Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/13056
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Ethylbenzene Oxidation to its Hydroperoxide in the presence of N Hydroxyimides and Minute Amounts of Sodium Hydroxide

AuthorsToribio Temprado, Pedro Pablo; Gimeno-Gargallo, Ana; Capel Sánchez, María del Carmen; Frutos Escrig, Pilar de; Campos Martín, José Miguel CSIC ORCID ; García Fierro, José Luis CSIC ORCID
KeywordsAutoxidation
Organocatalysis
Homogeneous catalysis
Sodium Hydroxide
Hydrocarbons
NHPI
Issue Date14-May-2009
SeriesApplied Catalysis A, General
APCATA 11992
AbstractN-hydroxyimides of the type N-hydroxyphthalimide (NHPI), N-hydroxysuccinimide (NHSI), N-hydroxymaleinimide (NHMI) and N-hydroxynaphthalimide (NHNI) were used in ethylbenzene oxidation with air under soft reaction conditions. The ethylbenzene conversion profile was found to increase almost linearly with time, and the rate of ethylbenzene conversion was the highest in the presence of NHNI. Nevertheless, the selectivity reached in all cases is still far from the values required for industrial application. On the other hand, the hydroperoxide yield increased dramatically with the addition of minute amounts of sodium hydroxide to the reaction mixture. It is worth noting that this increase can be associated to an enhancement in the selectivity to hydroperoxide because, in fact, ethylbenzene conversion slightly decreased with the addition of sodium. Indeed, this behavior is puzzling, because the amount of sodium is very small regarding ethylbenzene (0.005 mol %) and yet its effect is enormous. Finally, a tenfold increase in the concentration of N-hydroxyimide yielded only a slight increase in ethylbenzene conversion, but no improvement in hydroperoxide concentration. This behavior is related to the participation of >NO• radicals in the formation of by-products (alcohols and ketones) from hydroperoxide. Up to date, the combination of NHPI and NaOH produces the highest hydroperoxide yield reported.
Publisher version (URL)http://dx.doi.org/doi:10.1016/j.apcata.2009.04.023
URIhttp://hdl.handle.net/10261/13056
DOI10.1016/j.apcata.2009.04.023
Appears in Collections:(ICP) Artículos

Files in This Item:
File Description SizeFormat
Acepted Manuscript.pdf638,56 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work

SCOPUSTM   
Citations

36
checked on May 12, 2022

WEB OF SCIENCETM
Citations

33
checked on May 15, 2022

Page view(s)

401
checked on May 16, 2022

Download(s)

288
checked on May 16, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.