Selective recovery of a pyridine derivative from an aqueous waste stream containing acetic acid and succinonitrile with solvent impregnated resins

CO2-enhanced extraction of acetic acid from fermented wastewater

“…Since the (S/F) min needed to use [P 666,14 ][Phos] in the counter-current column described above is rather low, it may be practical to impregnate [P 666,14 ][Phos] in solid particles. 39 Considering the ratio of the extracted HAc to the coextracted water in the solvents, as shown in Fig. 3, it can be concluded that [P 666,14 ][Phos] is superior to 20 wt% TOA in n-octanol in terms of extraction capacity and selectivity.…”

Pervaporation Removal of Pyridine from Saline Pyridine/Water Effluents Using PEBA-2533 Membranes: Experiment and Simulation

“…Pyridine, as one of the most important nitrogenous heterocyclic compounds, has been widely used in the manufacture of different pharmaceutical compounds, pesticides, rubber products, paints, and adhesives. , Hence, a large amount of effluents containing pyridine is also produced as a byproduct inevitably. − However, the discharge of pyridine into the environment would be harmful to the ecosystem and human beings because it could cause respiratory, heart, and nervous system diseases and is considered one of the hazardous chemicals by the United States Environmental Protection Agency . Thus, it is important to recover pyridine from wastewater, which is both beneficial to the environment and economic value. − A significant number of studies have been conducted on pyridine wastewater treatment, such as adsorption and extractive distillation. ,, However, it is difficult to recycle pyridine from a dilute aqueous solution . On the one hand, pyridine and water would form an azeotrope at 93.6 °C, with 59 wt % pyridine in it; on the other hand, pyridine is present in effluents at a low concentration, which makes the recovery of pyridine a huge challenge.…”