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Salts of N-heterocyclic compounds as catalysts in cyclic carbonates production

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43925221" target="_blank" >RIV/60461373:22310/22:43925221 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Salts of N-heterocyclic compounds as catalysts in cyclic carbonates production

  • Original language description

    Cyclic carbonates are widely used as aprotic solvents, electrolytes in lithium batteries, intermediates for the production of fine chemicals, and precursors for the production of polymers. The preparation of cyclic carbonate via cycloaddition of carbon dioxide and epoxide has promoted interest due to the economic and environmental benefits. This type of reaction usually requires a suitable catalyst to achieve high yields of cyclic carbonates under mild conditions. Thus, our work was focused on new heterogeneous catalysts based on salts of N-heterocyclic compounds. The catalysts were prepared in two steps: first, the modification of support material, MCM-41, by halogenopropyl trimethoxysilane was performed, followed by the reaction with N heterocyclic compound (pyridine, quinolone, pyrimidine, 1 methyl imidazole, 1,2,4 triazole, 3 methyl pyrazole, and 8 hydroxy quinoline). Characterization of prepared material confirmed the successful modification of MCM-41 by halide (bromine and iodine), and the presence of N-heterocyclic compound in the salt form. The catalytic activity of prepared materials was verified in a model reaction of carbon dioxide and styrene oxide. The influence of the catalyst structure on its activity was observed. The highest yield of styrene carbonate was reached using MCM 41 supported 1 methyl imidazolium iodide (MCM-I-im) under the following reaction conditions: 120 °C, 1.2 MPa, 12.5 wt.% of MCM I im and toluene as a solvent. The activity of used catalysts decreased in the row: MCM-I-N &gt; MCM-Br-N &gt; MCM-Cl-N. The selectivity to styrene carbonate was almost 100 % in all cases. The possibility of the reuse of catalyst was also investigated. Bromine and iodine based catalysts were successfully reused without significant loss of activity. These materials represent a promising alternative to commercially used catalysts for the production of cyclic carbonates.

  • Czech name

  • Czech description

Classification

  • Type

    O - Miscellaneous

  • CEP classification

  • OECD FORD branch

    10401 - Organic chemistry

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2022

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů