DE714780C - Process for extracting metallic barium by thermal reduction of starting materials containing barium oxide - Google Patents
Process for extracting metallic barium by thermal reduction of starting materials containing barium oxideInfo
- Publication number
- DE714780C DE714780C DEI58505D DEI0058505D DE714780C DE 714780 C DE714780 C DE 714780C DE I58505 D DEI58505 D DE I58505D DE I0058505 D DEI0058505 D DE I0058505D DE 714780 C DE714780 C DE 714780C
- Authority
- DE
- Germany
- Prior art keywords
- barium
- starting materials
- barium oxide
- materials containing
- thermal reduction
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
Description
Verfahren zum Gewinnen von metallischem Barium durch thermische Reduktion von Bariumoxyd enthaltenden Ausgangsstoffen Als Reduktionsmittel für die thermische Gewinnung von Barium im Laboratoriumsmaßstab aus Bariumoxyd enthaltenden Rohstoffen sind vor allem Aluminium oder Silizium in Vorschlag gebracht worden, während sich Kohle wegen der Reoxydationsgefahr des gebildeten Bariums durch das entstandene Kohlenoxyd nicht bewährt hat.Process for obtaining metallic barium by thermal reduction of starting materials containing barium oxide As reducing agents for thermal Extraction of barium on a laboratory scale from raw materials containing barium oxide Especially aluminum or silicon have been suggested while themselves Coal because of the risk of reoxidation of the barium formed by the resulting Carbon oxide has not proven effective.
Die Reduktion mit Aluminium oder Silizium verläuft nicht, wie zunächst vermutet werden könnte, gemäß den Gleichungen 3 Ba O +:2A1 = A1,03 + 3 Ba bzw. The reduction with aluminum or silicon does not proceed , as might initially be assumed, according to the equations 3 Ba O +: 2A1 = A1,03 + 3 Ba or
2 Ba 0 -j- Si = Si 02 -f - 2 Ba, , sondern geht, wie gefunden wurde, etwa mach folgenden Gleichungen vor sich: 4 Ba O + 2A1 = Ba O #A12 03 + 3 Ba bzw. a Ba O + Si = 2 Ba O . Si 02 -T- 2 Ba.2 Ba 0 -j- Si = Si 02 -f - 2 Ba, but goes, as was found, make the following equations: 4 Ba O + 2A1 = Ba O # A12 03 + 3 Ba or a Ba O + Si = 2 Ba O. Si 02 -T- 2 Ba.
Aus diesem Grunde ist es notwendig, das Bariumoxyd in einem Überschuß über die auf Grund der zunächst anzunehmenden Gleichungen zu errechnende Menge anzuwenden. Es wird daher gemäß den letztgenannten beiden Gleichungen die Zusammensetzung der Reaktionsgemische so gewählt, daß bei Anwendung von Silizium das Molverhältni des Bariumoxyds zum Silizium etwa 4: 1, bei Anwendung von Aluminium das Molverhältnis des Bariumoxvds zu letzterem etwa 4 : 2 beträgt.For this reason it is necessary to use an excess of barium oxide about the amount to be calculated on the basis of the equations to be initially assumed. It is therefore according to the last-mentioned two equations, the composition of the Reaction mixtures chosen so that when using silicon, the molar ratio of the Barium oxide to silicon about 4: 1, when using aluminum the molar ratio of the barium oxide to the latter is about 4: 2.
Die Reaktionsgeschwindigkeit der Gemische kann durch Zusatz von Alkali- oder Erdalkalifluoriden, insbesondere Bariumfluorid, in Mengen zwischen o,5 und 5 Gewichtsprozent, vorzugsweise 2. Gewichtsprozent, zum Reaktionsgemisch erheblich gesteigert werden.The reaction rate of the mixtures can be increased by adding alkali or alkaline earth fluorides, especially barium fluoride, in amounts between 0.5 and 5 percent by weight, preferably 2. percent by weight, to the reaction mixture considerably can be increased.
Beispiel i Ein Gemisch von 64o Gewichtsteilen Bariunioxyd (96°/oig) und 54 Gewichtsteilen Aluminiumgrieß wurde in einen Röhrenofen eingesetzt und im Vakuum bei 1300' während 2 Stunden der Reaktion überlassen. Das flüssig verdichtete und außerhalb der Heizzone in einen nicht beheizten Behälter abgegossene Bariummetall wurde unter Luftzutritt aus dem Ofen entfernt. Beispiel 2 Ein gepreßtes Gemisch von 64.o Gewichtsteilen Bariumoxyd (96°/oig), 3o Gewichtsteilen Ferrosilizium (93%ig) und to Gewichtsteilen Bariumfluorid wurde wie im Beispiel r im Ofen behandelt und anschließend das Bariummetall unter Überleiten eines Wasserstoffstromes aus dem Ofen entfernt.EXAMPLE i A mixture of 64o parts by weight of barium oxide (96%) and 54 parts by weight of aluminum powder was placed in a tube furnace and left to react in a vacuum at 1300 ° for 2 hours. The barium metal, which was compacted in liquid form and poured into an unheated container outside the heating zone, was removed from the furnace with admission of air. EXAMPLE 2 A pressed mixture of 64 parts by weight of barium oxide (96%), 30 parts by weight of ferrosilicon (93%) and 1 parts by weight of barium fluoride was treated in the furnace as in Example r and then the barium metal was removed from the furnace while a stream of hydrogen was passed over it .
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI58505D DE714780C (en) | 1937-01-10 | 1937-01-10 | Process for extracting metallic barium by thermal reduction of starting materials containing barium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI58505D DE714780C (en) | 1937-01-10 | 1937-01-10 | Process for extracting metallic barium by thermal reduction of starting materials containing barium oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE714780C true DE714780C (en) | 1941-12-06 |
Family
ID=7194794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEI58505D Expired DE714780C (en) | 1937-01-10 | 1937-01-10 | Process for extracting metallic barium by thermal reduction of starting materials containing barium oxide |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE714780C (en) |
-
1937
- 1937-01-10 DE DEI58505D patent/DE714780C/en not_active Expired
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