Lookup NU author(s): Abdul Rehman,
Professor Adam Harvey
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Royal Society of Chemistry, 2018.
For re-use rights please refer to the publisher's terms and conditions.
© 2018 The Royal Society of Chemistry. The development of a limonene epoxidation process using environment-friendly H2O2, with high H2O2 conversion (∼95%) and selectivity to the epoxide (100%), is reported in this paper. Parametric studies of temperature, oxidant, solvent, acid concentration and sodium sulphate amounts were performed with the focus on establishing a rapid and highly selective process. Approximately 95% conversion of H2O2 at 100% selectivity to limonene-1,2-epoxide was achieved in 15 minutes with a single-step addition of oxidant. The operating conditions included a 323 K temperature in a solvent-free environment, with a limonene/H2O2/catalyst molar ratio of 4:1:0.005, using a tungsten-based polyoxometalates. To prevent the hydrolysis of the epoxide, the reaction mixture was saturated with sodium sulphate. An acid concentration of lower than 0.04 M was used and found to have significant effect on the selectivity. Kinetic studies were performed to allow modelling of the reaction scheme. The activation energy was determined to be ∼36 kJ mol-1.
Author(s): Resul MFMG, Lopez Fernandez AM, Rehman A, Harvey AP
Publication type: Article
Publication status: Published
Journal: Reaction Chemistry and Engineering
Online publication date: 08/08/2018
Acceptance date: 02/08/2018
Date deposited: 29/10/2018
ISSN (electronic): 2058-9883
Publisher: Royal Society of Chemistry
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