Meng-Xiang Shen , Chen-Qiang Deng , Jie Yang , Jin Deng
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引用次数: 0
摘要
乙酰丙酸(LA)来源于木质纤维素生物质,可通过各种化学转化生产高价值化学品。然而,关于左旋乙烯酸中 C-C 键裂解的研究还很有限。甲基乙基酮(MEK)是一种具有广泛工业用途的优质溶剂,传统上由石油衍生的正丁烯生产。在此,我们报告了一种利用无金属光催化系统从 LA 生产 MEK 的方法。利用吖啶化合物作为光敏剂,噻吩酚作为氢转移试剂,在温和的反应条件下实现了 MEK 的高选择性和高产率,并且利用微通道连续流光反应器大大缩短了反应时间。此外,生命周期评估表明,这种方法的碳排放量低于其他利用 LA 生产 MEK 的方法。该催化系统为从生物基平台分子 LA 生产 MEK 提供了一种绿色高效的方法,符合可持续发展的要求。
Preparation of methyl ethyl ketone from biomass-derived levulinic acid using a metal-free photocatalytic system and life cycle assessment study†
Levulinic acid (LA) is derived from lignocellulosic biomass and can undergo various chemical transformations to produce high-value chemicals. However, there are limited studies on C–C bond cleavage in LA. Methyl ethyl ketone (MEK) is a high-quality solvent with a wide range of industrial applications, traditionally produced from petroleum-derived n-butene. Here, we report a method for the production of MEK from LA using a metal-free photocatalytic system. Using acridine compounds as photosensitizers and thiophenols as hydrogen transfer reagents, high selectivity and yield of MEK are achieved under mild reaction conditions, and the reaction time is significantly shortened using a microchannel continuous flow photoreactor. Additionally, life cycle assessment indicates that this method has lower carbon emissions than other MEK production methods from LA. This catalytic system provides a green and efficient method to produce MEK from bio-based platform molecule LA, which meets the requirements of sustainable development.
期刊介绍:
ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels.
The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.