Dibutylphosphoric acid

The thermal decomposition of liquid tributyl phosphate at 178-240 °C may be followed by the rate of formation of dibutylphosphoric acid. Below 3% decomposition the reaction is first-order. At higher acid concentrations acid catalysis is observed. The main reaction seems to be dealkylation... 

However, a number of organophosphorus compounds are efficient extractants as they and their complexes are very soluble in organic solvents. The most important of these are monobasic diethylhexylphosphoric acid (HDEHP) and dibutylphosphoric acid (HDBP). The actinide MO + ions are very effectively extracted by these reagents as are the actinide (IV) ions. 

Fedorov, Y.S., Zilberman, B.Y., Shmidt, O.V. 2008. Liquid HLW processing using zirconium salt of dibutylphosphoric acid. ATALANTE 2008 Nuclear Fuel Cycles for a Sustainable Future, May, Montpellier, France. 

Shmidt, O.V., Zilberman, B.Ya., Fedorov, Yu.S., Suglobov, D.N., Puzikov, V.A., Mashkov, L.G., Palenik, Yu.V., Glekov, R.G. Extraction properties of dibutylphosphoric acid zirconium salt in recovery of transplutonium and rare-earth elements from nitric acid solution. Radiokhimiya (2002), 44 (5), 428 133. 

Tripathi, S.C., Ramanujam, A., Nadkarni, M.N., Bandyopadhyay, C. 1986. Thin-layer chromatographic separation and determination of dibutylphosphoric acid in a mixture of monobutylphophoric acid and tributyl phosphate. Analyst 111 239-240. 

Lash, R.P, Hill, C.J. 1979. Ion chromatographic determination of dibutylphosphoric acid in nuclear fuel reprocessing streams. J. Liquid Chromatogr. 2(3) 417 -27. 

Zaitsev, V.D., Khaikin, G.I. 1994. Precursors of dibutylphosphoric acid upon radiolysis of tributyl phosphate. High Energy Chem. 28(4) 269-272. (Translated from Khimiya... 

CgH1904P, phosphoric acid 0,0-dibutylester (dibutylphosphoric acid), HL ... 

Lash, R. P. Hill, C. J. "Ion Chromatographic Determination of Dibutylphosphoric Acid in Nuclear Fuel Reprocessing Streams", Presented at the Second National Symposium on Ion Chromatographic Analyses of Environmental Pollutants ... 

Alkylphosphoric acids are acidic extractants sometimes called liquid cation exchangers due to exchange of H+ ions for the extracted cations. They have been used for many metal ions. Examples include mono-(2-ethylhexyl)phosphoric acid (MEHP), dibutylphosphoric acid (DBP), and di-(2-ethylhexyl)phosphoric acid (DEHP). 

Over 95% Sn can be removed from an aqueous solution which contains 3 ig/ml Sn, and which has been made 1 M in HNO and 3% in H202> by ex- -tracting for 5 minutes with an eq ial volume of 0. 6M dibutylphosphoric acid... 

The metal complexes formed by the anionic organophosphorus extractants are, on the other hand, very soluble in organic solvents. Such compounds have therefore been used for various technical processes. Most important is the monobasic diethylhexylphosphoric acid (HDEHP), but dibutylphosphoric acid (DBP) has also been widely applied [103,155]. Some data illustrating the properties of these extractants are collected in Table 21.19. 

The addition of dibutylphosphoric acid gave (Bu0)2P(0) OZnCH2l 69, which is a more reactive reagent and can be stored. The zinc reagent 69 maintains reactivity for one week when stored at —22°C (Scheme 1.39) [70]. 

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