Abstract
In order to construct a recovery process of nickel from the wastewater of electroless nickel-plating, the extraction of nickel in aqueous ammonium sulfate solution with 5-dodecylsalicylaldoxime in kerosene was carried out using a vibro-mixer type continuous extractor, which has multiple vibration disks in a cylindrical tube. The effects of the initial concentrations of extractant, nickel and proton, and the mean residence time of both solutions in the extractor on the extraction rate of nickel were measured. The experimental results correlated to the complete mixing flow of both fluids in the extractor were analyzed based on the interfacial reaction rate. The calculated results for each frequency of vibration plates were well explained by the experimental results. The average extraction rate in the vibro-mixer type extractor was interpreted based on a similar interfacial reaction equation derived in a Lewis-type transfer cell. The average extraction rate constants obtained in the vibro-mixer type extractor were 10 2- to 10 3-fold larger than that in the Lewis-type transfer cell. The mixing using the vibro-mixer type extractor generates and regenerates small droplets at high speed, causing enhancement of the interfacial area and the surface renewal rate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
