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Extraction of coal-tar pitch using NMP/ILs mixed solvents
Alternative TitleSci. China-Chem.
Huang JinCheng1,2; Li ChunShan2; Bai Lu2; Nie Yi2; Wang ErQiang1; He YuJian1; Zhang SuoJiang2
2014-12-01
Source PublicationSCIENCE CHINA-CHEMISTRY
ISSN1674-7291
Volume57Issue:12Pages:1760-1765
AbstractCoal-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.; 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.
KeywordCoal-tar Pitch Ionic Liquid Nmp Extraction H/c
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11426-014-5189-5
URL查看原文
Indexed BySCI
Language英语
WOS KeywordIONIC LIQUIDS ; LIQUEFACTION RESIDUE ; ORGANIC-SOLVENTS ; DISSOLUTION ; ASPHALTENES ; LIGNITE
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000346047500020
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11752
Collection研究所(批量导入)
Affiliation1.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
Recommended Citation
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.
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