  
Syamsul Kamar Muhamad ◽  
Salina Mat Radzi ◽  
Siti Salhah Othman ◽  
Mohd Basyaruddin Abdul Rahman ◽  
Hanina Mohd Noor
Keyword(s):  
Reaction Time ◽  
Chain Length ◽  
Reaction Temperature ◽  
Immobilized Lipase ◽  
Solvent Free ◽  
Esterification Reaction ◽  
Reaction Parameters ◽  
Free System ◽  
Solvent Free System ◽  
Flavour Esters

The effects of important reaction parameters for enhancing flavour esters formation through lipase-catalyzed reaction were investigated in this study.Various commercial immobilized lipases were used to catalyze the esterification reaction between short-chain fatty acids and alcohols to produce flavour esters which are nonyl caprylate and ethyl valerate which differ in chain length of esters. These synthetic flavour esters with fruity notes are widely used in food, cosmetic and pharmaceutical industries. The effect of various reaction parameters was optimized to obtain a high yield of flavour esters. A maximum percentage for nonyl caprylate with conversion of flavour esters more than 90 % in a solvent-free system was successfully obtained under the following conditions: reaction time (RT), 5 hours; reaction temperature, 40 °C; amount of immobilized lipase, 25 % w/w of total substrate and shaking speed 200 rpm. Compared to ethyl valerate, a maximum percentage conversion of flavour ester more than 80 % in solvent free system was successfully obtained under following conditions: reaction time (RT), 45 minutes; reaction temperature, 40 °C; amount of immobilized lipase, 15 % w/w of total substrate and shaking speed 200 rpm. Comparison between these two ester showed that the chain length give an effect to optimize the reaction condition in esterification reaction.

scholarly journals The mechanism of lipase-catalyzed synthesis of food flavoring ethyl butyrate in a solvent-free system

2019 ◽  
pp. 1-7
Author(s):  
Emmanuel M. Papamichael ◽  
Athanasios Foukis ◽  
Emmanuel M. Papamichael ◽  
Olga A. Gkini ◽  
Panagiota-Yiolanda Stergiou
Keyword(s):  
Immobilized Lipase ◽  
Kinetic Mechanism ◽  
Solvent Free ◽  
Ethyl Butyrate ◽  
Free System ◽  
Dead End ◽  
Synthetic Procedure ◽  
Solvent Free System ◽  
Anhydrous Solvent

Immobilized Lipase-B from Candida antarctica catalyzed the esterification of butyric acid and ethanol under anhydrous solvent-free reaction conditions toward the synthesis of ethyl butyrate, a compound significant as food and perfume flavoring, as well as biofuel. The proton inventory technique was efficiently applied in mixtures of the anhydrous polar solvents ethanol and deuterated ethanol (CH3CH2OD). Subsequently, and by suitable analysis of the experimental data, the aforementioned synthetic procedure seems likely to follow the kinetic mechanism ordered bi-bi involving single substrate dead-end inhibition by ethanol, whereas were estimated values of important parameters. So far is the first experimental evidence that the synthesis of ethyl butyrate, which is catalyzed by immobilized lipase, it follows an entirely different mechanism when it is performed in anhydrous solvent-free system vs. that in anhydrous n-hexane; then it may be constructive for the industrial production of fixed quality of ethyl butyrate.

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