DE619018C - Removal of iron from acidic aluminum salt solutions - Google Patents
Removal of iron from acidic aluminum salt solutionsInfo
- Publication number
- DE619018C DE619018C DEG85573D DEG0085573D DE619018C DE 619018 C DE619018 C DE 619018C DE G85573 D DEG85573 D DE G85573D DE G0085573 D DEG0085573 D DE G0085573D DE 619018 C DE619018 C DE 619018C
- Authority
- DE
- Germany
- Prior art keywords
- iron
- salts
- removal
- salt solutions
- aluminum salt
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
-
- 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
- C01F7/746—After-treatment, e.g. dehydration or stabilisation
- C01F7/748—Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compounds Of Iron (AREA)
- Removal Of Specific Substances (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Catalysts (AREA)
Description
Entfernen von Eisen aus sauren Aluminiumsalzlösungen Nach dem Verfahren des Patents 570 376 entfernt man Eisen aus sauren Alunumnamsalzläsungen dadurch, daß man das Eisen mittels ß-Naphthalinsulfosäure oder ihrer löslichen Salze in das unlösliche Ferrosalz dieser Säure überführt und den Niederschlag von der nunmehr eisenfreien Aluminiumsalzlösung abtrennt. Das Ferrosalz der ß-Naphthalinsulfosäure kann durch Umsetveen mit Alkalicarbonaten in ihr lösliches Alkali verwandelt und dieses wieder in den Prozeß eingeführt werden. . Die Anwendung' von Alkalisalzen der ß-Naphthalinsulfosäure ist indessen nicht angängig, wenn die Gewinnung von reinem, von Alkalisulfat und Doppelverbindungen freiem Aluminiumsu lfat beabsichtigt ist.Removing iron from acidic aluminum salt solutions according to the procedure of the patent 570 376, iron is removed from acidic alunumnam salt solutions by that the iron by means of ß-naphthalenesulfonic acid or its soluble salts in the insoluble ferrous salt of this acid transferred and the precipitate of the now separates iron-free aluminum salt solution. The ferrous salt of ß-naphthalene sulfonic acid can be converted into soluble alkali by reacting with alkali carbonates and this can be reintroduced into the process. . The application of alkali salts the ß-naphthalenesulfonic acid is not acceptable if the production of pure, Aluminum sulphate free of alkali sulphate and double compounds is intended.
Es wurde nun gefunden, daß man auch fremdsalzfreie Aluminiumsulfatlösung erhalten kann, wenn man die Ferrosulfat enthaltende Lösung mit solchen Salzen. der ß-Naphthalinsulfosäure behandelt, deren Metalle Sulfate bilden, die bei gewöhnlicher Temperatur schwer oder unlöslich sind. Die bei der Fällung entstandenen. Sulfate befinden sich dann zusammen mit dem unlöslichen Ferrosalz der ß-Naphthalinsulfosäure im Niederschlag, nach dessen Abtrennung das Filtrat lediglich Aluminiumsulfat enthält. . Als derart zu verwendende Salze kommt neben Bariumsalz insbesondere das Calciumsalz der ß-Naphthalinsulfosäure in Frage, dessen Löslichkeit in der Hitze einen glatt verlaufenden Umsatz mit dem Ferrosulfat der Ausgangslösung gestattet. Diese Salze haben auch den Vorzug, daß sie sich leicht durch Umsetzen der regenerierten Alkalisalze der ß-Naphthalinsulfosäure mit Erdalkalichlorid zurückgewinnen lassen.It has now been found that aluminum sulfate solution free from extraneous salts can also be used can be obtained if the ferrous sulfate-containing solution with such salts. the Treated ß-naphthalenesulfonic acid, the metals of which form sulfates, which with ordinary Temperature are difficult or insoluble. Those resulting from the felling. Sulfates are then found together with the insoluble ferrous salt of ß-naphthalenesulfonic acid in the precipitate, after which the filtrate only contains aluminum sulfate. . As salts to be used in this way, in addition to the barium salt, there is in particular the calcium salt the ß-naphthalenesulfonic acid in question, its solubility in the heat one smooth permitting ongoing conversion with the ferrous sulfate of the starting solution. These salts also have the merit that they can be easily converted by reacting the regenerated alkali salts recover the ß-naphthalenesulfonic acid with alkaline earth chloride.
