DE499211C - Production of alkali fluoride-aluminum fluoride double compounds - Google Patents

Production of alkali fluoride-aluminum fluoride double compounds

Info

Publication number
DE499211C
DE499211C DER67803D DER0067803D DE499211C DE 499211 C DE499211 C DE 499211C DE R67803 D DER67803 D DE R67803D DE R0067803 D DER0067803 D DE R0067803D DE 499211 C DE499211 C DE 499211C
Authority
DE
Germany
Prior art keywords
alkali
fluoride
production
double compounds
aluminum
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
DER67803D
Other languages
German (de)
Inventor
Dr Peter Schloesser
Dr Emil Teisler
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.)
Ruetgers Germany GmbH
Original Assignee
Ruetgerswerke 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 Ruetgerswerke AG filed Critical Ruetgerswerke AG
Priority to DER67803D priority Critical patent/DE499211C/en
Application granted granted Critical
Publication of DE499211C publication Critical patent/DE499211C/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
    • C01F7/48—Halides, with or without other cations besides aluminium
    • C01F7/50—Fluorides
    • C01F7/54—Double compounds containing both aluminium and alkali metals or alkaline-earth metals

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)

Description

Herstellung von Alkalifluorid-Aluminiumfluorid-Doppelverbindungen Es ist bekannt, Fluoralkali-Fluoraluminium-Doppelverbindungien, z. B. Kryolith, aus Fluoraluminiumlösungen in der Weise herzustellen, daß man die Lösung von Fluoraluminium mit der zur Bildung der Doppelverbindung nötigen Menge Fluoralkali versetzt. An Stelle von Fluoralkali 'kann man auch ein Gemisch von Fluorwasserstoff und Alkalihydroxyd bzw. Alkalicarbonat benutzen, aus denen sich in der wässerigen Lösung Fluoralkäli bildet. Versetzt man, wie ebenfalls bekannt. eine im wesentlichen neutrale Fluoraluminiumlösung nur mit Alkalihydroxyd oder Alkalicarbonat, so bildet sich bei Verwendung dein Fällungsmittels in entsprechender Menge neben der Doppelverbindung Tonerde, z. B. nach folgender Gleichung 2 A12F,; -f-- 6 NaOH A12F,; 6 NaF + A1203 + 3 H20. Der in diesem Falle entstehende Niederschlag besteht aus einem Gemisch von etwa 8oOö Kryolith und 2o0 o Tonerde und ist bei Verwendung von nicht ganz kieselsäurefreien Rohstoffen durch ausgefällte Kieselsäure verunreinigt.Production of alkali fluoride-aluminum fluoride double compounds It is known to use fluoroalkali fluoroaluminum double compounds, e.g. B. cryolite, to prepare from fluoroaluminium solutions in such a way that the solution of fluoroaluminum mixed with the amount of fluoroalkali necessary for the formation of the double compound. At Instead of fluoroalkali, a mixture of hydrogen fluoride and alkali hydroxide can also be used or use alkali carbonate, from which fluoroalkäli are formed in the aqueous solution forms. Relocated, as is also known. a substantially neutral fluoroaluminum solution only with alkali hydroxide or alkali carbonate, then your precipitant is formed when you use it in an appropriate amount in addition to the double compound alumina, z. B. after the following Equation 2 A12F ,; -f- 6 NaOH A12F ,; 6 NaF + A1203 + 3 H20. The one in this case The resulting precipitate consists of a mixture of about 8oOö cryolite and 2o0 o Alumina and is by using raw materials that are not completely free from silica precipitated silica contaminated.

Es hat sich gezeigt, daß man aus im wesentlichen neutralen Fluoralumi:niumlösungen mit Alkalihydroxyd bzw. All:alicarbonat allein kieselsäurefreie bzw. kieselsäurearme Mischungen der Doppelverbindungen mit Tonerde ausfällen kann, wienn man bei der Fällung einen kleinen überschuß an Allzalicarbonat bzw. Alkalihydroxyd verwendet, wodurch die Kieselsäure gelöst wird, so daß man sehr reine Niederschläge erhält. Man kann auch so vorgehen, daß man dien kieselsäurehaltigen Niederschlag mit geringen Mengen Alkalilauge oder Alkalicarbonatlösung behandelt.It has been shown that essentially neutral fluoroaluminium solutions with alkali hydroxide or all: alicarbonate alone silicic acid-free or low-silicic acid Mixtures of the double compounds with alumina can precipitate, one wienn at the Precipitation a small excess of alkali metal carbonate or alkali hydroxide is used, whereby the silica is dissolved, so that very pure precipitates are obtained. One can also proceed in such a way that one dien the silicic acid-containing precipitate with little Treated quantities of alkali lye or alkali carbonate solution.

