Wyniki wyszukiwania - BazTech

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Przegląd badań elektrodialitycznego odzysku kwasu chlorowodorowego i skoncentrowanego strumienia jonów metali z roztworów odpadowych

Wolska M., Mrozowski J.

Rudy i Metale Nieżelazne Recykling

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2017

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R. 62, nr 3

19--24

PL

Problem zagospodarowania odpadowych roztworów kwasów mineralnych oraz odzysku metali, budzi coraz większe zainteresowanie technologiczne. W artykule dokonano przeglądu procesów elektrodialitycznego odzysku kwasu chlorowodorowego oraz koncentratu metali. Przedstawiono przykłady aplikacji procesów membranowych: elektrodializy oraz złożonych układów technologicznych typu elektrodializa i wymiana jonowa, elektrodializa i dializa dyfuzyjna w instalacjach recyklingu kwasu chlorowodorowego. Przykłady zostały omówione zarówno pod kątem technologicznym, jak i ekonomicznym.

EN

TThe problem of waste management solutions of minerał acids and metal recovery is a growing interest in the technology. In this paper, a review of processes electrodialytic recovery of hydrochloric acid and concentrated metals was presented. The examples of the application of membranę pro-cesses, ie. electrodialysis and complex technological systems such electrodialysis and ion exchange, electrodialysis and diffusion dialysis in recycling installations of hydrochloric acid was presented. The examples was discussed both in terms of technological and economic.

2

Quaternary phosphonium salts as effective extractants of zinc(II) and iron(III) ions from acidic pickling solutions

Marszałkowska B., Regel-Rosocka M., Nowak Ł., Wiśniewski M.

Polish Journal of Chemical Technology

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2010

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Vol. 12, nr 4

1-5

EN

Extraction of zinc(II) and iron(III) from hydrochloric acid solutions using quaternary phosphonium salts, CyphosŽ IL 101, CyphosŽ IL 104, CyphosŽ IL109 and CyphosŽ IL 111 in mixtures with toluene, was studied. Trihexyl(tetradecyl)phosphonium chloride (CyphosŽ IL 101) and trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate (CyphosŽ IL 104) showed the best zinc(II) and iron(III) extraction abilities. After three stages of zinc(II) extraction with CyphosŽ IL 101 and CyphosŽ IL 104 the efficiencies were 100 and 93.6%, respectively. Total iron(III) transport to the organic phase was achieved after two separation stages and amounted to 82.1 and 100% for CyphosŽ IL 101 and CyphosŽ IL 104, respectively. Zinc(II) and iron(III) could be effectively stripped from the loaded organic phases with 0.5 mol dm-3 sulfuric acid. The more hydrophobic the character of the anion type of phosphonium salts, the lower the efficiency of extraction.

3

Cathode materials for electrolysis of hydrochloric acid

Nawrat G., Parla A., Nieużyła Ł., Simka W.

Polish Journal of Chemical Technology

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2006

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Vol. 8, nr 3

41-44

EN

The paper presents the results of investigations on silver cathodes with coatings obtained by means of thermal method to be used in the electrolysis of hydrochloric acid. Active coatings based on precious metals including platinum have good corrosion resistance and low overpotential of hydrogen owing to thermal decomposition of the respective salts on a silver substrate covered with a sublayer of gold. The values of hydrogen overpotential in 22% hydrochloric acid at 70°C amount to 70 mV at the current density of j = 1 kA/m2.