[Improving the efficacy of synergetically facilitated pertraction of p-aminobenzoic acid by increasing the reextraction rate].
The studies on facilitated pertraction of PABA with Amberlite LA-2 and 1-octanol as phase modifier indicated the increase of the process efficiency and, implicitly, of the transport capacity of the liquid membrane by adding KOH in the stripping phase. Thus, the use of KOH led to the diminution of the kinetic resistance of the reextraction process, with positive effects on the acid final mass flow and permeability factor. Compared to the similar pertraction systems containing NaOH in the stripping phase and in direct correlation with the pertraction parameters (pH-gradient between the feed and stripping phases, carrier and alchohol concentrations inside the liquid membrane), the final mass flow can be accelerated for about 1.9 times, and the permeability through liquid membrane can be enhanced for about 1.5 times in presence of KOH.
Universitatea Tehnică Gh. Asachi Iaşi, Facultatea de Inginerie Chimică şi Protecţia Mediului.
Lenuţa
L
Kloetzer
Anca-Irina
AI
Galaction
D
D
Caşcaval
D020003:1-Octanol / Q000737:chemistry*; D010129:4-Aminobenzoic Acid / Q000737:chemistry* / Q000302:isolation & purification; D000588:Amines / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006878:Hydroxides / Q000737:chemistry*; D007202:Indicators and Reagents / Q000737:chemistry; D010539:Permeability; D017680:Potassium Compounds / Q000737:chemistry*; D012995:Solubility; D012997:Solvents / Q000737:chemistry*; D013053:Spectrophotometry; D014803:Vitamin B Complex / Q000737:chemistry* / Q000302:isolation & purification
D000588:Amines; D006878:Hydroxides; D007202:Indicators and Reagents; D017680:Potassium Compounds; D012997:Solvents; C016214:Amberlite LA-2; D014803:Vitamin B Complex; D020003:1-Octanol; D010129:4-Aminobenzoic Acid; C029943:potassium hydroxide