利用多相催化剂将生物质衍生分子转化为乙酰丙酸烷基酯

Reactions Pub Date : 2023-11-01 DOI:10.3390/reactions4040038
Nobutaka Yamanaka, Shogo Shimazu
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引用次数: 0

摘要

乙酰丙酸烷基酯是一种很有前途的、用途广泛的生物质衍生化学品,可作为燃料添加剂、调味剂、香料、溶剂和合成有价值的γ-戊内酯的前体。一种合成乙酰丙酸烷基酯的方法是在具有丰富Brønsted酸位的固体酸催化剂存在下,乙酰丙酸与相应的烷基醇发生酯化反应。烷基乙酰丙酸酯也可以由其他生物质来源的分子如糠醛和糠醛分别通过醇解和一锅转化合成。到目前为止,已经开发了各种多相催化剂,用于将生物质衍生的分子(乙酰丙酸、糠醇和糠醛)转化为乙酰丙酸烷基酯。为了获得高产量的目标产物,研究人员采用了多种策略,包括增加Brønsted的酸度,分散和整合Brønsted酸位,诱导介孔的形成,以及诱导存在于催化剂表面的金属- Brønsted酸位的协同效应。本文综述了多相催化剂在转化过程中的性能,介绍了多相催化剂的设计和开发,保证了乙酰丙酸烷基酯的优异收率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Conversion of Biomass-Derived Molecules into Alkyl Levulinates Using Heterogeneous Catalysts
Alkyl levulinates are promising and versatile biomass-derived chemicals, which are utilized as fuel additives, flavoring agents, fragrances, solvents, and precursors for synthesizing valuable γ-valerolactone. A method for synthesizing alkyl levulinates involves the esterification of levulinic acid with the corresponding alkyl alcohols in the presence of solid acid catalysts that have abundant Brønsted acid sites. Alkyl levulinates can also be synthesized from other biomass-derived molecules such as furfuryl alcohol and furfural via alcoholysis and one-pot conversion, respectively. Thus far, various heterogeneous catalysts have been developed for the conversion of the biomass-derived molecules (levulinic acid, furfuryl alcohol, and furfural) into alkyl levulinates. To obtain the target products in high yields, numerous strategies have been employed including increasing Brønsted acidity, dispersing and incorporating Brønsted acid sites, inducing the formation of mesopores, and inducing a synergistic effect of metal–Brønsted acid sites that are present on a catalyst surface. Here, we summarily reviewed the performances of the heterogeneous catalysts in the conversions, describing the design and development of the heterogeneous catalysts that ensured the excellent yield of alkyl levulinates.
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