DE502677C - Process for the production of chlorine-free lead carbonate - Google Patents

Process for the production of chlorine-free lead carbonate

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Publication number
DE502677C
DE502677C DEC39701D DEC0039701D DE502677C DE 502677 C DE502677 C DE 502677C DE C39701 D DEC39701 D DE C39701D DE C0039701 D DEC0039701 D DE C0039701D DE 502677 C DE502677 C DE 502677C
Authority
DE
Germany
Prior art keywords
chlorine
production
carbon dioxide
lead
lead carbonate
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
DEC39701D
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.)
CHEMICAL AND METALLURG CORP LT
Original Assignee
CHEMICAL AND METALLURG CORP LT
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 CHEMICAL AND METALLURG CORP LT filed Critical CHEMICAL AND METALLURG CORP LT
Application granted granted Critical
Publication of DE502677C publication Critical patent/DE502677C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G21/00Compounds of lead
    • C01G21/14Carbonates

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Description

Verfahren zur Herstellung von chlorfreiem Bleicarbonat In den Patent ..183 877 ist ein Verfahren zur Überführung von Bleichlorid in Bleicarbonat und dessen Anwendung zur Gewinnung von Blei aus Erzen. Rückständen u. dgl. beschrieben. Dieses Verfahren besteht darin, daß Bleichlorid, das nach bekannten Extraktionsverfahren aus Erzen, Aufbereitungsprodukten, Rückständen u. dgl. gewonnen ist, in einer Ammoniaklösung suspendiert wird, in die Kolilendioxvd eingeleitet wird; das Bleichlorid wird hierdurch in Bleicarbonat übergeführt.Process for the production of chlorine-free lead carbonate In the patent ..183 877 is a process for converting lead chloride into lead carbonate and its use for the extraction of lead from ores. Residues and the like. This process consists in the use of lead chloride, which is obtained by known extraction processes is obtained from ores, processing products, residues and the like, in an ammonia solution is suspended, is introduced into the Kolilendioxvd; the lead chloride is thereby converted into lead carbonate.

Es wurde nun gefunden, daß bei diesen Verfahren ein Blencarbonat mit geringstem Gehalt an Bleichlorid erhalten werden kann, wenn das Verfahren so geleitet wird, daß das Kohlendioxyd mit möglichster Annäherung in gleichem Maße in Bleicarbonat übergeht, wie es in die Suspension eingeleitet wird.It has now been found that in this process, a blen carbonate with The lowest lead chloride content can be obtained if the process is so directed becomes that the carbon dioxide with the closest approximation in equal measure in lead carbonate passes over how it is introduced into the suspension.

Dieser Zweck der Erfindung wird erreicht, indem das Kohlendioxyd in die Suspension mit: einer Geschwindigkeit eingeleitet wird, die nicht merklich größer ist als die Absorptionsgeschwindigkeit des Kohlendioxyds durch die vorhandenen Bleiverbindungen, <1.1i. rlaß die Anwesenheit von freiem Kohlendioxvd in der Flüssigkeit nach Möglichkeit vermieden wird.This purpose of the invention is achieved by removing the carbon dioxide in the suspension is introduced at a rate that is not noticeably greater is the rate of absorption of carbon dioxide by the lead compounds present, <1.1i. Let the presence of free carbon dioxide in the liquid if possible is avoided.

Beispielsweise werden 275 kg Amnioniaklfisung von 2o.8"/". 129 kg Wasser und .I53 h-Bleichlorid bei gewöhnlicher Temperatur Stunde im Druckgefäß gerührt. Hierauf wird Kohlendioxyd mit der höchsten Geschwindigkeit eingeleitet, bei der die Kohlendioxydkonzentration der Flüssigkeit nicht über o,3°(" steigt; diese Konzentration wird während des Einleitens von Zeit zu Zeit an entnommenen Proben festgestellt. Die Temperatur der Flüssigkeit steigt auf etwa 8o°, der Druck im Gefäß auf etwa 2,35 Atm.; diese beiden Zahlen sind Höchstwerte. Nach vierstündiger Kolilendioxvdbehandlung unter den vorstehenden Bedingungen zeigt die Analyse einer Probe vollkommene Umwandlung. Der Rückstand wird hierauf durch Filtration von der Flüssigkeit getrennt und das Bleicarbonat mit Wasser gewaschen; es enthält weniger als o,i°/o Chlorid.For example, 275 kg of amniotic fluid becomes 2o.8 "/". 129 kg of water and .I53 h-lead chloride at normal temperature for one hour in a pressure vessel. Carbon dioxide is then introduced at the highest rate at which the carbon dioxide concentration of the liquid does not rise above 0.3 ° ("; this concentration is determined from time to time on samples taken during the introduction. The temperature of the liquid rises to about 80 °, the pressure in the vessel is about 2.35 atmospheres. These two figures are maximum values. After four hours of treatment with colylenedioxide under the above conditions, analysis of a sample shows complete conversion. The residue is then separated from the liquid by filtration and the lead carbonate is washed with water; it contains less than 0.1 per cent chloride.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von chlorfreiem Bleicarbonat durch Einleiten von Kohlendioxyd in eine Suspension von Bleichlorid in einer wässerigen Aminoniaklösung bis zur vollständigen Umwandlung des Chlorid in Carbonat nach dem durch Patent :483 877 geschützten Verfahren, dadurch gekennzeichnet, daß durch Regulierung der Geschwindigkeit des eingeleiteten Kohlendioxyds die Konzentration des Kohlendioxyds in der Lösung 0.3"J" nicht überschreitet.PATENT CLAIM: Process for the production of chlorine-free lead carbonate by introducing carbon dioxide into a suspension of lead chloride in an aqueous one Aminoniaklösung up to the complete conversion of the chloride into carbonate after Process protected by patent: 483 877, characterized in that by regulation the speed of the introduced carbon dioxide the concentration of the carbon dioxide does not exceed 0.3 "J" in the solution.
DEC39701D 1926-07-02 1927-04-24 Process for the production of chlorine-free lead carbonate Expired DE502677C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB502677X 1926-07-02

Publications (1)

Publication Number Publication Date
DE502677C true DE502677C (en) 1930-07-14

Family

ID=10455296

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC39701D Expired DE502677C (en) 1926-07-02 1927-04-24 Process for the production of chlorine-free lead carbonate

Country Status (1)

Country Link
DE (1) DE502677C (en)

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