DE359975C - Process for obtaining low-iron alums - Google Patents

Process for obtaining low-iron alums

Info

Publication number
DE359975C
DE359975C DER50526D DER0050526D DE359975C DE 359975 C DE359975 C DE 359975C DE R50526 D DER50526 D DE R50526D DE R0050526 D DER0050526 D DE R0050526D DE 359975 C DE359975 C DE 359975C
Authority
DE
Germany
Prior art keywords
iron
aluminum
obtaining low
alums
digestion
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
DER50526D
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.)
Honeywell Riedel de Haen AG
Original Assignee
JD Riedel 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 JD Riedel AG filed Critical JD Riedel AG
Priority to DER50526D priority Critical patent/DE359975C/en
Application granted granted Critical
Publication of DE359975C publication Critical patent/DE359975C/en
Expired legal-status Critical Current

Links

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

Landscapes

  • 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)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Compounds Of Iron (AREA)

Description

Verfahren zur Gewinnung von eisenarmen Alaunen. Der Aufschluß von Tonen und Kaolinen kann bekanntlich in der Weise erfolgen, daß die Gemische dieser Substanzen mit Sch-,vefelsäure, Sulfaten oder Bisulfaten auf höhere Temperatur erhitzt werden. Hierbei wird bei AnwendungvonAmmoniumsulfat (vgl. Patentschrift 198707 der K1. 12 m) auf eine Temperatur von q.00° erhitzt, um einen vollständigen Aufschluß unter Bildung von Aluminiumsulfat herbeizuführen. Das erhaltene Aluminiumsulfat bzw. der erhaltene Alaun ist hierbei durch das in 'den Mineralien enthaltene Eisen stark verunreinigt.Process for the extraction of low-iron alums. It is known that clays and kaolins can be broken down in such a way that the mixtures of these substances with sulfuric acid, sulfuric acid, sulfates or bisulfates are heated to a higher temperature. When using ammonium sulphate (cf. patent specification 1 98707 of K1. 12 m), heating is carried out to a temperature of q.00 ° in order to bring about complete digestion with the formation of aluminum sulphate. The aluminum sulfate obtained or the alum obtained is heavily contaminated by the iron contained in the minerals.

Es wurde nun gefunden, daß sich der Prozeß unter bestimmten Bedingungen derartig leiten läßt, däß sich in der aufgeschlossenen Masse das Verhältnis zwischen Aluminium und Eisen zugunsten des ersteren verschiebt. Dies wird dadurch erreicht, daß man bei niedrigeren Temperaturen und mit kürzerer Aufschlußzeit arbeitet, als es zur restlosen Erfassung des Aluminiums erforderlich wäre.It has now been found that the process can take place under certain conditions can be guided in such a way that in the open-minded crowd the relationship between Aluminum and iron shifts in favor of the former. This is achieved by that one works at lower temperatures and with a shorter digestion time than it would be necessary for the complete detection of the aluminum.

Um späterhin dennoch eine quantitative Ausbeute an Aluminium zu erzielen, kann der Prozeß unter gleichen Bedingungen wiederholt werden. Es wird auf diese Weise eine Art fraktionierten Aufschlusses durchgeführt, ohne daß gleichzeitig das gesamte Eisen in Sulfat übergeführt wird.In order to still achieve a quantitative yield of aluminum later, the process can be repeated under the same conditions. It will be based on this Way, a kind of fractional digestion is carried out without the all iron is converted to sulphate.

Die Wirkungsweise des Verfahrens erläutern folgende Vergleichsversuche: io kg eines Aluminium- und Eisenoxyd im Verhältnis ioo : 16,6 enthaltenden Kaolins werden 8 Stunden mit 25 kg Ammoniumsulfat auf 36o° erhitzt. Im wäßrigen Auszug befinden sich Aluminium- und Eisenoxyd im Verhältnis von zoo : 10,q..The following comparative experiments explain how the process works: 10 kg of a kaolin containing aluminum and iron oxide in a ratio of 100: 16.6 are heated to 36o ° with 25 kg of ammonium sulfate for 8 hours. Located in the aqueous extract aluminum and iron oxide in a ratio of zoo: 10, q ..

Wird die gleiche Menge obigen Kaolins 6 Stunden mit 25 kg Ammoniumsulfat auf höchstens 33o° erhitzt, so enthält der wäßrige Auszug das Aluminium- und Eisenoxyd im Verhältnis von 100 : 4,7-Use the same amount of the above kaolin for 6 hours with 25 kg of ammonium sulfate When heated to a maximum of 330 °, the aqueous extract contains the aluminum and iron oxides in the ratio of 100: 4.7-

Claims (1)

PATENT-ANSPRUCH: Verfahren zur Gewinnung von eisenarmen Alaunen, dadurch gekennzeichnet, daß man zum Aufschließen des Tonerdeminerals mittels Schwefelsäure, Sulfate und Bisulfate Temperaturen und Aufschlußzenten wählt, welche unterhalb der zum völligen Aufschluß des Aluminiums nötigen Temperaturen und Zeiten liegen.PATENT CLAIM: Process for the extraction of low-iron alums, thereby characterized in that for the digestion of the clay mineral by means of sulfuric acid, Sulphates and bisulphates select temperatures and digestion rates which are below the temperatures and times necessary for the complete digestion of the aluminum.
DER50526D 1920-06-27 1920-06-27 Process for obtaining low-iron alums Expired DE359975C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER50526D DE359975C (en) 1920-06-27 1920-06-27 Process for obtaining low-iron alums

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER50526D DE359975C (en) 1920-06-27 1920-06-27 Process for obtaining low-iron alums

Publications (1)

Publication Number Publication Date
DE359975C true DE359975C (en) 1922-09-28

Family

ID=7408896

Family Applications (1)

Application Number Title Priority Date Filing Date
DER50526D Expired DE359975C (en) 1920-06-27 1920-06-27 Process for obtaining low-iron alums

Country Status (1)

Country Link
DE (1) DE359975C (en)

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