Effect of hydroxyl on formation of viscoelastic scum during solvent extraction of sulfuric acid with trioctylamine

Autor:	Wenjun Li, Xinrong Qiu, Bin Dong, Hualei Zhou, Zhidong Chang
Rok vydání:	2012
Předmět:	chemistry.chemical_compound chemistry Phase (matter) Extraction (chemistry) Inorganic chemistry Filtration and Separation Microemulsion Amine gas treating Sulfuric acid Fourier transform infrared spectroscopy Spectroscopy Viscoelasticity Analytical Chemistry
Zdroj:	Separation and Purification Technology. 86:137-142
ISSN:	1383-5866
DOI:	10.1016/j.seppur.2011.10.037
Popis:	In the paper, Fourier transform infrared spectroscopy (FTIR) is employed to investigate the formation of viscoelastic scum during solvent extraction of sulfuric acid with trioctylamine (TOA) as extractant. The spectra are deconvolved and peak-fitted to study the change of wave-number and the peak area of O–H stretching vibration. Results suggest that the water plays an important role in viscoelastic scum formation. The water, sulfuric acid and TOA can combined as S O… H O H …N or H O H …O S or N H…O S . With the increase of the molar ratio of sulfuric acid to TOA, the combination of the water, sulfuric acid and TOA would transform to S O… H O H …O S or N + … H O H , which may be form macro-molecules in the extraction system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b70b632575a8cfe954cc2410fc43d15a https://doi.org/10.1016/j.seppur.2011.10.037 Zobrazit plný text záznamu Full Text from ScienceDirect