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

ABSTRACT: A biomass-based catalyst with amine groups (-NH?), viz., amine-functionalized sugarcane bagasse (SCB-NH?), 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 -NH? group was grafted onto SCB successfully. The catalytic performance of SCB-NH? in Knoevenagel condensation reaction was tested in the batch and continuous flow reactions. Significantly, it was found that the catalytic performance of SCB-NH? is better in flow system than that in batch system. Moreover, the SCB-NH? 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-NH? 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 -NH? group is a potential avenue for the preparation of amine-functionalized catalytic materials in industry.

SUBMITTER: Qiao Y 

PROVIDER: S-EPMC5943943 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature