DE376717C - Process for the extraction of ammonium alum from sulphate digestions of clay minerals - Google Patents

Process for the extraction of ammonium alum from sulphate digestions of clay minerals

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Publication number
DE376717C
DE376717C DEH80102D DEH0080102D DE376717C DE 376717 C DE376717 C DE 376717C DE H80102 D DEH80102 D DE H80102D DE H0080102 D DEH0080102 D DE H0080102D DE 376717 C DE376717 C DE 376717C
Authority
DE
Germany
Prior art keywords
extraction
digestions
sulphate
clay minerals
ammonium alum
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
DEH80102D
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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.)
LUDWIG HESS DR
Original Assignee
LUDWIG HESS 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 LUDWIG HESS DR filed Critical LUDWIG HESS DR
Priority to DEH80102D priority Critical patent/DE376717C/en
Application granted granted Critical
Publication of DE376717C publication Critical patent/DE376717C/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
    • C01F7/00—Compounds of aluminium
    • C01F7/68—Aluminium compounds containing sulfur
    • C01F7/74—Sulfates
    • C01F7/76—Double salts, i.e. compounds containing, besides aluminium and sulfate ions, only other cations, e.g. alums
    • C01F7/762—Ammonium or alkali metal aluminium sulfates
    • C01F7/765—Ammonium aluminium sulfates

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  • 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 von Ammoniumalaun aus Sulfataufschlüssen vonTonerdemineralien Man hat bisher das sich beim Aüfschluß von Aluminiumsilikaten, z. B. Ton, Kaolin, mit Sulfaten oder Bisulfaten ergebende Röstgut zwecks Gewinnung des darin enthaltenen Alauns mit Wasser ausgezogen.Process for the production of ammonium alum from sulphate digestions of clay minerals One has so far that the Aüfschluss of aluminum silicates, z. B. clay, kaolin, Roasted with sulphates or bisulphates for the purpose of extracting the contained therein Alums extracted with water.

Dabei tritt in der Praxis der Übelstand auf, daß beim Auslaugen des Röstgutes durch Hydrolyse der Sulfate in Schwefelsäure und Aluminiumhydroxyd bzw. durch Bildung basischer Aluminiumsulfate beträchtliche Mengen von aufgeschlossener Tonerde in den Kzeselsäurerückständen verbleiben.It occurs in practice the disadvantage that when leaching the Roasted food by hydrolysis of the sulfates in sulfuric acid and aluminum hydroxide or due to the formation of basic aluminum sulphates, considerable amounts of digested Clay remain in the kzeselic acid residues.

Es mußte zu diesem Zweck bisher, falls das gesamte aufgeschlossene Aluminiumoxyd erhalten werden sollte, Schwefelsäure zugesetzt werden, was eine Verteuerung des Verfahrens durch den erhöhten Verbrauch an Rohstoffen bedingt.It had to be for this purpose so far, if the entire open-minded Aluminum oxide should be obtained, sulfuric acid should be added, which makes it more expensive of the process due to the increased consumption of raw materials.

Es wurde nun gefunden, das sich an Stelle der gegenwärtig verwendeten Schwefelsäure mit sehr gutem Erfolg Ammoniumsulfat gebrauchen läßt, da durch dieses die Hydrolyse der Aluminiumsalze zurückgedrängt und eine erschöpfende Extraktion des Röstgutes herbeigeführt wird.It has now been found that in place of the currently used Sulfuric acid allows ammonium sulfate to be used with very good success because of this the hydrolysis of the aluminum salts suppressed and an exhaustive extraction of the roasted food is brought about.

Der Überschuß an Ammoniumsulfat bedeutet insofern keinen Verlust, als bei der Aluminiumgewinnung im Verlaufe des Verfahrens später an und für sich zweckmäßig Ammoniumsulfat zugesetzt wird und außerdem das überschüssige Ammoniumsulfatjederzeit zurückgewonnen werden kann. Zweckmäßig wird auch bei der praktischen Durchführung des Verfahrens das Röstgut von Anfang an unmittelbar mit den Mutterlaugen angezogen. Beispiele z. 2o kg Röstgut werden in der etwa 5fachen Menge zoprozentiger Ammoniumsulfatlösung einige Stunden heiß ausgelaugt, die Lösung filtriert und durch Kaltrühren der Alaun zur Kristallisation gebracht. Nach den Ergebnissen der Analyse wurden dem Röstgut 98 bis 99 Prozent des aufgeschlossenen Aluminiumoxyds entzogen.The excess of ammonium sulfate means no loss, than in the case of aluminum extraction later in and of itself in the course of the process appropriately ammonium sulfate is added and also the excess ammonium sulfate at any time can be recovered. It is also useful in the practical implementation of the process, the roasted material is immediately attracted to the mother liquors from the start. Examples e.g. 20 kg of roasted material are about 5 times the amount of zo percent ammonium sulfate solution Leached hot for a few hours, the solution filtered and the alum by cold stirring brought to crystallization. According to the results of the analysis, the roasted material 98 to 99 percent of the digested aluminum oxide is removed.

2. Wird statt der obengenannten zoprozentigen Ammoniumsulfatlösung eine Lösung gleichen Gehaltes, als Waschwasser aus früheren Prozessen stammend, verwendet, so gelangt man zum gleichen Ergebnis.2. Used instead of the aforementioned zo percent ammonium sulfate solution a solution of the same content as washing water from earlier processes, is used, one arrives at the same result.

Claims (1)

PATENT-ANSPRUCII: Verfahren zur Gewinnung von Ammoniumaläun aus Sulfataufschlüssen von Tonerdemineralien, dadurch gekennzeichnet, daß das Röstgut mit ammoniumsulfathaltigen Lösungen bzw. Mutterlaugen oder Waschwässern aus früheren Arbeitsgängen ausgelaugt wird.PATENT-ANSPRUCII: Process for the extraction of ammonium alum from sulphate digestions of clay minerals, characterized in that the roasted material with ammonium sulfate Solutions or mother liquors or washing waters from previous work steps leached out will.
DEH80102D 1920-02-22 1920-02-22 Process for the extraction of ammonium alum from sulphate digestions of clay minerals Expired DE376717C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH80102D DE376717C (en) 1920-02-22 1920-02-22 Process for the extraction of ammonium alum from sulphate digestions of clay minerals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH80102D DE376717C (en) 1920-02-22 1920-02-22 Process for the extraction of ammonium alum from sulphate digestions of clay minerals

Publications (1)

Publication Number Publication Date
DE376717C true DE376717C (en) 1923-06-05

Family

ID=7163628

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH80102D Expired DE376717C (en) 1920-02-22 1920-02-22 Process for the extraction of ammonium alum from sulphate digestions of clay minerals

Country Status (1)

Country Link
DE (1) DE376717C (en)

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