Perstraction of Heat-Stable Salts from Aqueous Alkanolamine Solutions

Abstract Amine absorption processes designed to remove acid gases from gas streams generally face a major challenge of solvent degradation. This degradation leads the formation heat-stable salts (HSS), corrosive agents that irreversibly bind free alkanolamine. The present study proposes, for first time, method HSS perstraction using liquid–liquid membrane contactor allows transfer through porous membranes into hydrophobic extractant represented by methyltrioctylammonium solution in 1-octanol. provides selective extraction anions without direct mixing liquid phases or stable emulsions and extractant. For this purpose, number industrial laboratory samples fabricated polyvinylidene fluoride, polypropylene, polysulfone were investigated. Their chemical morphological stability, surface properties, transport properties tested under prolonged (>600 h) contact with model (an aqueous monoethanolamine solution) components feasibility was demonstrated formic (as an model) solvent. most promising results obtained system fluoride membrane: up 50% extracted over 18 h.