AT99192B - Process for the production of alumina. - Google Patents

Process for the production of alumina.

Info

Publication number
AT99192B
AT99192B AT99192DA AT99192B AT 99192 B AT99192 B AT 99192B AT 99192D A AT99192D A AT 99192DA AT 99192 B AT99192 B AT 99192B
Authority
AT
Austria
Prior art keywords
hydrochloric acid
aluminum chloride
alumina
production
solution
Prior art date
Application number
Other languages
German (de)
Original Assignee
Griesheim Elektron Chem Fab
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 Griesheim Elektron Chem Fab filed Critical Griesheim Elektron Chem Fab
Application granted granted Critical
Publication of AT99192B publication Critical patent/AT99192B/en

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  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

  

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  Verfahren zur Herstellung von Tonerde. 
 EMI1.1 
 

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   Ferner hat man vorgeschlagen, die mit Salzsäure sehr stark gesättigte Lauge von den   ausgeschie-   denen Aluminiumehloridkristallen durch Verdrängen mit konzentrierter Aluminiumchloridlösung, die   zweckmässigerweise   von unten in die mit Salzsäure gesättigte   kristallhaItigeLauge   eingepresst wird, zu trennen. 



   Der nach vorliegendem Verfahren nur durch Eindampfen ohne Mitwirkung von Salzsäure gewonnene dicke Salzbrei ist gut filtrierbar und liefert nur eine verhältnismässig geringe Menge nicht oder schwach saurer Mutterlauge. 



   PATENT-ANSPRÜCHE :
1. Verfahren zur Herstellung von Tonerde aus tonerdehaltigen Rohstoffen durch Lösen des Ausgangsmaterials in   Salzsäure, Ausscheiden des Aluminiumchlorids   in Kristallform, Waschen der Kristalle und Erhitzen derselben unter   Salzsäureabspaltung,   dadurch gekennzeichnet, dass die Abseheidung der Aluminiumchloridkristalle durch Eindampfen eines Teiles der Aufschlusslösung bewirkt wird und das Waschen dieser Kristalle zunächst mit einer Lösung von Aluminiumchlorid und Salzsäure und dann mit reiner eisenfreier Salzsäure allein, erfolgt.



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  Process for the production of alumina.
 EMI1.1
 

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   It has also been proposed that the alkali, which is very strongly saturated with hydrochloric acid, be separated from the precipitated aluminum chloride crystals by displacement with concentrated aluminum chloride solution, which is expediently pressed into the crystal-containing alkali saturated with hydrochloric acid from below.



   The thick salt paste obtained according to the present process only by evaporation without the involvement of hydrochloric acid can be filtered easily and provides only a relatively small amount of non-acidic or weakly acidic mother liquor.



   PATENT CLAIMS:
1. A process for the production of alumina from raw materials containing alumina by dissolving the starting material in hydrochloric acid, precipitating the aluminum chloride in crystal form, washing the crystals and heating them with elimination of hydrochloric acid, characterized in that the separation of the aluminum chloride crystals is effected by evaporation of part of the digestion solution and that Washing of these crystals is done first with a solution of aluminum chloride and hydrochloric acid and then with pure iron-free hydrochloric acid alone.

Claims (1)

2. Verfahren nach Anspruch 1. unter Ausnutzung der bei der thermischen Zerlegung des Aluminiumchlorids freiwerdenden Salzsäure, dadurch gekennzeichnet, dass man in den nicht eingedampften Teil der ursprünglichen Aufschlusslösung das bei der Zersetzung des Aluminiumehlorids entweichende Salzsäurewasserdampfgemisch einleitet und mit dieser Lösung die durch Eindampfen erhaltenen Aluminium- EMI2.1 2. The method according to claim 1, utilizing the hydrochloric acid released during the thermal decomposition of the aluminum chloride, characterized in that the hydrochloric acid water vapor mixture escaping during the decomposition of the aluminum chloride is introduced into the non-evaporated part of the original digestion solution and the aluminum obtained by evaporation is introduced with this solution - EMI2.1
AT99192D 1922-07-01 1922-07-01 Process for the production of alumina. AT99192B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT99192T 1922-07-01

Publications (1)

Publication Number Publication Date
AT99192B true AT99192B (en) 1925-02-10

Family

ID=3618458

Family Applications (1)

Application Number Title Priority Date Filing Date
AT99192D AT99192B (en) 1922-07-01 1922-07-01 Process for the production of alumina.

Country Status (1)

Country Link
AT (1) AT99192B (en)

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