Acetylation of eugenol over 12-molybdophosphoric acid anchored in mesoporous silicate support synthesized from flint kaolin

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-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. © 2019 by the authors.

De Oliveira A.N. , Lima E.T.L.1, 2 , De Oliveira D.T. , Angélica R.S.5 , Andrade E.H.A.1, 6 , Filho G.N.R.1, 2 , Da Costa C.E.F. , Costa F.F.7 , Luque R. 8, 9 , Do Nascimento L.A.S.
Номер выпуска
  • 1 Graduation Program in Chemistry, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém PA, 66075-110, Brazil
  • 2 Laboratory of Oils of the Amazon, Federal University of Pará, Perimetral Avenue, Guamá, Belém PA, 66075-750, Brazil
  • 3 Department of Exact and Technologic Sciences, Federal University of Amapá, Rod. Juscelino Kubitschek, km 02-Jardim Marco Zero, Macapá AP, 68903-419, Brazil
  • 4 Graduation Program in Biotechnology, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém PA, 66075-110, Brazil
  • 5 Laboratory of X-Ray Diffraction, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém PA, 66075-110, Brazil
  • 6 Adolpho Ducke Laboratory, Botany Coordinating, Museu Paraense Emílio Goeldi, Perimetral Avenue, Terra Firme, Belém PA, 66077-830, Brazil
  • 7 Campus of Salinópolis, Federal University of Pará, Salinópolis, Pará, CEP 68721-000, Brazil
  • 8 Faculty of Sciences, Research Institute of Chemistry, Peoples Friendship University of Russia (RUDN University), 6 Miklukho Maklaya str., Moscow, 117198, Russian Federation
  • 9 Department of Organic Chemistry, Universidad de Córdoba, Ctra Nnal IV-A, Km 396, Cordoba, E14014, Spain
Ключевые слова
12-molybdophosphoric acid; Acetylation; AlSiM; Eugenyl acetate; Flint kaolin; Heterogeneous catalysis
Дата создания
Дата изменения
Постоянная ссылка

Другие записи