DE572356C - Process for the extraction of radioactive substances - Google Patents

Process for the extraction of radioactive substances

Info

Publication number
DE572356C
DE572356C DE1930572356D DE572356DD DE572356C DE 572356 C DE572356 C DE 572356C DE 1930572356 D DE1930572356 D DE 1930572356D DE 572356D D DE572356D D DE 572356DD DE 572356 C DE572356 C DE 572356C
Authority
DE
Germany
Prior art keywords
radioactive substances
extraction
carbonate
radium
gas stream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE1930572356D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KURT WEIL DR
Original Assignee
KURT WEIL DR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KURT WEIL DR filed Critical KURT WEIL DR
Application granted granted Critical
Publication of DE572356C publication Critical patent/DE572356C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F13/00—Compounds of radium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

Verfahren zur Gewinnung radioaktiver Substanzen Zur Anreicherung bzw. Trennung von radioaktiven Substanzen in Carbonatgemischen durch thermische Zersetzung der leichter zersetzbaren Carbonate und folgendes Auswaschen der gebildeten Oxyde ist nach Patent 518 2o5 die dauernde Entfernung des gebildeten Kohlendioxyds bei möglichst niedrigen Druck erforderlich. Nach dem Massenwirkungsgesetz ist für die Einstellung des Gleichgewichts zugunsten der Oxydbildung lediglich die Herabsetzung des Partialdruck-es des Kohlendioxyds erforderlich. Diese kann außer durch dauerndes Abpumpen des Kohlendioxyds im Vakuum = nach Patent 5i8 205 - nach vorliegender Erfindung auch dadurch erzielt werden, daß man das Kohlendioxyd während der thermischen Zersetzung des Carbonatgemisches dauernd mit einem indifferenten Gasstrom ausspült. .Dieser Gasstrom bewirkt, daß das Kohlendioxyd einen minimalen Partialdruck nicht übersteigen kann, so daß es schon bei relativ niederen Temperaturen aus den zersetzbaren Komponenten des Gemisches freigemacht wird. Besonders gut ist die erzielte Wirkung, wenn man den indifferenten Gasstrom bei stark vermindertem Druck über oder durch das Glühgut streichen läßt. Ausführungsbeispiel Ein Carbonatgemisch, z. B. 5 g Bariumcarbonät und 18 mg Radiumcarbonat, wird bei 8oo° im Stickstoff- oder Wasserstoffstrom mehrere Stunden behandelt. Das gebildete Bariumoxyd wird -nachher von dem unzersetzten Radiumcarbonat durch Auswaschen mit heißem Wasser abgetrennt. Der Gasstrom kann unter Atmosphärendruck übergeleitet werden, der Glühprozeß wird jedoch wesentlich abgekürzt, wenn man den Hilfsgasstrom unter dauerndem Pumpen bei stark vermindertem Druck strömen läßt.Process for obtaining radioactive substances According to Patent 518 2o5, continuous removal of the carbon dioxide formed at the lowest possible pressure is necessary for the enrichment or separation of radioactive substances in carbonate mixtures by thermal decomposition of the more easily decomposable carbonates and subsequent washing out of the oxides formed. According to the law of mass action, all that is required to adjust the equilibrium in favor of oxide formation is to lower the partial pressure of the carbon dioxide. This can be achieved by continuously pumping out the carbon dioxide in a vacuum = according to patent 5i8,205 - according to the present invention by continuously flushing out the carbon dioxide with an inert gas stream during the thermal decomposition of the carbonate mixture. This gas flow has the effect that the carbon dioxide cannot exceed a minimal partial pressure, so that it is released from the decomposable components of the mixture even at relatively low temperatures. The effect achieved is particularly good if the inert gas stream is allowed to sweep over or through the material to be annealed at greatly reduced pressure. Exemplary embodiment A carbonate mixture, e.g. B. 5 g Bariumcarbonät 1 and 8 mg radiumcarbonate is treated at 8oo ° in a nitrogen or hydrogen stream for several hours. The barium oxide formed is then separated from the undecomposed radium carbonate by washing with hot water. The gas stream can be passed over under atmospheric pressure, but the annealing process is shortened considerably if the auxiliary gas stream is allowed to flow with constant pumping at greatly reduced pressure.

Die Ausbeute an reinem Radiumcarbonat beträgt nach dreistündigem Glühen etwa 8o % des gesamten Radiumcarbonats.The yield of pure radium carbonate is after three hours of calcination about 80% of the total radium carbonate.

Claims (1)

PATENTANSPRUCH: Gewinnung reiner radioaktiver Substanzen aus diese enthaltenden Carbonatgemischen, z. B. Barium-Radium-Carbonaten, gekennzeichnet durch thermische Zersetzung der das Radiumcarbonat begleitenden Verbindungen unter Hindurchleiten eines indifferenten Gasstromes und anschließendes Auswaschen der gebildeten Oxyde.PATENT CLAIM: Extraction of pure radioactive substances from them containing carbonate mixtures, e.g. B. barium radium carbonates, characterized by thermal decomposition of the compounds accompanying the radium carbonate while being passed through an inert gas stream and subsequent washing out of the oxides formed.
DE1930572356D 1930-08-21 1930-08-21 Process for the extraction of radioactive substances Expired DE572356C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE572356T 1930-08-21

Publications (1)

Publication Number Publication Date
DE572356C true DE572356C (en) 1933-03-15

Family

ID=6569047

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930572356D Expired DE572356C (en) 1930-08-21 1930-08-21 Process for the extraction of radioactive substances

Country Status (1)

Country Link
DE (1) DE572356C (en)

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