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AssigneeVEB Leuna-Werke "Walter Ulbricht"
InventorsWilfried Fuchs, Horst Richter, Vendelin Kaufmann, Wolfgang Renker, Roland Kober
Estimating the term…
A method for removal of oxygen dissolved in water, especially from reservoir drinking water, and for preservation purposes based on hydrazine, having no organic activators and assuring a high reaction velocity with respect to dissolved oxygen within a broad pH-range at low temperature and without a time-dependent reduction of its effectiveness. Cationic and anionic complexes of trivalent cobalt with inorganic ligands, or mixtures thereof, are used as activators. Preferred activators are (Co(NH.sub.3).sub.5 Cl)Cl.sub.2 and Na.sub.3 Co(NO.sub.2).sub.6. Hydrazine solutions with these activators are suitable for the removal of oxygen from gases.
A process for the removal of oxygen dissolved in water by improving the activity of hydrazine as an oxygen removal agent which comprises adding an effective amount of hydrazine and a trivalent cobalt complex selected from the group consisting of sodium hexanitritocobalt (III), cobalt (III) hexaminochloride, chloropentamine cobalt (III) chloride, carbonatopentamino cobalt (III) nitrate, and mixtures thereof, to oxygen-containing water, about 0.01 to 0.3% by weight of cobalt complex being added to an aqueous solution comprising about 10 to 25% by volume of hydrazine, said cobalt complex and hydrazine being added to said oxygen-containing water at a pH of about 8 to 11.
Dependencies are inferred from the claim text.