期刊
CATALYSIS TODAY
卷 388-389, 期 -, 页码 288-300出版社
ELSEVIER
DOI: 10.1016/j.cattod.2020.06.030
关键词
Alumina; Epoxidation; Experimental design; Green chemistry; Heterogeneous catalysis; Monomers; Limonene; Limonene diepoxide
资金
- State of Sao Paulo Research Foundation (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, FAPESP) [2018/01258-5, 2008/57860-3, 2009/16480-6]
- Brazilian National Council on Scientific and Technological Development (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, CNPq, Brazil) [309570/2016-6, 422290/2016-5, 573661/2008-1, 245292/2012-8]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
- National Institute of Science and Technology in Biofabrication (INCT-BIOFABRIS)
- Sustainable Technologies Unit of UFABC (NuTS)
The green catalytic system used in the oxidation of (R)-limonene offers advantages such as low cost, toxicity-free reagents, and water as the only by-product. Through experimental design and analysis, the system was optimized for high efficiency in producing limonene diepoxide. Various analytical techniques confirmed the synthesized and purified product's structure.
The green catalytic system (Al2O3/H2O2/ethyl acetate) used in the oxidation of (R)-limonene has many advantages since the reagents have low cost, it is toxicity-free (no heavy metals and no toxic solvents are utilized), and water is the only by-product. The synthesized epoxide may have applications in several industrial segments like adhesives, polymers, resins, and others that require a clean process, especially as a precursor for medical biomaterial applications. An experimental design 23 with 17 assays (6 axial points and central point triplicate) has been carried out for the optimization of the conversion and selectivity towards limonene diepoxide. The assessed variables included the quantities of alumina, limonene, and hydrogen peroxide (70% aq). The analysis of variance (ANOVA) confirmed the validity of the mathematical model obtained with a 90% confidence interval in the studied range. The conversion and selectivity towards limonene diepoxide was >99%, with a reaction time of 10 h, showing the high efficiency of this catalytic system. FTIR, Raman, GC/MS, H-1, C-13, and HSQC NMR techniques confirmed the structure of the synthesized and purified limonene diepoxide.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据