DE484196C - Process for the electrolytic extraction of pure aluminum in dense form from raw aluminum, alloys and the like. like - Google Patents

Process for the electrolytic extraction of pure aluminum in dense form from raw aluminum, alloys and the like. like

Info

Publication number
DE484196C
DE484196C DEA49322D DEA0049322D DE484196C DE 484196 C DE484196 C DE 484196C DE A49322 D DEA49322 D DE A49322D DE A0049322 D DEA0049322 D DE A0049322D DE 484196 C DE484196 C DE 484196C
Authority
DE
Germany
Prior art keywords
aluminum
electrolyte
dense
alloys
raw
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
DEA49322D
Other languages
German (de)
Inventor
Dr William Dupre Treadwell
Dr Julius Weber
Dr Alfred Von Zeerleder
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.)
Aluminium Industrie AG
Original Assignee
Aluminium Industrie 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 Aluminium Industrie AG filed Critical Aluminium Industrie AG
Priority to DEA49322D priority Critical patent/DE484196C/en
Application granted granted Critical
Publication of DE484196C publication Critical patent/DE484196C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/24—Refining

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Verfahren zur elektrolytischen Gewinnung von reinem Aluminium in dichter Form aus Rohaluminium, Legierungen u. dgl. In einem früherem. Patent ist ein Verfahren zur elektrolytischen Gewinnung von reinem Aluminium durch Raffmation von Rohaluminium, Aluminiumlegierungen o. dgl. beschrieben, bei dem sowohl die aus dem zu raffinierenden, Aluminium enthaltenden Gut bestehenden Anoden wie auch die Kathoden in fester Form und in senkrechter Anordnung angewendet werden unter Benutzung eines Elektrolytbades, dessen Schmelzpunkt niedriger als derjenige der Elektroden ist, und der aus Halogensalzen von Aluminium und von Alkali- undloder Erdalkalimetallen besteht. Beim Arbeiten nach diesem Verfahren ist es wichtig, den Aluminiumniederschlag auf der Kathode in möglichst dichter Form bei genügender Dicke zu erhalten. Dies wird begünstigt durch die vorliegende Erfindung. Es wurde nämlich gefunden, daß durch einen gewissen Gehalt an Elektrolyten an Fremdstoffen verschiedener Art ein Herauswachsen des Kathodenniederschlages verhindert und ein dichter Niederschlag erzielt wird. Als Zusätze, welche diese Wirkung ergeben, kommen solche Metalle oder Metallverbindungen oder Salze in Frage, die edler sind als Aluminium, und deren Abscheidungs- bzw. Auflösungspotential . in dem betreffenden Elektrolyten sich von demjenigen des Aluminiums um nicht mehr als o,6 Volt unterscheidet. Solche Metalle sind beispielsweise Mangan, Zink, Cadmium, Blei, Chrom, Zinn, Kupfer, Eisen.Process for the electrowinning of pure aluminum in dense Mold made from raw aluminum, alloys and the like. Patent is a process for the electrolytic extraction of pure aluminum by refining raw aluminum, Aluminum alloys or the like described, in which both the from the to be refined, Aluminum-containing good anodes as well as the cathodes in solid form and can be used in a vertical arrangement using an electrolyte bath, the melting point of which is lower than that of the electrodes and that of halogen salts of aluminum and of alkali and / or alkaline earth metals. At work After this process it is important to keep the aluminum deposited on the cathode in the most dense form possible with sufficient thickness. This is favored by the present invention. It was found that by a certain Content of electrolytes of foreign substances of various kinds an outgrowth of the cathode precipitate prevented and a dense precipitation is achieved. As additions which these Result, such metals or metal compounds or salts come into question, which are more noble than aluminum, and their deposition or dissolution potential. in the electrolyte in question no longer differs from that of aluminum than 0.6 volts. Such metals are, for example, manganese, zinc, cadmium, Lead, chrome, tin, copper, iron.