Während demnach im Verfahren des Hauptpatents nur Salze der ß-Naphthälinsulfosäure Verwendung finden, die bei gewöhnlicher Temperatur löslich sind und bei deren Umsetzung mit den gelösten Eisensalzen außer dem Ferrosalz der ß-Naphthalinsulfosäure lösliche Salze entstehen, die in die Aluminiumsalzlösung übergehen und sie verunreinigen, wird im vorliegenden Verfahren aus Fexrosulfat enthaltender Aluminiumsulfatlösung reine Aluminiumsulfatlösung erhalten sowie ein Niederschlag, aus dem die Ausgangssalze der ß-Naphthalinsulfosäure sich leicht zurückgewinnen lassen.Accordingly, only salts of ß-naphthälinsulfonic acid in the process of the main patent Find use that are soluble at ordinary temperature and in their implementation soluble with the dissolved iron salts except for the ferrous salt of ß-naphthalenesulfonic acid Salts are formed, which pass into the aluminum salt solution and contaminate it, in the present process is made from aluminum sulfate solution containing fexro sulfate pure aluminum sulfate solution and a precipitate from which the starting salts are obtained the ß-naphthalenesulfonic acid can easily be recovered.
Neu und von vorteilhafter Wirkung ist weiter der Umstand, daß beim Fällen ein Überschuß an Fällungsmittel, der einer vollkommenen Eisenabtrennung zweckdienlich ist, bei derebenfalls nicht in die Endlösung übergeht, wie es beim Gebrauch löslicher Salze-vörkon mt, sondern im Filtrationsrückstand verbleibt und aus cties,esn zurückgewonnen werden kann.Another new and advantageous effect is the fact that the Cases an excess of precipitating agent, which is useful for a complete removal of iron is also not included in the Final solution passes over, as it does with Use of soluble salts-vorkon mt, but remains in the filtration residue and from cties, esn can be recovered.
Beispiel In ioo Teile der vom Bauxitaufschluß herrührenden schwefelsauren Lösung, enthaltend 25 Teile Aluminiumsulfat und q. Teile Ferrisulfat, werden 9,5 Teile ß-naphthajinsulfos,aurer Kalk eingetragen. Bei etwa 8o° wird unter Rühren Schwefeldioxyd eingeleitet, bis das Eisen vollständig als (3-naphthalinsulfösaures Eisenoxydul ausgefällt ist. Nach Abkühlen auf etwa. io° wird die Lösung von dem aus p-naphthalinsulfosaurem Eisenoxydul und Calciumsulfat bestehenden Niederschlag abfiltriert. Aus dem Filtrat wird durch Kristallisation Aluminiumsulfat erhalten, welches nur etwa o,oi % Eisen als Verunreinigung enthält.EXAMPLE In 100 parts of the sulfuric acid solution originating from the bauxite digestion, containing 25 parts of aluminum sulfate and q. Parts of ferric sulphate, 9.5 parts of ß-naphthajinsulphos, acidic lime are added. At about 80 °, sulfur dioxide is passed in with stirring until the iron has completely precipitated as (3-naphthalenesulfonic acid iron oxide. After cooling to about 80 °, the solution is filtered off from the precipitate consisting of p-naphthalenesulfonic acid iron oxide and calcium sulfate. From the filtrate obtained by crystallization aluminum sulfate, which contains only about oi% iron as an impurity.
