Abstract
Solvent extraction of phosphoric acid with Alamine 336 and tri-n-octylamine in toluene has been investigated. The activity of phosphoric acid is expressed as a polynomial of ionic strength and Bromley's model for electrolyte solutions is employed for calculation of ionic activity coefficients. Three species R3N (H3P04) n with n = 1, 2 and 3 in the organic phase are taken into account for explanation of the distribution equilibria. The extraction constants have been determined as log K11 = 2.05, log K12 = 3.61 and log K13 = 3.84 respectively. Aggregation and other non-ideal behaviour in the organic phase are described by letting the corresponding activity coefficient quotients be a function of the total concentration of acid in the organic phase.
| Original language | English |
|---|---|
| Pages (from-to) | 883-905 |
| Journal | Solvent Extraction and Ion Exchange |
| Volume | 4 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1986 |
Subject classification (UKÄ)
- Chemical Engineering