Vapor phase acylation of guaiacol with acetic acid over micro, nano and hierarchical MFI and BEA zeolites

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10438541" target="_blank" >RIV/00216208:11310/21:10438541 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=jxKKW6M5To" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=jxKKW6M5To</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apcatb.2020.119826" target="_blank" >10.1016/j.apcatb.2020.119826</a>

Result language
angličtina
Original language name
Vapor phase acylation of guaiacol with acetic acid over micro, nano and hierarchical MFI and BEA zeolites
Original language description
Vapor phase acylation of guaiacol with acetic acid was explored over a series of micro, nanocrystalline, and hierarchical MFI and BEA zeolites with different acidic and textural properties using a continuous flow reactor. The main products formed over these zeolites were i) guaiacol acetate, which is produced via O-acylation; ii) Hydroxymethoxyacetophenones (HMAPs), which are of pharmaceutical interest and mainly formed by C-acylation of guaiacol and to lesser extent by Fries rearrangement of guaiacol acetate and iii) catechol, which derives from the demethylation/demethoxylation of guaiacol. Both microcrystalline zeolites activity was poor because of the steric/diffusion limitation. Nanocrystalline and hierarchical MFI zeolites with improved accessibility and optimised acid strength and Lewis/Bronsted acid sites ratio were the most suitable catalysts for the continuous production of HMAPs. Although the guaiacol conversion slightly declines along the time on stream, the HMAPs selectivity and yield are enhanced due to deactivation affecting in higher extent to secondary reactions.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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