Catalytic Gas-Phase Production of Lactide from Renewable Alkyl Lactates
| Autor: | Rik De Clercq, Michiel Dusselier, Ekaterina Makshina, Bert F. Sels |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Green chemistry Lactide 010405 organic chemistry General Medicine General Chemistry Transesterification 010402 general chemistry 01 natural sciences Bioplastic Catalysis transesterification 0104 chemical sciences chemistry.chemical_compound chemistry Polylactic acid Organic chemistry lactide sustainable chemistry gas phase supported catalysts alkyl lactates Racemization Alkyl |
| Zdroj: | Angewandte Chemie International Edition. 57:3074-3078 |
| ISSN: | 1433-7851 |
| DOI: | 10.1002/anie.201711446 |
| Popis: | A new route to lactide, which is a key building block of the bioplastic polylactic acid, is proposed involving a continuous catalytic gas-phase transesterification of renewable alkyl lactates in a scalable fixed-bed setup. Supported TiO2 /SiO2 catalysts are highly selective to lactide, with only minimal lactide racemization. The solvent-free process allows for easy product separation and recycling of unconverted alkyl lactates and recyclable lactyl intermediates. The catalytic activity of TiO2 /SiO2 catalysts was strongly correlated to their optical properties by DR UV/Vis spectroscopy. Catalysts with high band-gap energy of the supported TiO2 phase, indicative of a high surface spreading of isolated Ti centers, show the highest turnover frequency per Ti site. ispartof: Angewandte Chemie - International Edition vol:57 issue:12 pages:3074-3078 ispartof: location:Germany status: published |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text