Production of flavour esters by immobilized Staphylococcus simulans lipase in a solvent-free system

2006 ◽  
Vol 41 (7) ◽  
pp. 1692-1698 ◽  
Author(s):  
Maha Karra-Châabouni ◽  
Hanen Ghamgui ◽  
Sofiane Bezzine ◽  
Ahmed Rekik ◽  
Youssef Gargouri
Keyword(s):  
Solvent Free ◽  
Free System ◽  
Solvent Free System ◽  
Staphylococcus Simulans ◽  
Flavour Esters

Production of isoamyl acetate with immobilized Staphylococcus simulans lipase in a solvent-free system

2006 ◽  
Vol 38 (6) ◽  
pp. 788-794 ◽  
Author(s):  
Hanen Ghamgui ◽  
Maha Karra-Chaâbouni ◽  
Sofiane Bezzine ◽  
Nabil Miled ◽  
Youssef Gargouri
Keyword(s):  
Isoamyl Acetate ◽  
Solvent Free ◽  
Free System ◽  
Solvent Free System ◽  
Staphylococcus Simulans

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.

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

scholarly journals Solvent-free hydrogenation of cyclohexene over Rh-TUD-1 at ambient conditions

RSC Advances ◽  
2018 ◽  
Vol 8 (60) ◽  
pp. 34370-34373 ◽  
Author(s):  
Mhamed Benaissa ◽  
Abdullah M. Alhanash ◽  
Ahmed T. Mubarak ◽  
Morad Eissa ◽  
Taher Sahlabji ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Room Temperature ◽  
Hydrogenation Reaction ◽  
Solvent Free ◽  
Ambient Conditions ◽  
Total Conversion ◽  
Free System ◽  
Liquid Phase Hydrogenation ◽  
System P ◽  
Solvent Free System

Total conversion of cyclohexene to cyclohexane was achieved in a liquid phase hydrogenation reaction at room temperature, 1 atm H2 pressure and solvent-free system.

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