Mesoporous Methyl-Functionalized Sn-Silicates Generated
by the Aerosol Process for the Sustainable Production of Ethyl Lactate
Version 2 2018-10-19, 20:48
Version 1 2018-10-19, 16:18
Posted on 2018-10-19 - 20:48
The
aerosol-assisted sol–gel process was used to synthesize
in a straightforward one-pot procedure a series of methyl-functionalized
tin silicates with different degrees of methylation. The successful
incorporation of isolated Sn as single site within the silica framework
was confirmed via 119Sn solid-state NMR measurements, while 29Si and 13C solid-state magic-angle-spinning NMR
experiments revealed a degree of methylation close to the theoretical
value, hence proving the efficacy of the adopted cosynthetic approach.
These materials were tested as catalysts in the synthesis of ethyl
lactate from dihydroxyacetone and ethanol. The methylated solids display
enhanced performances in terms of both activity and selectivity compared
to the nonmethylated analogues, highlighting a strong beneficial role
of surface hydrophobicity. Under proper conditions a total conversion
and a selectivity higher than 95% were achieved. Moreover, the efficient
separation and reuse of the heterogeneous catalyst as well as the
possibility of an easily recover of the reaction solvent result in
a very low waste production protocol with an exceptionally low E-factor.
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Vivian, Alvise; Fusaro, Luca; Debecker, Damien P.; Aprile, Carmela (2018). Mesoporous Methyl-Functionalized Sn-Silicates Generated
by the Aerosol Process for the Sustainable Production of Ethyl Lactate. ACS Publications. Collection. https://doi.org/10.1021/acssuschemeng.8b02623
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AUTHORS (4)
AV
Alvise Vivian
LF
Luca Fusaro
DD
Damien P. Debecker
CA
Carmela Aprile
KEYWORDS
nonmethylated analogues119 SnEthyl Lactate13 Cmaterialmagic-angle-spinning NMR experimentsmethylated solids displaytermseriesselectivitymethyl-functionalized tin silicatessurface hydrophobicityAerosol Processethyl lactateethanolSustainable Productionmethylationwaste production protocolaerosol-assistedone-pot procedureseparationE-factordihydroxyacetone29 SisynthesisefficacyincorporationcatalystMesoporous Methyl-Functionalized Sn-Silicates Generatedcosynthetic approachsiteconversionroleperformanceNMR measurementssilica framework