3687-46-5Relevant articles and documents
Chemically Modified Lipase from Thermomyces lanuginosus with Enhanced Esterification and Transesterification Activities
Noro, Jennifer,Cavaco-Paulo, Artur,Silva, Carla
, p. 4524 - 4531 (2021/09/02)
Lipase from Thermomyces lanuginosus is one of the most explored enzymes for the esterification of several added-value industrial compounds, such as biodiesel, fragrances, and flavors. Its selectivity in these reactions is mostly related with its activity towards small alcohols. In this work, the impact of the chemical modification, with 4 dodecyl chains at its surface, was evaluated regarding its transesterification and esterification activities, comparing with the native form. Linear size-differentiated alcohols (from 1 to 20 carbons in the aliphatic chain) were used to explore for the first time the effect of the chain length in both transesterification and esterification reactions, using p-nitrophenyl palmitate and oleic acid as model compounds, respectively. The chemically modified lipase showed an outstanding improvement of its catalytic performance than the native enzyme, being this increase directly proportional to the size of the alcohols chain used as substrates. The enormous potential and remarkable versatility of this novel super catalyst was here demonstrated, where diverse types of esters, differing in their potential applications (biodiesel, cosmetics, fine chemistry), were efficiently synthesized. The produced esters were fully characterized by 1H NMR, GC-MS, and FTIR.
Synthesis of fatty monoester lubricant base oil catalyzed by Fe-Zn double-metal cyanide complex
Raut, Ravindra K,Shaikh, Mehejabeen,Darbha, Srinivas
, p. 997 - 1003 (2014/11/08)
Fatty monoester lubricant base oils as high as 96.7 mol% were prepared by reacting methyl oleate with long-chain alcohols viz., 2-ethyl-1-hexanol (C 8-OH), 1-decanol (C10OH) and 1-dodecanol (C 12OH) in the presence of a solid Fe-Zn double-metal cyanide (DMC) complex catalyst. Unlike many other acid catalysts, DMC doesn't produce undesired ether side products. The catalyst was reusable in four recycling experiments with little loss in catalytic activity and ester yield. The long-chain esters prepared in the study have the desired physical properties for their application as lubricant base oils.
Influence du gonflement sur l'activite catalytique de solides resines echangeuses d'ions et enzymes insolubles
Boyer, Jean-Louis,Gilot, Bernard,Guiraud, Roland
, p. 260 - 263 (2007/10/02)
Some solid catalysts swell in the reactional medium (ion exchange resins, solid enzymes).The kinetic effect of swelling is shown by examples in esterification and hydrolysis reactions.