Comparison of Methanol with Formamide on Separation of Nitrogen Heterocyclic Compounds from Model Coal Tar Fraction by Batch Cocurrent Multistage Equilibrium Extraction. (19th October 2016)

• Record Type: Journal Article
• Authors: Kang, Ho-Cheol; Kim, Su Jin
• Is Part Of: Polycyclic aromatic compounds. Volume 36:Number 5(2016)
• Page Start: 745
• Page End: 757
• Publication Date: 2016-10-19
• Subjects: batch cocurrent multistage equilibrium extraction -- coal tar fraction -- formamide extraction -- indole -- methanol extraction -- nitrogen heterocyclic compounds; Polycyclic aromatic compounds -- Periodicals; 547
• DOI: 10.1080/10406638.2015.1048894
• Languages: English
• ISSNs: 1040-6638

Abstract

Abstract : The separation of nitrogen heterocyclic compounds ( NHC ) contained in a model coal tar fraction comprising four kinds of NHC [indole ( In ), quinoline ( Q ), iso-quinoline ( iQ ), quinaldine ( Qu )], three kinds of bicyclic aromatic compound ( BAC ) [1-methylnaphthalene ( 1MN ), 2-methylnaphthalene ( 2MN ), dimethylnaphthalene ( DMN ) mixture with ten structural isomers ( DMNs ; regarded as one component)], biphenyl ( Bp ), and phenyl ether ( Pe ) was examined by batch cocurrent three stages equilibrium extraction. The model coal tar fraction used as a raw material in this work was prepared according to the components and compositions contained in coal tar fraction (distilled temperature ranges: 240–265°C). An aqueous solution of formamide and that of methanol were used as solvent, respectively. The distribution coefficient of the entire NHC ( NHCs ) summed four kinds of NHC was much larger than that of the entire BAC ( BACs ) summed three kinds of BAC, Bp, and Pe . Irrespective of solvent used in this work, the NHCs was recovered more than 90% through three stages of the equilibrium extraction. The selectivity of NHCs based on BACs obtained through the 3 stages equilibrium extraction using an aqueous solution of formamide was higher 3.6–8 times than that using an aqueous solution of methanol. Furthermore, we investigated the recovery process of NHCs contained in coal tar fraction using the formamide experimental results obtained from this work.