Novel Type of Impinging Streams Contactor for Liquid−Liquid Extraction

Abstract

An experimental study was conducted on liquid−liquid extraction of succinic acid by means of normal butanol from its aqueous solution (BSW), iodine from its aqueous solution by means of kerosene (KIW), and acetic acid by means of distilled water from kerosene (WAK) in a novel type of contactor based on an impinging streams technique. This high-intensity jet contactor provides significant improvement over the conventional extractor because of the impingement of high-velocity feed streams upon one another in a relatively small contactor volume, resulting in a high-turbulent mixing of two phases. As a result of both the impinging process and shear forces exerted on the phases, the overall volumetric (capacity) mass-transfer coefficients, K L a, of up to 15, 23, and 26 min-1 have been obtained for BSW, KIW, and WAK, respectively. The order of magnitudes of the latter coefficients are higher than typical values obtained by conventional extractors. In addition, the effects of the upper disk speed, solution flow rate, disk diameter, distance between disks and the enhancing effect of impinging streams have been investigated. These experimental results verify the capability of the new contactor in liquid−liquid extraction.

Effect of aqueous phase pH on liquid–liquid extraction with impinging-jets contacting technique

“…In a number of previously published articles by Berman and Tamir [8], and Dehkordi [9][10][11][12]; in addition to our recent work [13], the great potential of impinging jets technique for the liquid-liquid extraction process has been demonstrated. The aim is to find the role of pH and hydroxyl ions on the efficiency and mass transfer coefficient of process.…”

Low interfacial tension liquid–liquid extraction with impinging-jets contacting method: Influencing parameters and relationship

“…Rotating disc contactor [20] Butanol-succinic acid-water 63-266 Impinging streams contactor [21] Butanol-succinic acid-water 775-2500…”

Effect of surface properties on the flow characteristics and mass transfer performance in microchannels

“…10, where the overall volumetric mean mass transfer coefficients are taken from pictures or tables presented in literatures (Laddha and Degaleesan, 1976;Shah and Sharma, 1971;Dehkordi, 2001) and from Figs. 6-9 in this paper, respectively.…”