Identification and Solvent Extraction-Sedimentation Removal of Metallic Elements in Coal Tar Pitch

DOI

10.2991/icmit-16.2016.148How to use a DOI?

Keywords

coal tar; medium-temperature pitch; refined pitch; modified pitch; ICP-AES

Abstract

Refined pitches were obtained by distillation and solvent extraction with raw materials of the high temperature coal tar and medium-temperature pitch, respectively. Modified pitches were achieved by air oxidation treatment of refined pitches. Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) was used to determine metallic elements of raw material and the prepared pitches. The results show that both the coal tar and medium-temperature pitch have metallic elements as follow: Ge, Pb, Ba, Mg, Ce, Cd, Na, Sn, Zn, Ni, Bi, Nb, Be, Cr, Ca, V, In, Ti, Sr, Si, Cu, Al, Fe and Mn, among which the abundance of Pb, Mg, Zn, Ni, Cr, Ca, Si, Cu, Al, Fe, and Mn were relatively larger. The content of Pb, Cu, Mn, Zn, Cr, Ni and Mg of coal tar were larger than those of the medium-temperature pitch, while the content of Ca, Al and Fe were opposite. The content of all metallic elements decreased during the process of solvent extraction, while increased during the modification of refined pitch. Compared with the refined pitch prepared by solvent extraction, the content of metallic elements in coal tar refined pitch were higher. With the treatment of air oxidation, the metallic elements in modified medium-temperature pitch and modified coal tar pitch were similar except Zn. Obviously, the modified coal tar pitch has a larger content of Zn.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Lijuan Gao
AU  - Xiaojun Zheng
AU  - Yaming Zhu
AU  - Xuefe Zhao
PY  - 2016/04
DA  - 2016/04
TI  - Identification and Solvent Extraction-Sedimentation Removal of Metallic Elements in Coal Tar Pitch
BT  - Proceedings of the 2016 3rd International Conference on Mechatronics and Information Technology
PB  - Atlantis Press
SP  - 815
EP  - 818
SN  - 2352-538X
UR  - https://doi.org/10.2991/icmit-16.2016.148
DO  - 10.2991/icmit-16.2016.148
ID  - Gao2016/04
ER  -