Spatial Separation of Copper and Cobalt Oxalate by Flow-Driven Precipitation

A precipitation reaction is investigated far from equilibrium by introducing a continuous flow of the homogeneous mixture of water-soluble metal salts into sodium oxalate solution. The spreading gravity current maintained by the density difference between the solutions creates a radially symmetric p...

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Bibliographic Details
Published inCrystal growth & design Vol. 17; no. 9; pp. 5000 - 5005
Main Authors Tóth-Szeles, Eszter, Bohner, Bíborka, Tóth, Ágota, Horváth, Dezső
Format Journal Article
LanguageEnglish
Published American Chemical Society 06.09.2017
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Summary:A precipitation reaction is investigated far from equilibrium by introducing a continuous flow of the homogeneous mixture of water-soluble metal salts into sodium oxalate solution. The spreading gravity current maintained by the density difference between the solutions creates a radially symmetric precipitate pattern that contains spatially separated copper oxalate monohydrate and cobalt oxalate tetrahydrate, identified by X-ray diffraction measurements. In the transition zone, a unique crystalline composite containing copper oxalate plates with cobalt oxalate coating also forms.
ISSN:1528-7483
1528-7505
DOI:10.1021/acs.cgd.7b01020