AT69780B - Process for decolorizing and cleaning yellow or brown colored talc (soapstone). - Google Patents
Process for decolorizing and cleaning yellow or brown colored talc (soapstone).Info
- Publication number
- AT69780B AT69780B AT69780DA AT69780B AT 69780 B AT69780 B AT 69780B AT 69780D A AT69780D A AT 69780DA AT 69780 B AT69780 B AT 69780B
- Authority
- AT
- Austria
- Prior art keywords
- soapstone
- decolorizing
- acid
- brown colored
- yellow
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 4
- 238000004140 cleaning Methods 0.000 title claims 2
- 239000000454 talc Substances 0.000 title claims 2
- 229910052623 talc Inorganic materials 0.000 title claims 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 159000000014 iron salts Chemical class 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 1
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical class [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Detergent Compositions (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Description
<Desc/Clms Page number 1>
EMI1.1
Das Verfahren beruht darauf, dass die Eisenoxyde (oder Manganoxyde), welche dem Speckstein eine gelbe bis brenne Farbe verleihen, in verdünnter Salzsäure oder Schwefelsäure löslich sind, während Speckstein von diesen Säuren nicht angegriffen wird. Die technische Verwertung beruht auf dem Umstande, dass bereits sehr stark verdünnte Säure noch die genannten Oxyde
EMI1.2
gereinigt werden kann.
Die zu Bruchstücken oder gröberem Pulver zerkleinerten Mineralien werden mit Salzsäure (oder mit Schwefelsäure) derart zunächst in der Kälte oder eventuell unter Erwärmen digeriert, dass ein und dieselbe Säuremenge nacheinander mehrere Ladungen des Minerals auslaugt. Der Apparat besteht aus einer Reihe von Gefässen (Zylinder oder Bottichen) aus säurefestem Material, welche untereinander kommunizieren, so dass die Säure aus dem obersten Gefäss m das nächste, dann in das zweite, dritte usw. weitergeleitet werden kann.
(Durch Filter, welche zwischen den einzelnen Gefässen angebracht sind. wird verhindert, dass etwa ein Teil des Mineral- pulvers mit der Säure ausläuft. )
Zuerst wird das oberste Gefäss mit ungefähr dem gleichen Volumen verdünnter roher Salzoder Schwefelsäure angefÜllt und mehrere Stunden darin belassen. dann die Säure durch die Filtriervorrichtung in das zweite Gefäss geleitet, während in das erste Wasser gefüht wird. Nach
EMI1.3
ersten Gefäss in das zweite filtriert wird. Hierauf wird die Säure in ein viertes Gefäss filtriert. das Waschwasser aus dem zweiten Gefäss in das dritte geleitet usw.. bis die Säure erschöpft ist.
Sämtliche Ladungen des Minerals werden dann solange mit Wasser gewaschen, bis die gelben Eisensalze entfernt sind.
Es war allerdings bekannt, dass Sand (insbesondere Quarzsand) von Eisenmineralien durch Behandlung mit Säuren gereinigt werden kann, doch gelingt dies nur unter Anwendung konzentrierter Saules und ill der Hitze, dann liegt eben ein bedeutender Unterschied.
Das charakteristische Merkmal des vorliegenden Verfahrens liegt nun darin, dass bereits
EMI1.4
diinnter Säure in der Kälte löslich ist.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
EMI1.1
The method is based on the fact that the iron oxides (or manganese oxides), which give soapstone a yellow to burning color, are soluble in dilute hydrochloric or sulfuric acid, while soapstone is not attacked by these acids. The technical utilization is based on the fact that already very strongly diluted acid still contains the oxides mentioned
EMI1.2
can be cleaned.
The minerals, crushed into fragments or coarser powder, are first digested with hydrochloric acid (or with sulfuric acid) in the cold or possibly with warming in such a way that one and the same amount of acid leaches out several charges of the mineral one after the other. The apparatus consists of a series of vessels (cylinders or vats) made of acid-proof material, which communicate with one another so that the acid can be passed on from the top vessel to the next, then into the second, third, etc.
(Filters, which are placed between the individual vessels, prevent some of the mineral powder from leaking out with the acid.)
First the top vessel is filled with roughly the same volume of dilute, raw hydrochloric or sulfuric acid and left in it for several hours. then the acid is passed through the filter device into the second vessel, while water is fed into the first. After
EMI1.3
first vessel is filtered into the second. The acid is then filtered into a fourth vessel. the washing water from the second vessel is passed into the third, etc. until the acid is exhausted.
All charges of the mineral are then washed with water until the yellow iron salts are removed.
It was known, however, that sand (especially quartz sand) can be cleaned of iron minerals by treatment with acids, but if this can only be achieved by using concentrated columns and heat, then there is a significant difference.
The characteristic feature of the present method is that already
EMI1.4
thin acid is soluble in the cold.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT69780T | 1913-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT69780B true AT69780B (en) | 1915-09-10 |
Family
ID=3591596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT69780D AT69780B (en) | 1913-09-10 | 1913-09-10 | Process for decolorizing and cleaning yellow or brown colored talc (soapstone). |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT69780B (en) |
-
1913
- 1913-09-10 AT AT69780D patent/AT69780B/en active
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