Citation: FENG Xin-juan, MIN Xiao-jian, ZHENG Hua-an, FAN Ying-jie, LI Ya-bo, KONG Xiang-xi, WAN Chong, SUN Ming, MA Xiao-xun. Reaction (formaldehyde) separation and analysis of n-heptane extraction residue from heavy oil of medium and low temperature coal tar[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(1): 15-26. shu

Reaction (formaldehyde) separation and analysis of n-heptane extraction residue from heavy oil of medium and low temperature coal tar

1.
School of Chemical Engineering, Northwest University, International Scientific and Technological Cooperation Base for Clean Utilization of Hydrocarbon Resources, Chemical Engineering Research Center of the Ministry of Education for Advance Use Technology Energy of Northern Shaanxi, Shaanxi Research Center of Engineering Technology for Clean Coal Conversion, Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi, Xi'an 710069, China
2.
Shaanxi Coal Chemical Industry Technology Research Institute Co., Ltd., Xi'an 710070, China

Corresponding author: SUN Ming, sunming@nwu.edu.cn MA Xiao-xun, maxym@nwu.edu.cn
Received Date: 22 August 2017
Revised Date: 1 November 2017

Fund Project: the Young Science and Technology Star Project of Shaanxi Province 2017KJXX-62the National Natural Science Foundation of China 21406178Project Academic Supported by Natural Science Basic Research Plan in Shaanxi Province of China 2017JQ2040Foundation of Outstanding Young Backbone Supporting Program of Northwest University 2015the National Natural Science Foundation of China 21536009The project was supported by the National Natural Science Foundation of China (21536009, 21406178), Science and Technology Plan Projects of Shanxi Province (2017ZDCXL-GY-10-03), the Young Science and Technology Star Project of Shaanxi Province (2017KJXX-62), Project Academic Supported by Natural Science Basic Research Plan in Shaanxi Province of China (2017JQ2040) and Foundation of Outstanding Young Backbone Supporting Program of Northwest University (2015)Science and Technology Plan Projects of Shanxi Province 2017ZDCXL-GY-10-03

Figures(7)

The n-heptane extraction residue (H-CT) from heavy medium and low temperature coal tar made in northern Shaanxi by n-heptane was reacted with formaldehyde. The product (P) was divided into n-heptane soluble (HS-P), n-heptane insoluble but toluene soluble (HI-TS-P), toluene insoluble but quinoline soluble (TI-QS-P) and quinoline insoluble (QI-P). The structure and composition of P were analyzed by means of GC-MS, TG-FTIR and FT-IR. The results show that P has more contents of TI-QS-P, oxygen atoms and a higher C/H atom ratio comparing with H-CT. The contents of HS-P, HI-TS-P, TI-QS-P and QI-P are 11.63%, 26.42%, 57.08% and 4.88%, respectively. HS-P and HI-TS-P contain mainly neutral components (mainly aromatics), few acidic components (mainly phenols), and some heteroatom compounds including O, N, S. TI-QS-P, with highly thermal stability, is rich in carbonyl groups, methylene bridge bonds and fused ring aromatic compounds. Besides, it also contains phenolic hydroxyl groups and aromatic ring substitutes.
- medium and low temperature coal tar,
- phenol-formaldehyde reaction,
- polymerization,
- extraction,
- separation and analysis
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