Acoustic cavitation assisted lipase B catalysed synthesis of polyethylene glycol stearate in a solvent free system via esterification: synthesis and optimization

2019 ◽  
Vol 94 (8) ◽  
pp. 2465-2474 ◽  
Author(s):  
Girish S Nhivekar ◽  
Virendra K Rathod
Keyword(s):  
Polyethylene Glycol ◽  
Acoustic Cavitation ◽  
Solvent Free ◽  
Lipase B ◽  
Free System ◽  
Solvent Free System

scholarly journals Optimization of lipase-catalyzed synthesis of polyethylene glycol stearate in a solvent-free system

2019 ◽  
Vol 8 (1) ◽  
pp. 30-37 ◽  
Author(s):  
Girish S. Nhivekar ◽  
Virendra K. Rathod
Keyword(s):  
Polyethylene Glycol ◽  
Molecular Sieves ◽  
Immobilized Lipase ◽  
Solvent Free ◽  
Molar Ratio ◽  
Resonance Spectroscopy ◽  
Free System ◽  
Immobilized Catalyst ◽  
Solvent Free System ◽  
The Impact

Abstract Polyethylene glycol stearate is widely used in pharmaceuticals and cosmetic industries. The current work describes the synthesis and optimization of polyethylene glycol stearate by esterification of polyethylene glycol 600 and stearic acid using Fermase CALBex 10000, a commercial immobilized lipase B in a solvent-free system. The impact of various parameters that include temperature, reaction time, biocatalyst loading, agitation, acid to alcohol molar ratio, and amount of molecular sieves was optimized to achieve maximum conversion. The highest conversion of 86.98% was obtained in 6 h under the following optimized conditions: temperature 70°C, biocatalyst loading 0.5%, acid to alcohol molar ratio 1:4, speed of agitation 300 rpm, and molecular sieves 5% (w/w). The final condensate product was analyzed through Fourier transform infrared spectroscopy to confirm the functional group and also by 1H nuclear magnetic resonance spectroscopy. The immobilized catalyst can be reused up to four cycles, exhibiting more than 60% of its initial activity.

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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