AT137319B - Process for removing iron from acidic aluminum salt solutions. - Google Patents
Process for removing iron from acidic aluminum salt solutions.Info
- Publication number
- AT137319B AT137319B AT137319DA AT137319B AT 137319 B AT137319 B AT 137319B AT 137319D A AT137319D A AT 137319DA AT 137319 B AT137319 B AT 137319B
- Authority
- AT
- Austria
- Prior art keywords
- iron
- salt solutions
- aluminum salt
- removing iron
- acidic aluminum
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 24
- 229910052742 iron Inorganic materials 0.000 title claims description 12
- 239000012266 salt solution Substances 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 6
- 230000002378 acidificating effect Effects 0.000 title claims description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 title claims description 4
- 150000003839 salts Chemical class 0.000 claims description 6
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 150000001844 chromium Chemical class 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-N dithionous acid Chemical compound OS(=O)S(O)=O GRWZHXKQBITJKP-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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)
- Removal Of Specific Substances (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compounds Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Catalysts (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Entfernung von Eisen aus sauren AInmimumsaIztosungen.
In der österr. Patentschrift Nr. 135054 ist beschrieben worden, dass man eisenfreie Chromsalze erhält, wenn die ferrosalzhaltigen Chromsalzlösungen mit Beta-Naphtalinmonosulfo- säure oder ihren Alkalisalzen versetzt werden, wodurch das Eisen in Form des unlöslichen Eisensalzes dieser Säure gefällt wird und hernach von der eisenfreien Chromsalzlösung durch Filtrieren getrennt werden kann.
Wie nun gefunden wurde, lässt sich dieses neue Verfahren auch auf die Abtrennung von Eisen aus den eisenhaltigen Aluminiumsalzlösungen anwenden. Ein einfaches Verfahren zur Lösung dieser wichtigen Aufgabe, da wo es sich um die Reinigung der durch saure Aufschliessung von tonerdehaltigen Ausgangsstoffen gewonnenen Produkte handelt, ist bisher nicht bekannt. Das erfindungsgemässe Verfahren besteht also darin, dass die Aluminiumsalzlösung nach Überführen des Eisens in die Ferroform in der Hitze mit Beta-Naphthalinsulfosäure bzw. deren löslichen Salzen in geringem Überschuss versetzt und der entstehende Niederschlag in der Kälte abfiltriert wird.
Voraussetzung der vollständigen Abtrennung des Eisens ist die Anwesenheit desselben in der Ferrosalzform. Infolgedessen muss der Operation des Ausfällen die vollständige Reduktion vorhandener Ferrisalze vorausgehen, die mit den bekannten Mitteln, wie schweflige Säure, hydroschwef1ige Säure, Eisenpulver, geschehen kann.
Wendet man lösliche Salze der Naphthalinsulfosäure an, so kann das gebildete Ferrosalz dieser Säure durch Umsetzung mit geeigneten Verbindungen, wie z. B. Alkalikarbonaten, in wieder zu gebrauchendes lösliches Salz der Beta-Naphthalinsulfosäure zurüekverwandelt werden.
Beispiel :
100 Teile eines Bauxits, enthaltend 45"/o Al203, 12"/o SiO2, 20% Fe203, werden in bekannter Weise in verbleiten Kesseln mittels der berechneten Menge 60/oiger Schwefelsäure aufgeschlossen, alsdann mit 100-200 Teilen Wasser verdünnt und heiss von der Kieselsäure filtriert ; das Filtrat wird auf zirka 600-700 Volumenteile mit Wasser verdünnt. In dieser Salzlösung werden 104 Teile beta-naphthalinsulfosaures Natrium heiss gelöst und dann langsam 10-12 Teile Hydrosulfit (konzentriert) oder die entsprechende Menge Natriumsulfit oder eines Gemisches beider Salze zugefügt, wodurch sämtliches Eisen beim Abkühlen als fein kristallinisches Ferrosalz ausfällt.
Die vom Niederschlag filtrierte Lösung wird mit eisenfreiem Aluminiumhydroxyd neutralisiert, dann durch Eindampfen oder Kristallisieren daraus Aluminiumsulfat erhalten. So gewonnenes Aluminiumsulfat + 18 H20 enthält 0, 01-0, 020/0 Eisen, ist daher sozusagen eisenfrei.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for removing iron from acidic minimum salt solutions.
In Austrian Patent No. 135054 it has been described that iron-free chromium salts are obtained when the ferrous salt-containing chromium salt solutions are mixed with beta-naphthalene monosulfonic acid or its alkali salts, whereby the iron is precipitated in the form of the insoluble iron salt of this acid and then from the iron-free chromium salt solution can be separated by filtration.
As has now been found, this new process can also be applied to the separation of iron from the iron-containing aluminum salt solutions. A simple method for solving this important task, where it is a question of the purification of the products obtained by acidic digestion of alumina-containing starting materials, is not known so far. The method according to the invention therefore consists in adding a slight excess of beta-naphthalenesulfonic acid or its soluble salts to the aluminum salt solution after the iron has been converted into the ferroform, and the resulting precipitate is filtered off in the cold.
The prerequisite for complete separation of the iron is the presence of the same in the ferrous salt form. As a result, the operation of precipitation must be preceded by the complete reduction of the ferric salts present, which can be done with known agents such as sulphurous acid, hydrosulphurous acid, iron powder.
If soluble salts of naphthalene sulfonic acid are used, the ferrous salt formed of this acid can be converted by reaction with suitable compounds, such as. B. alkali carbonates, can be converted back into soluble salt of beta-naphthalenesulfonic acid which can be used again.
Example:
100 parts of a bauxite containing 45 "/ o Al 2 O 3, 12" / o SiO 2, 20% Fe 2 O 3, are digested in a known manner in leaded kettles using the calculated amount of 60% sulfuric acid, then diluted with 100-200 parts of water and hot from the silica filtered; the filtrate is diluted to about 600-700 parts by volume with water. In this salt solution, 104 parts of sodium beta-naphthalenesulphonate are dissolved and then slowly 10-12 parts of hydrosulphite (concentrated) or the corresponding amount of sodium sulphite or a mixture of both salts are added, whereby all iron precipitates as a finely crystalline ferrous salt on cooling.
The solution filtered from the precipitate is neutralized with iron-free aluminum hydroxide, then aluminum sulfate is obtained therefrom by evaporation or crystallization. Aluminum sulphate + 18 H20 obtained in this way contains 0.01-0.020/0 iron and is therefore iron-free, so to speak.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
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 |
|---|---|
| AT137319B true AT137319B (en) | 1934-04-25 |
Family
ID=33565846
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT137319D AT137319B (en) | 1932-07-09 | 1933-07-01 | 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. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT140567D AT140567B (en) | 1932-07-09 | 1934-05-12 | Process for removing 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 |
|---|---|
| FR757907A (en) | 1934-01-08 |
| FR44872E (en) | 1935-04-24 |
| GB399772A (en) | 1933-10-12 |
| CH169038A (en) | 1934-05-15 |
| AT140567B (en) | 1935-02-11 |
| BE397337A (en) | 1933-08-31 |
| BE403216A (en) | |
| NL35278C (en) | 1935-04-15 |
| DE619018C (en) | 1935-09-20 |
| DE570376C (en) | 1933-02-15 |
| GB422318A (en) | 1935-01-09 |
| NL37350C (en) | 1936-01-15 |
| CH174868A (en) | 1935-01-31 |
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