Diese Zusätze zum Elektrolyten können auf verschiedene Weise in ihn hineingebracht werden. Entweder werden sie ihm unmittelbar zugesetzt, oder das Metall, aus welchem das betreffende Halogenid gebildet wird, wird als besondere Hilfsanode eingeführt. Dabei hat man es in der Hand, den Gehalt an dem Halogenid des Hilfsmetalles durch das Potential bzw. die Stromstärke des Hilfsstromkreises zu regeln. Zur Erzielung vollständig dichter Niederschläge genügt .bereits ein Gehalt von o,i bis o,5 ofodes Zusatzmetalles.These additives to the electrolyte can be in it in several ways be brought in. Either they are added to it immediately, or the metal, from which the halide in question is formed is called a special auxiliary anode introduced. You have it in hand, the content of the halide of the auxiliary metal to be regulated by the potential or the current strength of the auxiliary circuit. To achieve Completely dense precipitation is sufficient. A content of 0.1 to 0.5 ofodes is sufficient Additional metal.

Claims (3)

PATENTANSPRÜCHE: i. Verfahren zur elektrolytischen Gewinnung von reinem Aluminium in dichter Form aus Rohaluminium, Legierungen u. dgl. unter Verwendung des zu raffin@erenden Gutes als feste Anode und einer Kathode ebenfalls in fester Form, beide senkrecht angeordnet, und eines Elektrolytbades, das aus Halogeniden von Aluminium und von Alkali- undloder Erdalkalimetallen besteht, mit einem Schmelzpunkte, niedriger als derjenige der Elektroden, dadurch gekennzeichnet, daß dem Elektrölyten außer den Aluminiumsalzen geringe - Mengen. ,anderer edlerer Metalle oder ihrer Verbindungen zugeführt werden, derenAbscheidungs-bzw.Auflösungspotential in dem betreffenden Elektro lyten sich von demjenigen des Aluminiums um nicht mehr als o,6 Volt unterscheidet. PATENT CLAIMS: i. Process for the electrowinning of pure Dense aluminum from raw aluminum, alloys and the like using of the goods to be refined as a solid anode and a cathode also in solid form Form, both arranged vertically, and an electrolyte bath made of halides of aluminum and of alkali and / or alkaline earth metals, with a melting point, lower than that of the electrodes, characterized in that besides the electrolyte the aluminum salts in small amounts. , other noble metals or their compounds are supplied whose deposition or dissolution potential in the relevant Electrolytes differ from that of aluminum by no more than 0.6 volts. 2. Verfahren nach Anspruch .i, dadurch gekennzeichnet, daß der die dichte Aibscheidung begünstigende Zusatz dem Elektrolyten unmittelbar als Oxyd oder Salz beigegeben wird. 2. The method according to claim .i, characterized in that the dense deposition Favorable additive added directly to the electrolyte as an oxide or salt will. 3. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß der die dichte Abscheidung begünstigende Zusatz dem Elektrolyten durch besondere Hilfsanoden aus- dem ..betreffenden Metall zugeführt wird.3. The method according to claim i, characterized in that the dense deposit Favorable addition to the electrolyte through special auxiliary anodes from the relevant subject Metal is fed.
DEA49322D 1926-11-22 1926-11-23 Process for the electrolytic extraction of pure aluminum in dense form from raw aluminum, alloys and the like. like Expired DE484196C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA49322D DE484196C (en) 1926-11-22 1926-11-23 Process for the electrolytic extraction of pure aluminum in dense form from raw aluminum, alloys and the like. like

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE280881X 1926-11-22
DEA49322D DE484196C (en) 1926-11-22 1926-11-23 Process for the electrolytic extraction of pure aluminum in dense form from raw aluminum, alloys and the like. like

Publications (1)

Publication Number Publication Date
DE484196C true DE484196C (en) 1929-10-10

Family

ID=25773948

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA49322D Expired DE484196C (en) 1926-11-22 1926-11-23 Process for the electrolytic extraction of pure aluminum in dense form from raw aluminum, alloys and the like. like

Country Status (1)

Country Link
DE (1) DE484196C (en)

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