Claims (1)
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE403216D BE403216A (en) | 1932-07-09 | ||
DEG83083D DE570376C (en) | 1932-07-09 | 1932-07-09 | Removal of iron from acidic aluminum salt solutions |
DEG85573D DE619018C (en) | 1932-07-09 | 1933-05-20 | Removal of iron from acidic aluminum salt solutions |
AT137319D AT137319B (en) | 1932-07-09 | 1933-07-01 | Process for removing iron from acidic aluminum salt solutions. |
BE397337D BE397337A (en) | 1932-07-09 | 1933-07-03 | |
NL65882A NL35278C (en) | 1932-07-09 | 1933-07-04 | |
FR757907D FR757907A (en) | 1932-07-09 | 1933-07-04 | Process for removing iron from acidic aluminum salt solutions |
GB19176/33A GB399772A (en) | 1932-07-09 | 1933-07-06 | Process for removing iron from acid solutions of aluminium salts |
CH169038D CH169038A (en) | 1932-07-09 | 1933-07-07 | Process for removing iron from acidic aluminum salt solutions. |
AT140567D AT140567B (en) | 1932-07-09 | 1934-05-12 | Process for removing iron from acidic aluminum salt solutions. |
CH174868D CH174868A (en) | 1932-07-09 | 1934-05-15 | Method of removing iron from acidic aluminum salt solutions. |
FR44872D FR44872E (en) | 1932-07-09 | 1934-05-17 | Process for removing iron from acidic aluminum salt solutions |
NL69480A NL37350C (en) | 1932-07-09 | 1934-05-18 | |
GB15301/34A GB422318A (en) | 1932-07-09 | 1934-05-22 | Process for removing iron from acid solutions of aluminium sulphate |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG83083D DE570376C (en) | 1932-07-09 | 1932-07-09 | Removal of iron from acidic aluminum salt solutions |
DEG85573D DE619018C (en) | 1932-07-09 | 1933-05-20 | Removal of iron from acidic aluminum salt solutions |
Publications (1)
Publication Number | Publication Date |
---|---|
DE619018C true DE619018C (en) | 1935-09-20 |
Family
ID=33565846
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEG83083D Expired DE570376C (en) | 1932-07-09 | 1932-07-09 | Removal of iron from acidic aluminum salt solutions |
DEG85573D Expired DE619018C (en) | 1932-07-09 | 1933-05-20 | Removal of iron from acidic aluminum salt solutions |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEG83083D Expired DE570376C (en) | 1932-07-09 | 1932-07-09 | Removal of iron from acidic aluminum salt solutions |
Country Status (7)
Country | Link |
---|---|
AT (2) | AT137319B (en) |
BE (2) | BE397337A (en) |
CH (2) | CH169038A (en) |
DE (2) | DE570376C (en) |
FR (2) | FR757907A (en) |
GB (2) | GB399772A (en) |
NL (2) | NL35278C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3148024A (en) * | 1962-10-29 | 1964-09-08 | Universal Oil Prod Co | Process for removing iron from an inorganic aluminum salt solution |
-
0
- BE BE403216D patent/BE403216A/xx unknown
-
1932
- 1932-07-09 DE DEG83083D patent/DE570376C/en not_active Expired
-
1933
- 1933-05-20 DE DEG85573D patent/DE619018C/en not_active Expired
- 1933-07-01 AT AT137319D patent/AT137319B/en active
- 1933-07-03 BE BE397337D patent/BE397337A/xx unknown
- 1933-07-04 FR FR757907D patent/FR757907A/en not_active Expired
- 1933-07-04 NL NL65882A patent/NL35278C/xx active
- 1933-07-06 GB GB19176/33A patent/GB399772A/en not_active Expired
- 1933-07-07 CH CH169038D patent/CH169038A/en unknown
-
1934
- 1934-05-12 AT AT140567D patent/AT140567B/en active
- 1934-05-15 CH CH174868D patent/CH174868A/en unknown
- 1934-05-17 FR FR44872D patent/FR44872E/en not_active Expired
- 1934-05-18 NL NL69480A patent/NL37350C/xx active
- 1934-05-22 GB GB15301/34A patent/GB422318A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE403216A (en) | |
CH174868A (en) | 1935-01-31 |
FR757907A (en) | 1934-01-08 |
NL35278C (en) | 1935-04-15 |
GB399772A (en) | 1933-10-12 |
GB422318A (en) | 1935-01-09 |
CH169038A (en) | 1934-05-15 |
AT137319B (en) | 1934-04-25 |
AT140567B (en) | 1935-02-11 |
DE570376C (en) | 1933-02-15 |
NL37350C (en) | 1936-01-15 |
BE397337A (en) | 1933-08-31 |
FR44872E (en) | 1935-04-24 |
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