scroll to top
Press enter or spacebar to select a desired language.
Press enter or spacebar to select a desired language.
Your source for trusted research content

EBSCO Auth Banner

Let's find your institution. Click here.

Limonene oxidation by molecular oxygen under solvent-free conditions: the influence of peroxides and catalysts on the reaction rate.

  • Academic Journal
  • Reaction Kinetics, Mechanisms & Catalysis; Dec2012, Vol. 107 Issue 2, p263-275, 13p
  • Liquid-phase oxidation of limonene was performed with molecular oxygen as the sole oxidizing agent under non-solvent conditions. The oxidation took place under atmospheric pressure and temperatures between 70 and 90 °C in the presence of three different nickel-aluminium hydrotalcites. The final limonene conversion at 80 °C and 6 h of reaction time was comprised between 40 and 50 %. Several oxygenated limonene derivatives such as endo- and exo-epoxides, carveol and carvone represent 45-60 % of the whole amount of products. In the absence of a catalyst, a higher initial content of peroxides in limonene lead to a higher reaction rate with no significant changes in product selectivities. Thermal decomposition of limonene peroxides took place as the initiation path of an autooxidation mechanism leading to the different products. The catalyst played an important role in the initial paths involving activation of both reactants as well as in the decomposition of limonene peroxide to form radicals. [ABSTRACT FROM AUTHOR]
Additional Information
Copyright of Reaction Kinetics, Mechanisms & Catalysis is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)