Extraction of coal-tar pitch using NMP/ILs mixed solvents

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	Extraction of coal-tar pitch using NMP/ILs mixed solvents
	Huang JinCheng 1,2; Li ChunShan 2; Bai Lu 2; Nie Yi 2; Wang ErQiang 1; He YuJian 1; Zhang SuoJiang 2
刊名	SCIENCE CHINA-CHEMISTRY
	2014-12-01
卷号	57 期号:12 页码:1760-1765
关键词	coal-tar pitch ionic liquid NMP extraction H/C
ISSN号	1674-7291
其他题名	Sci. China-Chem.
中文摘要	Coal-tar pitch (CP) is a promising carbon raw material for producing needle coke, carbon fiber etc. During processing, the H/C ratio, ash content, and quinoline insoluble (QI) in the CP are the key factors that influence the material preparation. In this study, NMP was selected to extract CP first; then [BMIM]Cl/NMP mixed solvent was used; and finally a series of ionic liquids (ILs) mixtures with NMP were developed for the extraction of CP to obtain the refined pitch. The extracts were analyzed via elemental analysis, TGA, FT-IR, and C-13-NMR. Results indicate that different NMP/IL mass ratios or different kinds of ILs have impact on the extraction yield. The relationship of the hydrogen to carbon (H/C) ratio changed with different solvents and QI extracts were obtained. Results showed that the H/C ratios changed little between NMP extracts and could be adjusted by changing the NMP/ILs mass ratio or using different ILs. The extracts are suitable for preparation mesophase pitch because of no ash content, low QI, and appropriate H/C ratios. As a result, NMP can be used to refine pitch. In addition, [BMIM]Cl is good mixed with NMP for CP extraction, because it can obtain a relatively high yield under the same extraction conditions.
英文摘要	Coal-tar pitch (CP) is a promising carbon raw material for producing needle coke, carbon fiber etc. During processing, the H/C ratio, ash content, and quinoline insoluble (QI) in the CP are the key factors that influence the material preparation. In this study, NMP was selected to extract CP first; then [BMIM]Cl/NMP mixed solvent was used; and finally a series of ionic liquids (ILs) mixtures with NMP were developed for the extraction of CP to obtain the refined pitch. The extracts were analyzed via elemental analysis, TGA, FT-IR, and C-13-NMR. Results indicate that different NMP/IL mass ratios or different kinds of ILs have impact on the extraction yield. The relationship of the hydrogen to carbon (H/C) ratio changed with different solvents and QI extracts were obtained. Results showed that the H/C ratios changed little between NMP extracts and could be adjusted by changing the NMP/ILs mass ratio or using different ILs. The extracts are suitable for preparation mesophase pitch because of no ash content, low QI, and appropriate H/C ratios. As a result, NMP can be used to refine pitch. In addition, [BMIM]Cl is good mixed with NMP for CP extraction, because it can obtain a relatively high yield under the same extraction conditions.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Multidisciplinary
研究领域[WOS]	Chemistry
关键词[WOS]	IONIC LIQUIDS ; LIQUEFACTION RESIDUE ; ORGANIC-SOLVENTS ; DISSOLUTION ; ASPHALTENES ; LIGNITE
收录类别	SCI
原文出处	://WOS:000346047500020
语种	英语
WOS记录号	WOS:000346047500020
公开日期	2015-04-01
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/11752]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Huang JinCheng,Li ChunShan,Bai Lu,et al. Extraction of coal-tar pitch using NMP/ILs mixed solvents[J]. SCIENCE CHINA-CHEMISTRY,2014,57(12):1760-1765.
APA	Huang JinCheng.,Li ChunShan.,Bai Lu.,Nie Yi.,Wang ErQiang.,...&Zhang SuoJiang.(2014).Extraction of coal-tar pitch using NMP/ILs mixed solvents.SCIENCE CHINA-CHEMISTRY,57(12),1760-1765.
MLA	Huang JinCheng,et al."Extraction of coal-tar pitch using NMP/ILs mixed solvents".SCIENCE CHINA-CHEMISTRY 57.12(2014):1760-1765.