Year-end Sale % OFF 
Abstract
The extraction of phosphoric acid from its aqueous solutions with the long-chain tertiary amine Alamine 336 in toluene was studied at 25°C. Alamine 336 is intermediate in its extraction properties between trioctylamine and tridecylamine, but the spread in the distribution coefficients between these two does not exceed 10%. Admixing 20% by volume of dodecane with the toluene diluent produces a notable synergistic effect, but high concentrations of the aliphatic diluent lead to third phase formation. Some amine is extracted from the organic phase into dilute aqueous phosphoric acid solutions, affecting the titration of this acid with base. The distribution data can be quantitatively explained by the formation in the organic phase of two amine phosphate species with stoichiometries R3N:H3PO4 of 1 : 1 and 1 : 2. At high acid concentrations (> 4.2 M), excess acid over the 1 : 2 species is extracted.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
