Acetylation of Eugenol over 12-Molybdophosphoric Acid Anchored in Mesoporous Silicate Support Synthesized from Flint Kaolin
| Autor: | Carlos E.F. da Costa, Alex de Nazaré de Oliveira, Geraldo Narciso da Rocha Filho, Erika Tallyta Leite Lima, Rômulo Simões Angélica, Deborah Terra de Oliveira, Rafael Luque, Fabíola Fernandes Costa, Luís Adriano Santos do Nascimento, Eloisa Helena A. Andrade |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Flint kaolin
Kinetics 02 engineering and technology Heterogeneous catalysis lcsh:Technology 01 natural sciences Article Catalysis chemistry.chemical_compound Aluminosilicate eugenyl acetate General Materials Science Eugenyl acetate flint kaolin lcsh:Microscopy lcsh:QC120-168.85 acetylation lcsh:QH201-278.5 lcsh:T 010405 organic chemistry Acetylation 021001 nanoscience & nanotechnology 0104 chemical sciences Eugenol Acetic anhydride heterogeneous catalysis chemistry lcsh:TA1-2040 12-molybdophosphoric acid AlSiM lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Mesoporous material lcsh:TK1-9971 Mesoporous silicate Nuclear chemistry |
| Zdroj: | Materials Materials 12(18), 2995 (2019) Helvia. Repositorio Institucional de la Universidad de Córdoba instname Materials, Vol 12, Iss 18, p 2995 (2019) Volume 12 Issue 18 |
| ISSN: | 1996-1944 |
| Popis: | A new prepared catalyst, 12-molybdophosphoric acid (HPMo) anchored to the mesoporous aluminosilicate AlSiM, synthesized from Amazon kaolin, was characterized and used as a heterogeneous acid catalyst for the production of eugenyl acetate by acetylation of eugenol with acetic anhydride. The effect of various reaction parameters, such as catalyst concentration, eugenol/acetic anhydride molar ratio, temperature and reaction time, was studied to optimize the conditions of maximum conversion of eugenol. The kinetics studies showed that in eugenol acetylation, the substrate concentration follows a first order kinetics. The results of activation energy was 19.96 kJ mol&minus 1 for HPMo anchored to AlSiM. The reuse of the catalyst was also studied and there was no loss of catalytic activity after four cycles of use (from 99.9% in the first cycle to 90% in the fifth cycle was confirmed), and an excellent stability of the material was observed. Based on catalytic and kinetic studies, HPMo anchored to AlSiM is considered an excellent catalyst. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |