Conversion of phenolic mixture to refractory resins: A resourcezation strategy for phenolic distillation residues

Jing Zhou; Xingang Li; Jinze Du; Lin He; Chengyang Wang; Hong Sui

doi:10.1016/j.jhazmat.2021.125357

Conversion of phenolic mixture to refractory resins: A resourcezation strategy for phenolic distillation residues

J Hazard Mater. 2021 Jul 15:414:125357. doi: 10.1016/j.jhazmat.2021.125357. Epub 2021 Feb 17.

Authors

Jing Zhou¹, Xingang Li², Jinze Du³, Lin He⁴, Chengyang Wang⁵, Hong Sui¹

Affiliations

¹ School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; National Engineering Research Centre of Distillation Technology, Tianjin 300072, China.
² School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; National Engineering Research Centre of Distillation Technology, Tianjin 300072, China; Zhejiang Institute of Tianjin University, Ningbo, Zhejiang 315201, China.
³ National Engineering Research Centre of Distillation Technology, Tianjin 300072, China; Zhejiang Institute of Tianjin University, Ningbo, Zhejiang 315201, China.
⁴ School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; National Engineering Research Centre of Distillation Technology, Tianjin 300072, China; Zhejiang Institute of Tianjin University, Ningbo, Zhejiang 315201, China. Electronic address: linhe@tju.edu.cn.
⁵ School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.

PMID: 33662791
DOI: 10.1016/j.jhazmat.2021.125357

Abstract

A new resourcezation way has been proposed to address the treatment challenges of the light phenolic distillation residue (LPDR) from the coal-based phenolic distillation residue. Herein, the LPDR, which was collected at 20 kPa and 220 °C from the phenolic distillation residue, has been further used to synthesize the phenolic resin (named as RPF) for MgO-C refractories. It is found that the conversion efficiency of crude phenol mixture to RPF is 71.3%, which is lower than that of pure phenol. To increase the conversion efficiency and improve the properties of RPF, the crude phenolic mixture was blended with pure phenol for the synthesis. The optimal addition mass ratio of phenol in the crude phenol mixture (phenol/total phenolic compounds) is determined to be 0.8, where the obtained RPF could satisfy or even better than the national standard. Further addition of 10 wt% of urotropine (HMTA) as curing agent and 9 wt% of ferrocene (Fc) as modifier (named as MRPF) are found to significantly improve the graphitization of RPF. Under these conditions, the DTG at temperature of maximum mass lose rate (T_max) of MRPF was lower than that of commercial resin. The graphitization level was as high as 61.6% with the residual carbon rate up to 41.4%, which are higher than those of national standard. These findings provide insights for the resourcezation of the phenolic distillation residue.

Keywords: Distillation residue; Ferrocene; Graphitization level; Phenolic resin; Thermal stability.

Publication types

Research Support, Non-U.S. Gov't