transesterification, one of the most effective methods for ester synthesis, is usually conducted under acid or basicconditions. although quite a few methods have been reported for transesterification, they are not general as far asp-ketoesters are concerned. some of these methods used toxic, expensive reagents and in relatives large amount. inthis research, transesterification reaction six type...

Erucic acid (EA), a fatty acid of 22-carbon chain with one isolated double bond, has broad industrial applications. Currently, erucic acid is isolated from Crucifereae plant oils through steam splitting, namely the Colgate-Emery process, followed by fractional distillation. This two-step process involves drastic conditions, low energy efficiency, and extensive product degradation. Enzymatic app...

The enzymatic preparation of biodiesel has been hampered by the lack of suitable solvents with desirable properties such as high lipase compatibility, low cost, low viscosity, high biodegradability, and ease of product separation. Recent interest in using ionic liquids (ILs) as advanced reaction media has led to fast reaction rates and high yields in the enzymatic synthesis of biodiesel. Howeve...

Introduction The possibility of using vegetable oils as fuel has been documented in the beginning of diesel engines. Biodiesel produced from waste oil by trans-esterification process can be used as a substitute for diesel in internal combustion engines [1]. Biodiesel can be produced by the transesterifcation of vegetable oils [2] such as soyabean oil, rapeseed oil, sunflower oil etc. [3]. Trans...

Background The production of fuels and chemicals from renewable resources is increasingly important due to the environmental concern and depletion of fossil fuel. Despite the fast technical development in the production of aviation fuels, there are still several shortcomings such as a high cost of raw materials, a low yield of aviation fuels, and poor process techno-economic consideration. In r...

CURRENT SCIENCE, VOL. 85, NO. 12, 25 DECEMBER 2003 1693 *For correspondence. (e-mail: [email protected]) 64. Iso, M., Chen, B., Eguchi, M., Kudo, T. and Shreshtha, S., Production of biodiesel fuel from triglycerides and alcohol using immobilized lipase. J. Mol. Catal. B, Enzymes, 2001, 16, 53–58. 65. Nakanishi, K. and Matsuno, R., Continuous peptide synthesis in a water-immiscible o...

The enzymatic transesterification of docosahexaenoic acid (DHA) ethyl ester with glycerol was performed with several lipases in a solvent-free system and it involves the initial formation of sn-2 docosahexaenyl monoacylglyceride. This DHA derivative is highly relevant for improving the bioavailability of DHA and it has received increasing interest in the field of nutrition. Three commercial lip...