Effect of Phosphorus Precursor, Reduction Temperature, and Support on the Catalytic Properties of Nickel Phosphide Catalysts in Continuous-Flow Reductive Amination of Ethyl Levulinate

Yazhou Wang, Alexey L. Nuzhdin, Ivan V. Shamanaev, Evgeny G. Kodenev, Evgeny Yu Gerasimov, Marina V. Bukhtiyarova, Galina A. Bukhtiyarova

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

Levulinic acid and its esters (e.g., ethyl levulinate, EL) are platform chemicals derived from biomass feedstocks that can be converted to a variety of valuable compounds. Reductive amination of levulinates with primary amines and H2 over heterogeneous catalysts is an attractive method for the synthesis of N-alkyl-5-methyl-2-pyrrolidones, which are an environmentally friendly alternative to the common solvent N-methyl-2-pyrrolidone (NMP). In the present work, the catalytic properties of the different nickel phosphide catalysts supported on SiO2 and Al2 O3 were studied in a reductive amination of EL with n-hexylamine to N-hexyl-5-methyl-2-pyrrolidone (HMP) in a flow reactor. The influence of the phosphorus precursor, reduction temperature, reactant ratio, and addition of acidic diluters on the catalyst performance was investigated. The Ni2 P/SiO2 catalyst prepared using (NH4 )2 HPO4 and reduced at 600 C provides the highest HMP yield, which reaches 98%. Although the presence of acid sites and a sufficient hydrogenating ability are important factors determining the pyrrolidone yield, the selectivity also depends on the specific features of EL adsorption on active catalytic sites.

Язык оригиналаанглийский
Номер статьи1106
ЖурналInternational Journal of Molecular Sciences
Том23
Номер выпуска3
DOI
СостояниеОпубликовано - 1 февр. 2022

Предметные области OECD FOS+WOS

  • 2.04 ХИМИЧЕСКИЕ ТЕХНОЛОГИИ
  • 1.04 ХИМИЧЕСКИЕ НАУКИ
  • 1.06 БИОЛОГИЧЕСКИЕ НАУКИ

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