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DE931528C - Process for obtaining high-purity aluminum sulphate crystals - Google Patents

Process for obtaining high-purity aluminum sulphate crystals

Info

Publication number
DE931528C
DE931528C DEK4744D DEK0004744D DE931528C DE 931528 C DE931528 C DE 931528C DE K4744 D DEK4744 D DE K4744D DE K0004744 D DEK0004744 D DE K0004744D DE 931528 C DE931528 C DE 931528C
Authority
DE
Germany
Prior art keywords
aluminum sulphate
obtaining high
purity aluminum
sulphate crystals
alumina
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
DEK4744D
Other languages
German (de)
Inventor
Hermann Dr Kretzschmar
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEK4744D priority Critical patent/DE931528C/en
Application granted granted Critical
Publication of DE931528C publication Critical patent/DE931528C/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
    • C01F7/743—Preparation from silicoaluminious materials, e.g. clays or bauxite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion 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 Aluminiumsulfatkristallen hoher Reinheit Um kristallisiertes Aluminiumsulfat aus' Alhaltigen Stoffen und Schwefelsäure herzustellen, bedarf es gemäß Patent 74q.8ig einer besonderen, zeitweise unterbrochenen Vakuumkristallisation. Dabei geht man von Ton-Schwefelsäureaufschlußlaugen aus und nimmt den Zusatz von Frischlauge zu Beginn der Kristallbildung in einem Zuge vor. Dieses Verfahren geht von der Erkenntnis aus, daß reines Aluminiumsulfat aus den Tonaufschlußlaugen gewonnen wird, wenn durch vorübergehende Änderung der Laugenkonzentration die Sättigung der eindampfenden Lösung unterbrochen und somit eine gleichzeitige Ausscheidung von Kolloiden vermieden wird.Process for the production of aluminum sulphate crystals of high purity To produce crystallized aluminum sulphate from substances containing aluminum and sulfuric acid, According to patent 74q.8ig, a special, temporarily interrupted vacuum crystallization is required. It starts with clay-sulfuric acid digestion liquors and adds Fresh liquor at the start of crystal formation in one go. This procedure works based on the knowledge that pure aluminum sulphate is obtained from clay digestion liquors when the saturation of the evaporating solution interrupted and thus a simultaneous excretion of Colloids is avoided.

Es wurde nun gefunden, daß dieses Verfahren auf andere tonerdehaltige Mineralien oder Grundstoffe als Ton sowie auch auf aluminiummetallhaltige Abfälle, welche saure, lösliche Tonerde zu bilden vermögen, Anwendung finden kann. Zu nennen sind u. a. Kaolin, Bleicherde, Bauxit, Aluminiumasche, soweit eine Aus flockung von Kolloiden zu befürchten ist.It has now been found that this process can be applied to other alumina-containing Minerals or raw materials as clay as well as waste containing aluminum metal, which are able to form acidic, soluble alumina, can be used. To call are i.a. Kaolin, fuller's earth, bauxite, aluminum ash, if there is a flocculation of colloids is to be feared.

Das so gewonnene Aluminiumsulfat hat je nach den Ausgangsstoffen einen ganz minimalen Eisengehalt oder ist eisenfrei und kann damit den höchsten Anforderungen genügen.The aluminum sulfate obtained in this way has one, depending on the starting materials very minimal iron content or is iron-free and can therefore meet the highest requirements suffice.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Aluminiumsulfatkristallen hoher Reinheit aus Aluminiumsulfat enthaltenden Lösungen durch Zusatz von Frischlauge oder Wasser oder eines Gemisches von beiden zu Beginn der Kristallbildung in einem Zuge und Eindampfen, dadurch gekennzeichnet, daß an Stelle von Ton andere tonerdehaltige Abfälle, welche saure, lösliche Tonerde zu bilden vermögen, verwendet werden. Angezogene Druckschriften: Deutsche Patentschrift Nr. 131 3i4.Claim: Process for the production of aluminum sulfate crystals of high purity from solutions containing aluminum sulfate by adding fresh liquor or water or a mixture of both at the beginning of the crystal formation in one go and evaporation, characterized in that instead of clay, other alumina-containing wastes, which acidic, soluble Ability to form alumina can be used. Referenced publications: German patent specification No. 131 3i4.
DEK4744D 1940-07-14 1940-07-14 Process for obtaining high-purity aluminum sulphate crystals Expired DE931528C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK4744D DE931528C (en) 1940-07-14 1940-07-14 Process for obtaining high-purity aluminum sulphate crystals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK4744D DE931528C (en) 1940-07-14 1940-07-14 Process for obtaining high-purity aluminum sulphate crystals

Publications (1)

Publication Number Publication Date
DE931528C true DE931528C (en) 1955-08-11

Family

ID=7210471

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK4744D Expired DE931528C (en) 1940-07-14 1940-07-14 Process for obtaining high-purity aluminum sulphate crystals

Country Status (1)

Country Link
DE (1) DE931528C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE131314C (en) *

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE131314C (en) *

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