Purification of waste water from hydrazine production
AssigneeBayer Aktiengesellschaft
InventorsKurt-Wilhelm Eichenhofer, Reinhard Schliebs
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Abstract
A process for the purification of waste water produced in hydrazine production by the oxidation of ammonia or an amine with an oxidizing agent in the presence of an aldehyde or ketone, comprising intensively mixing the waste water with chlorine or a hypochlorite at a temperature of about 10.degree. C to 110.degree. C and a pH of about 5 to 10 until the treated waste water reaches a redox potential to platinum, relative to Ag/AgCl, of about -400 mV to +800 mV. Advantageously a small amount of waste water is distilled off both before and after the chlorine or hypochlorite treatment.
Claims9
A process for the purification of waste water produced in hydrazine production by the oxidation of ammonia or amine with an oxidizing agent in the presence of an aldehyde or ketone, such waste water containing small amounts of hydrazine and organic hydrazine derivatives, comprising intensively mixing the waste water with chlorine or a hypochlorite at a temperature of about 10.degree. C to 110.degree. C and a pH of about 5 to 10 until the treated waste water reaches a redox potential to platinum, relative to Ag/AgCl, of about -400 mV to +800 mV.
Dependencies are inferred from the claim text.