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Amine-Functionalized Sugarcane Bagasse: A Renewable Catalyst for Efficient Continuous Flow Knoevenagel Condensation Reaction at Room Temperature.

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Title: Amine-Functionalized Sugarcane Bagasse: A Renewable Catalyst for Efficient Continuous Flow Knoevenagel Condensation Reaction at Room Temperature.
Authors: Qiao, Yanhui, Teng, Junjiang, Wang, Shuangfei, Ma, Hao
Source: Molecules; Jan2018, Vol. 23 Issue 1, p43, 13p, 2 Diagrams, 3 Charts, 4 Graphs
Abstract: A biomass-based catalyst with amine groups (-NH2), viz., amine-functionalized sugarcane bagasse (SCB-NH2), was prepared through the amination of sugarcane bagasse (SCB) in a two-step process. The physicochemical properties of the catalyst were characterized through FT-IR, elemental analysis, XRD, TG, and SEM-EDX techniques, which confirmed the -NH2 group was grafted onto SCB successfully. The catalytic performance of SCB-NH2 in Knoevenagel condensation reaction was tested in the batch and continuous flow reactions. Significantly, it was found that the catalytic performance of SCB-NH2 is better in flow system than that in batch system. Moreover, the SCB-NH2 presented an excellent catalytic activity and stability at the high flow rate. When the flow rate is at the 1.5 mL/min, no obvious deactivation was observed and the product yield and selectivity are more than 97% and 99% after 80 h of continuous reaction time, respectively. After the recovery of solvent from the resulting solution, a white solid was obtained as a target product. As a result, the SCB-NH2 is a promising catalyst for the synthesis of fine chemicals by Knoevenagel condensation reaction in large scale, and the modification of the renewable SCB with -NH2 group is a potential avenue for the preparation of amine-functionalized catalytic materials in industry. [ABSTRACT FROM AUTHOR]
Subject Terms: BAGASSE, FOURIER transform infrared spectroscopy, CARBON-carbon bonds, CARBOCYCLIC acids, CARBONYL group
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ISSN: 14203049
DOI: 10.3390/molecules23010043
Database: Complementary Index
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