Investigation of the State of Bis(2,4,4-trimethylpentyl)dithiophosphinic Acid in Nonane in the Presence of Electron-Donor Additives

Autor:	N. A. Grigorieva, L. K. Nikiforova, N. I. Pavlenko, I. Yu. Fleitlikh, G. L. Pashkov
Rok vydání:	2010
Předmět:	Activity coefficient chemistry.chemical_classification Sulfide Hydrogen bond General Chemical Engineering Inorganic chemistry Electron donor General Chemistry chemistry.chemical_compound chemistry Liquid–liquid extraction Amine gas treating Nonane Trioctylphosphine oxide Nuclear chemistry
Zdroj:	Solvent Extraction and Ion Exchange. 28:510-525
ISSN:	1532-2262 0736-6299
DOI:	10.1080/07366299.2010.482457
Popis:	An IR-spectroscopy method is used to examine the state of nonane diluted bis(2,4,4-trimethylpentyl)dithiophosphinic acid (HR) in the presence of various electron-donor additives (L). Trioctyl amine (TOA), n-octanol, trioctylphosphine oxide (TOPO), tributylphosphate (TBP), and triisobutylphosphine sulfide (TIBPS) were used as additives. The formation of hydrogen bonded complexes (H-complexes) via proton transfer and a [TOAH+][R−] ion pair was shown to occur in the system containing HR and TOA. For the other additives, except n-octanol, during the formation of the H-complexes, hydrogen bonding without proton transfer takes place. In the HR and n-octanol mixture H-complexes having a structure in which the acid exhibits both proton and electron-donor properties are formed. The concentrations of the monomers (CHR ) and the activity coefficients for the dithiophosphinic acid (γ HR(tot) ) in the presence of the additives were calculated. It was shown that CHR and γ HR(tot) depend essentially on the type...
Databáze:	OpenAIRE
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