Preparation of Syringaldehyde from Lignin by Catalytic Oxidation of Perovskite-Type Oxides

Ying-Xia Li; Jun-Peng Zhu; Zhong-Jun Zhang; Yong-Shui Qu

doi:10.1021/acsomega.9b02379

Preparation of Syringaldehyde from Lignin by Catalytic Oxidation of Perovskite-Type Oxides

ACS Omega. 2020 Jan 29;5(5):2107-2113. doi: 10.1021/acsomega.9b02379. eCollection 2020 Feb 11.

Authors

Ying-Xia Li¹, Jun-Peng Zhu^{1

2}, Zhong-Jun Zhang^{1

2}, Yong-Shui Qu²

Affiliations

¹ Beijing University of Chemical Technology, Beijing 100029, China.
² State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.

Abstract

The influence of different reaction conditions on the yield of syringaldehyde was studied by using perovskite oxide as the catalyst. The optimal reaction conditions are as follows: 0.60 g of dealkali lignin, 0.60 g of 5 wt % theta ring-loaded LaFe_0.2Cu_0.8O₃ catalyst, 30 mL of 1.0 mol/L NaOH solution, 160 °C reaction temperature, 0.80 MPa O₂ pressure, and 2.5 h reaction time. Under these conditions, the highest syringaldehyde yield was 10.00%. The recycling performance of the catalyst was studied. It was found by XRD analysis that the catalyst maintained high catalytic activity after four times of use.