| Autor: |
Silvia S. O. Silva, Matheus R. Nascimento, Ricardo J. P. Lima, Francisco Murilo Tavares Luna, Célio Loureiro Cavalcante Júnior |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
AppliedChem, Vol 3, Iss 4, Pp 492-508 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2673-9623 |
| DOI: |
10.3390/appliedchem3040031 |
| Popis: |
In this study, a purification route was applied to crude glycerol and its valorization via etherification was evaluated. Crude glycerol samples were obtained through transesterification reactions of soybean oil with methanol using potassium hydroxide as catalyst. A set of separation steps (acidification, neutralization, salt precipitation, evaporation and removal of contaminants using ion-exchange resins) was performed for purification of crude glycerol. The glycerol contents of crude samples were 46% wt., and for purified samples they were above 98% wt. The etherification reactions were carried out with purified samples and different alcohols (ethanol, isopropanol and 3-methyl-1-butanol) placed into a batch reactor, using a small amount of Amberlyst 15 as a catalyst, with autogenous pressure and solvent-free conditions. The glycerol conversion, selectivity and yield to ethers were evaluated. A glycerol conversion of up to 97% wt. was obtained when using ethanol. For isopropanol, the glycerol conversion rate was 85% (97.1% of monoether and 2.8% of diether). However, the selectivity to ethers for 3-methyl-1-butanol was negligible ( |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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