Man erhält in der beschriebenen Weise aus einer Fluoraluinniumlösung einen Nederschlag# von großer Reinheit, so daß das erhaltene Gemisch von Kryolith und Tonerde für die Verwendung in der Ahiminiumindustrie vorzüglich geeignet ist.It is obtained in the manner described from a fluoroaluminium solution a Nederschlag # of great purity, so that the resulting mixture of cryolite and clay is eminently suitable for use in the aluminum industry.

Claims (2)

l'A'rli\'rANS t'RÜCFIE: i. Verfahren zur Herstellung von Alkalifluorid-Aluminiumfluorid-D oppelverbindungen durch Fällen einer wässerigen Fluoraluminiumlösung mit der zur Bildung der gewünschten Doppelsalze erforderlichen Menge Alkalihydroxyd oder Allkalicarbonat, dadurch gekennzeichnet, daß man die Fällung mit .einem geringen übterschuß von Alkalilauge bzw. Alkalicarbonat vornimmt. l'A'rli \ 'rANS t'RÜCFIE: i. Process for the production of alkali fluoride-aluminum fluoride-D oppelverbindungen by precipitating an aqueous fluoroaluminum solution with the for Formation of the desired double salts, required amount of alkali hydroxide or alkali carbonate, characterized in that the precipitation is carried out with a slight excess of alkali or alkali carbonate. 2. Verfahren nach Anspruch I, dadurch gekennzeichnet, daß man das Fällungsmittel in der berechneten Menge verwendet und den erhaltenen Niederschlag mit geringen Mengen Alkahhydroxyd bzw. Alk:alicarbonat behandelt.2. The method according to claim I, characterized in that that one uses the precipitant in the calculated amount and the amount obtained Precipitation treated with small amounts of alkali hydroxide or alkali carbonate.
DER67803D 1926-06-08 1926-06-08 Production of alkali fluoride-aluminum fluoride double compounds Expired DE499211C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER67803D DE499211C (en) 1926-06-08 1926-06-08 Production of alkali fluoride-aluminum fluoride double compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER67803D DE499211C (en) 1926-06-08 1926-06-08 Production of alkali fluoride-aluminum fluoride double compounds

Publications (1)

Publication Number Publication Date
DE499211C true DE499211C (en) 1930-06-04

Family

ID=7413229

Family Applications (1)

Application Number Title Priority Date Filing Date
DER67803D Expired DE499211C (en) 1926-06-08 1926-06-08 Production of alkali fluoride-aluminum fluoride double compounds

Country Status (1)

Country Link
DE (1) DE499211C (en)

Similar Documents

Publication Publication Date Title
DE1174749B (en) Process for the production of modified synthetic molecular sieves
DE499211C (en) Production of alkali fluoride-aluminum fluoride double compounds
DE646109C (en) Manufacture of cryolite
DE1120834B (en) Bath for the galvanic deposition of chrome coatings
DE931223C (en) Process for purifying calcium chloride
EP0002016B1 (en) Method of purifying ammonium fluoride solutions
DE602499C (en) Process for the production of composite titanium pigments
DE569943C (en) Manufacture of cryolite
DE549664C (en) Process for the production of red mineral paints
DE545866C (en) Process for the production of an etchant for producing frosted glass
AT130629B (en) Process for the production of pure aluminum-alkali double fluorides.
DE559519C (en) Production of alumina from alkaline earth aluminate
DE569848C (en) Production of pure aluminum alkali double fluorides
DE607395C (en) Process for the production of titanium acid or titanium pigments
DE692122C (en) Rhodium bath
DE484456C (en) Process for the production of concentrated cyanalkali solutions
DE334432C (en) Process for the processing of zinc vitriol and zinc solutions containing sulfate on protective zinc oxide
DE603113C (en) Process for the production of a white pigment color with simultaneous production of sodium hydrosulphite
AT108570B (en) Process for the production of technically iron-free aluminum-alkali double fluorides.
DE677147C (en) Purification of natural barite
DE604575C (en) Process for the production of technical beryllium salts from beryllium-containing minerals using fluorine compounds
DE443007C (en) Process for the production of technically pure fluoroaluminium-fluoroalkali double compounds
DE698318C (en) Process for the preparation of 2-oxynaphthalenesulfonic acids and their substitution products
DE381423C (en) Process for obtaining pure zinc sulfide
DE348274C (en) Process for the production of sodium-aluminum double fluorides that are virtually free of silica