Published May 30, 1984 | Version v1
Patent Metadata-only

Process for denitration of aqueous nitric acid waste solutions containing salts

Creators

Description

The purpose of the invention is to reduce the acid and nitrate content of nitric acid waste solutions as much as possible and to reduce the total salt content of the waste solution, without having to worry about strong reactions or an increase in the volume of the waste solution. The invention should also make a precipitation stage for actinides, for example, or other materials, following the denitration, easier. This is achieved by mixing the waste solution with ethyl alcohol at room temperature and heating the mixture to at least 800C. (orig./HP)

Availability note (English)

Available from Deutsches Patentamt, Muenchen (Germany, F.R.).

Abstract (German)

Der Erfindung liegt die Aufgabe zugrunde, den Saeure- und Nitratgehalt von salpetersauren Abfall-Loesungen weitgehendst zu reduzieren und den Gesamtsalzgehalt der Abfall-Loesung zu verringern, ohne dass heftige Reaktionen oder eine Vergroesserung des Volumens der Abfall-Loesung befuerchtet werden muss. Die Erfindung soll ausserdem einen an die Denitrierung anschliessenden Faellungsschritt fuer beispielsweise Aktiniden oder andere geloeste Stoffe erleichtern. Dies wird dadurch erreicht, dass die Abfall-Loesung bei Raumtemperatur mit Ethylalkohol vermischt und die Mischung auf mindestens 800C erwaermt wird. (orig./HP)

Additional details

Additional titles

Original title (German)
Verfahren zur Denitrierung waessriger, salpetersaurer, salzhaltiger Abfall-Loesungen

Publishing Information

Imprint Pagination
9 p.
IPC:
Int. Cl. G21F 9/06; C02F 1/58; A62D 3/00.
IPC
Int. Cl. G21F 9/06; C02F 1/58; A62D 3/00.
Patent number
DE patent document 3243840/A/

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
17046779
Subject category
S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS; S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
AQUEOUS SOLUTIONS; DENITRATION; FUEL REPROCESSING PLANTS; HIGH-LEVEL RADIOACTIVE WASTES; LIQUID WASTES; NITRIC ACID; PRECIPITATION; PUREX PROCESS; RADIOACTIVE WASTE PROCESSING
Descriptors DEC
CHEMICAL REACTIONS; DISPERSIONS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; MANAGEMENT; MATERIALS; MIXTURES; NITROGEN COMPOUNDS; NUCLEAR FACILITIES; OXYGEN COMPOUNDS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; REPROCESSING; SEPARATION PROCESSES; SOLUTIONS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES