Magnetically recyclable Cr complex for the dehydration of glucose to 5-HMF in acidic task specific ionic liquid

Fei Fu,Zhanqian Song,Shibin Shang,Minggui Shen,Liang Wang

doi:10.1063/1.5116236

Abstract

Magnetically recyclable Cr complex was synthesized by immobilizing Cr3(CH3COO)7(OH)2 onto the surface of amino modified Fe3O4 particles. The structure of the catalyst was well characterized by Fourier transform infrared (FT-IR), Transmission electron microscope (TEM), Inductively coupled plasma atomic emission spectroscopy (ICP-AES), Energy dispersive X-ray spectroscopy (EDX), Thermal gravity analysis (TG-ATG), Wide-angle X-ray Diffractometry (XRD) and Vibrating Sample Magnetometer (VSM). The prepared catalyst showed good catalytic performance in the conversion of glucose to HMF in acidic task specific ionic liquid (TSIL). Moreover, the catalyst could be magnetically recovered and for successive six runs without significant decrease in its activity.

Highlights

With the gradual depletion of fossil energy and the pursuit of environmental protection, sustainable development and circular economy, people begin to focus on the development and utilization of renewable resources. 5-Hydroxymethylfurfural (5-HMF), which is dehydrated from biomass such as hemicellulose, cellulose, starch, glucose and fructose etc. is a very important platform substitute of fuels and fine chemicals
In order to explore the changes on the surface of magnetic particles, Fourier transform infrared (FT-IR) was employed to give an investigation of the Fe3O4NH2, Fe3O4-NH2-SAL and Fe3O4-NH2-Cr complex
The loading amount of the Cr3(CH3COO)7(OH)2 on Fe3O4-NH2-Cr complex was determined to be 0.6935% according to Inductively coupled plasma atomic emission spectroscopy (ICP-AES)

Summary

Introduction

With the gradual depletion of fossil energy and the pursuit of environmental protection, sustainable development and circular economy, people begin to focus on the development and utilization of renewable resources. 5-Hydroxymethylfurfural (5-HMF), which is dehydrated from biomass such as hemicellulose, cellulose, starch, glucose and fructose etc. is a very important platform substitute of fuels and fine chemicals. A magnetic Fe3O4-NH2-Cr complex was successfully prepared and utilized in the conversion of glucose to HMF in ionic liquid (Fig. 1). The obtained crude product was washed with ethyl acetate several times and dried at 50 ○C for 4 h under a 500 Pa pressure to provide sulfonic acid functionalized ionic liquid [SO3H-(CH2)3-HIM][HSO4]. The obtained magnetic particles were washed with water three times and dried at 50 ○C for 4 h under a 500 Pa pressure to provide Fe3O4/1,6-hexanediamine particles.

Results

Conclusion