Recovery of Picolinic Acid from Aqueous Streams Using a Tertiary Amine Extractant

Tuyun A. F. , Uslu H., Gokmen S., Yorulmaz Y.

JOURNAL OF CHEMICAL AND ENGINEERING DATA, vol.56, no.5, pp.2310-2315, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 56 Issue: 5
  • Publication Date: 2011
  • Doi Number: 10.1021/je1012923
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.2310-2315


Solvent extraction using an extractant/diluent system was determined for the recovery of picolinic acid. Trioctylamine (TOA) was used as the extractant and alcohols (isoamyl alcohol and 1-hexanol), esters (ethyl acetate and propyl acetate), and hydrocarbons (n-heptane and toluene) as the diluents. TOA gives a complex with the acid resulting in an acid-amine complex which is solvated by the diluents. On the basis of results from batch extraction experiments, a mass-action analysis was introduced for modeling extraction. The experimental results of batch extraction experiments are reported as distribution coefficients, (K(D) = (C*(PA)/C(PA))), loading factors, Z, and extraction efficiency, E. The highest synergistic extraction efficiency was found to be 96.620 for the TOA + isoamyl alcohol extractant system with a K(D) value of 28.587 and Z value of 0.588.