Biocatalytic hydrolysis of di-urethane model compounds in ionic liquid reaction media
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Other documents of the author: Salas, Rebeca; Villa, Rocio; Cano, Sergio; Nieto Cerón, Susana; Garcia-Verdugo, Eduardo; Lozano, Pedro
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comunitat-uji-handle3:10234/8639
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Title
Biocatalytic hydrolysis of di-urethane model compounds in ionic liquid reaction mediaAuthor (s)
Date
2024-01-11Publisher
ElsevierBibliographic citation
SALAS, Rebeca, et al. Biocatalytic hydrolysis of di-urethane model compounds in ionic liquid reaction media. Catalysis Today, 2024, vol. 430, p. 114516.Type
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info:eu-repo/semantics/publishedVersionSubject
Abstract
The suitability of different enzymes to carry out the hydrolysis of two-different toluene-based urethane model compounds (i.e. bis(2-methoxyethyl) (4-methyl-1,3-phenylene)dicarbamate, and bis(2-methoxyethyl) (2-meth ... [+]
The suitability of different enzymes to carry out the hydrolysis of two-different toluene-based urethane model compounds (i.e. bis(2-methoxyethyl) (4-methyl-1,3-phenylene)dicarbamate, and bis(2-methoxyethyl) (2-methyl-1,3-phenylene)dicarbamate) has been demonstrated for the first time by taking advantage of ionic liquid (IL) technologies. Toluene-based urethane compounds were prepared from usual substrates in polyurethane industrial synthesis. Afterwards, their carbamate groups were target of a biocatalytic hydrolysis by means of different commercial hydrolases (i.e. lipase, urease and proteases) in either water, hydrophilic organic solvents (i.e. ethylene glycol or 1,2-dimethyl-1,3-dioxolane-4-methanol, (solketal)), or hydrophobic ILs (e.g. [C4mim][NTf2], etc.) as reaction media. Because of the insolubility of these compounds in water, most of the enzymes were unable to catalyse the hydrolysis of the di-urethane substrates in pure water, being clearly improved (up to 31.6 mU/mg for the urease case) in solketal:water (90:10, v/v) reaction media. When hydrophobic ILs were added into this reaction medium, the urease activity increased by more than twice (74.1 mU/mg). The most promising results for the hydrolysis of these urethane compounds were obtained by combining lipase and urease biocatalysts in a IL:solketal:H2O (70:25:5, v/v/v) reaction medium. These results demonstrate a possible biocatalytic approach for the hydrolytic depolymerization of polyurethane foam wastes. [-]
Funder Name
MCIN/FEDER/AEI/10.13039/501100011033 | MICINN –European Union Next Generation EU-PRTR | SENECA
Project code
PID2021- 124695OB-C21/C22 | PDC2022–133313-C21/C22 | TED2021–129626B-C21/C22 | 21884/PI/22
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© 2024 The Authors
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