NDLI: Solvent-free biodiesel epoxidation

Content Provider	Springer Nature Link
Author	Lehnen, Débora R. Guzatto, Rafael Defferrari, Diego Alborz, Louidi L. Samios, Dimitrios
Copyright Year	2013
Abstract	Biodiesel emerged again recently as an alternative for fossil fuels. Besides energy, biodiesel can be used as raw material to synthesize high value products such as epoxides. Indeed, epoxides are versatile intermediates in organic synthesis for numerous reactions due to the high reactivity of the oxirane ring. Actually common epoxidation by peracids in organic solvent can last several hours according to the double bonds number. The solvent confers selectivity to the reaction, preventing di-hydroxylation. Alternatively solvent-free reactions can be done in shorter times, but hydroxylation is less controlled. Here, we set up the synthesis of epoxides from methyl and ethyl esters of waste cooking oil, without solvent or metal catalyst. We tested molar ratio of hydrogen peroxide and formic acid, double bond number, reaction time, and temperature. Results show that the highest epoxide yields and selectivity, with high conversion of the double bonds, were obtained for temperature reactions between 50 and 65 °C, reaction times from 2 to 3 h, and molar ratio of 20/2/1. For those conditions, the double bonds conversion is equal or near 100 %, with epoxide yield and selectivity between 85 and 93 %. Organic solvent suppression, besides being environmentally friendly, also saves reaction time and subsequent purification steps.
Starting Page	335
Ending Page	340
Page Count	6
File Format	PDF
ISSN	16103653
Journal	Environmental Chemistry Letters
Volume Number	12
Issue Number	2
e-ISSN	16103661
Language	English
Publisher	Springer International Publishing
Publisher Date	2013-12-01
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Methyl esters Ethyl esters Biodiesel epoxidation Solvent-free 1H NMR FTIR Environmental Chemistry Ecotoxicology Pollution Analytical Chemistry Geochemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry

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