DE501391C - Digestion of chrome ores - Google Patents

Digestion of chrome ores

Info

Publication number
DE501391C
DE501391C DEF59650D DEF0059650D DE501391C DE 501391 C DE501391 C DE 501391C DE F59650 D DEF59650 D DE F59650D DE F0059650 D DEF0059650 D DE F0059650D DE 501391 C DE501391 C DE 501391C
Authority
DE
Germany
Prior art keywords
digestion
chrome
chrome ore
residue
chrome ores
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
DEF59650D
Other languages
German (de)
Inventor
Dr-Ing Paul Weise
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEF59650D priority Critical patent/DE501391C/en
Application granted granted Critical
Publication of DE501391C publication Critical patent/DE501391C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/14—Chromates; Bichromates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Aufschließen von Chromerzen Beim Aufschluß von Chromerz mit Soda wird ein Laugenrückstand erhalten, der aus unaufgeschlossenem Chromerz, Tonerde, Magnesium und Eisenoxyd besteht. Um nun das unaufgeschlossene Chromerz von den Beimengungen zu trennen, können zunächst mechanische Wege eingeschlagen werden, wie Schlämm-oder Sortierverfahren. Es zeigte sich jedoch, daß der vorteilhafteste Weg nicht der mechanische, sondern der chemische ist. -Dabei gelingt es, durch Behandeln der Rückstände mit verdünnter Säure, ein von den Beimengungen fast vollständig befreites Chromerz zu erhalten. Wesentlich hierfür aber ist es, die Konzentration der Säure nicht zu hoch zu nehmen. Besonders günstig sind Säuren bis zu etwa 30°/0. Eine mäßige Erwärmung der Säure ist votreilhaft, doch empfiehlt es sich, nicht wesentlich über 6o° hinauszugehen. Unter den angegebenen Bedingungen wird ein gut filtrierbarer Rückstand erhalten. Beispiel Die beim Chromerzaufschluß mit Soda erhaltene Schmelze wird mit Wasser ausgelaugt, - filtriert, gewaschen und der Rückstand mit so viel 15%iger Schwefelsäure von 50° C versetzt, bis alle Verunreinigungen gelöst sind. Nach dem Filtrieren und Waschen des zurückgewonnenen Erzes kann dieses wieder in den Prozeß zurückkehren.Digestion of chrome ores When digesting chrome ore with soda is a lye residue obtained from undigested chrome ore, clay, magnesium and iron oxide. Now about the undigested chrome ore from the admixtures To separate, mechanical paths can first be taken, such as slurry or Sorting process. It turned out, however, that the most advantageous way is not the mechanical, but the chemical is. -This succeeds by treating the residue with dilute acid, a chrome ore almost completely freed from the admixtures obtain. For this, however, it is essential that the concentration of the acid is not too high gain weight. Acids up to about 30% are particularly favorable. Moderate warming the acidity is perfect, but it is advisable not to go much beyond 60 °. An easily filterable residue is obtained under the stated conditions. EXAMPLE The melt obtained during the digestion of chrome ore with soda is mixed with water leached, - filtered, washed and the residue with as much 15% sulfuric acid of 50 ° C until all impurities are dissolved. After filtering and Washing the recovered ore can put it back into the process.

Claims (1)

PATI:NTANSPRUCFI: Verfahren zur Rückgewinnung des Chromerzes aus dem beim Aufschluß von Chromerz mit Soda nach dem Laugen verbleibenden Rückstande, dadurch gekennzeichnet, daß man diesen Rückstand mit verdünnten, zweckmäßig erwärmten Säuren, insbesondere Schwefelsäure behandelt.PATI: NTANSPRUCFI: Process for the recovery of chrome ore from the residues remaining in the digestion of chrome ore with soda after leaching, thereby characterized that this residue with dilute, appropriately warmed acids, treated in particular sulfuric acid.
DEF59650D 1925-08-25 1925-08-25 Digestion of chrome ores Expired DE501391C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF59650D DE501391C (en) 1925-08-25 1925-08-25 Digestion of chrome ores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF59650D DE501391C (en) 1925-08-25 1925-08-25 Digestion of chrome ores

Publications (1)

Publication Number Publication Date
DE501391C true DE501391C (en) 1930-07-02

Family

ID=7108861

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF59650D Expired DE501391C (en) 1925-08-25 1925-08-25 Digestion of chrome ores

Country Status (1)

Country Link
DE (1) DE501391C (en)

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