DE454862C - Process for the production of high percentage, non-molten, highly active lead oxide - Google Patents
Process for the production of high percentage, non-molten, highly active lead oxideInfo
- Publication number
- DE454862C DE454862C DEC38886D DEC0038886D DE454862C DE 454862 C DE454862 C DE 454862C DE C38886 D DEC38886 D DE C38886D DE C0038886 D DEC0038886 D DE C0038886D DE 454862 C DE454862 C DE 454862C
- Authority
- DE
- Germany
- Prior art keywords
- lead
- lead oxide
- highly active
- production
- molten
- 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
- 229910000464 lead oxide Inorganic materials 0.000 title claims description 12
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- MFEVGQHCNVXMER-UHFFFAOYSA-L 1,3,2$l^{2}-dioxaplumbetan-4-one Chemical compound [Pb+2].[O-]C([O-])=O MFEVGQHCNVXMER-UHFFFAOYSA-L 0.000 claims description 7
- 229910000003 Lead carbonate Inorganic materials 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 229910000004 White lead Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G21/00—Compounds of lead
- C01G21/02—Oxides
- C01G21/06—Lead monoxide [PbO]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
Verfahren zur Herstellung von hochprozentigem, nicht geschmolzenem, hochaktivem Bleioxyd. Die bekannten Verfahren zur Herstellung von Bleioxyd aus Bleicarbonat, bei denen das Bleioxyd dann wiederum zu Bleimennige oxydiert wird, liefern ein Bleioxyd, welches sich nur sehr schwer in Bleimennige überführen läßt. Man hat in der Technik deshalb bisher das Oxyd, welches man auf Mennige verarbeiten will, nicht aus Bleicarbonat hergestellt, sondern entweder aus Bleiweiß oder dadurch, daß man metallisches Blei der Einwirkung der atmosphärischen Luft unterwirft. Man hat zwar vorgeschlagen, über Nitritglätte zu Mennige zu gelangen; dieses Verfahren ist jedoch infolge der synthetischen Herstellung von Natriumnitrat so gut wie ganz verschwunden.Process for the production of high percentage, unmelted, highly active lead oxide. The known processes for the production of lead oxide from lead carbonate, in which the lead oxide is then in turn oxidized to red lead, provide a lead oxide, which is very difficult to convert into red lead. One has in technology therefore up to now the oxide which one wants to process on red lead has not been made from lead carbonate made, but either from white lead or by using metallic lead subject to the action of the atmospheric air. It has been suggested to get to red lead via nitrite smoothness; however, this procedure is due to the synthetic production of sodium nitrate has almost completely disappeared.
Es hat sich nun gezeigt und darin besteht die Erfindung, daß sich ein hochprozentiges, nicht geschmolzenes, hochaktives Bleioxyd herstellen läßt, wenn man Bleicarbonat in einem drehbaren Vakuumofen erhitzt. Dieser kann entweder von innen oder von außen beheizt werden. Zweckmäßig verwendet man solche Vakuumöfen, in denen man gleichzeitig ein Teil- oder Vollvakuum erzeugen kann.It has now been shown and that is the invention that can produce a high percentage, non-melted, highly active lead oxide, when heating lead carbonate in a rotating vacuum oven. This can either be heated from the inside or outside. It is advisable to use such vacuum furnaces, in which you can create a partial or full vacuum at the same time.
Diese Arbeitsweise bietet technische Vorteile. Die in der gewöhnlichen Weise hergestellten technischen Bleioxyde erfordern eine .Oxydationsdauer von i o bis 15 Stunden, um in Mennige überzugehen.This way of working offers technical advantages. The technical lead oxides produced in the usual way require an oxidation time of 10 to 15 hours in order to convert to red lead.
Das nach dem vorliegenden Verfahren hergestellte Bleioxyd wird innerhalb weniger Stunden in Bleimennige übergeführt, so daß das entstehende Bleioxyd mit Recht als hochaktiv anzusprechen ist.The lead oxide produced by the present process is within converted into red lead a few hours, so that the resulting lead oxide with Law is to be addressed as highly active.
Es war nicht ohne weiteres vorauszusehen, daß in einem Vakuumdrehofen Bleicarbonat, ohne zum Schmelzen zu gelangen, in ein hochaktives Bleioxyd übergeführt werden konnte. Versuche zeigten aber, daß infolge des Vakuums die Zersetzungstemperatur des Bleicarbonats nicht wesentlich über 29o° steigt. Außer dieser Temperaturerniedrigung tritt ein explosionsartiges Freiwerden von Kohlensäure ein, die bedingt, daß das entstehende Bleioxyd in. voluminöser poröser Masse zurückbleibt, ohne auch nur die geringsten Anzeichen einer Sinterung in Erscheinung treten zu lassen.It was not easy to foresee that in a vacuum rotary kiln Lead carbonate converted into a highly active lead oxide without melting could be. Experiments showed, however, that the decomposition temperature was due to the vacuum of lead carbonate does not rise significantly above 29o °. Except for this drop in temperature an explosive release of carbonic acid occurs, which causes the resulting lead oxide remains in voluminous porous mass, without even the to show the slightest signs of sintering.
Praktisch wird das Verfahren so ausgeführt, daß man in einem drehbaren Ofen, in dem -man ein Vakuum erzeugen kann, das zu reduzierende Bleicarbonat hineinbringt. Die Beheizung kann entweder von innen dadurch erreicht werden, daß man elektrischen Strom in Wärmeenergie in Heizwiderständen umsetzt, oder dadurch, daß man den Ofen von außen beheizt.In practice, the process is carried out so that one in a rotatable Furnace in which a vacuum can be created, which brings in lead carbonate to be reduced. The heating can either be achieved from the inside by electrical current converts it into thermal energy in heating resistors, or by doing so, that the furnace is heated from the outside.
Da die Umsetzungstemperatur nur etwa 3oo° beträgt, so kann man die drehbare Vakuumtrommel sehr vorteilhaft direkt beheizen, sei es durch Kohle- oder durch Gäsbeheizung.Since the reaction temperature is only about 3oo °, so you can Direct heating of the rotatable vacuum drum is very advantageous, be it with coal or through gas heating.
Die Reaktion ist beendet, wenn das ursprüngliche Hochvakuunx, welches -vor. der Reaktion in dem Vakuumgefäß erzeugt war, nach eintretender Reaktion, die ein Sinken des Vakuums bedingt, wiederhergestellt ist.The reaction is complete when the original high vacuum, which -before. the reaction was generated in the vacuum vessel after the reaction had occurred a decrease in the vacuum is restored.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEC38886D DE454862C (en) | 1926-10-26 | 1926-10-26 | Process for the production of high percentage, non-molten, highly active lead oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEC38886D DE454862C (en) | 1926-10-26 | 1926-10-26 | Process for the production of high percentage, non-molten, highly active lead oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE454862C true DE454862C (en) | 1928-01-18 |
Family
ID=7023495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEC38886D Expired DE454862C (en) | 1926-10-26 | 1926-10-26 | Process for the production of high percentage, non-molten, highly active lead oxide |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE454862C (en) |
-
1926
- 1926-10-26 DE DEC38886D patent/DE454862C/en not_active Expired
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