DE432675C - Process for cleaning and bleaching barite - Google Patents
Process for cleaning and bleaching bariteInfo
- Publication number
- DE432675C DE432675C DEE31782D DEE0031782D DE432675C DE 432675 C DE432675 C DE 432675C DE E31782 D DEE31782 D DE E31782D DE E0031782 D DEE0031782 D DE E0031782D DE 432675 C DE432675 C DE 432675C
- Authority
- DE
- Germany
- Prior art keywords
- barite
- bleaching
- cleaning
- ground
- hydrochloric acid
- 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
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/462—Sulfates of Sr or Ba
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
Description
Verfahren zur Reinigung und Bleichung von Schwerspat. Den Gegenstand der vorliegenden Erfindung bildet ein Verfahren zum Bleichen von Schwerspat. Es ist bereits vorgeschlagen, dem Schwerspat die färbenden, vorzugsweise aus Eisen- bestehenden Verunreinigungen durch Kochen mit Säuren, z. B. Schwefelsäure; zu entziehen. Der Erfolg dieser Methode ist nicht zufriedenstellend, was wahrscheinlich darauf zurückzuführen ist, daß die Eisenoxyde, welche den Spat hauptsächlich verunreinigen, in Säuren sehr schwer löslich sind.Process for cleaning and bleaching barite. The subject of the present invention provides a method for bleaching barite. It it has already been suggested to add the coloring, preferably iron, to the barite existing contamination from cooking with acids, e.g. B. sulfuric acid; to withdraw. The success of this method is unsatisfactory, which is probably due to it is due to the fact that the iron oxides, which mainly contaminate the spatula, are very sparingly soluble in acids.
Es wurde nun gefunden, daß die Behandlung mit Chlor, insbesondere naszierendem Chlor, gute Bleichresultate ergibt, weil hierbei die Eisenoxyde rasch und leicht in Lösung gehen. Anwendbar sind alle Verfahren, die in wäßriger Lösung freies Chlor ergeben. Man arbeitet z. B. mit Braunstein und Salzsäure besonders billig.It has now been found that treatment with chlorine, in particular nascent chlorine, gives good bleaching results because the iron oxides are quickly removed and easily go into solution. All methods that are in aqueous solution can be used result in free chlorine. One works z. B. with manganese dioxide and hydrochloric acid especially cheap.
Man trägt den gemahlenen, gegebenenfalls vorher abgerösteten Spat, welcher mit geringen Prozenten gemahlenem Braunstein gut vermischt ist, in wenig konzentrierter Salzsäure ein und erhitzt das Gemisch auf eine verhältni'sinäßig geringe Temperatur.You wear the ground, possibly previously roasted spatula, which is well mixed with a small percentage of ground brownstone, in a little concentrated hydrochloric acid and heated the mixture to a proportional low temperature.
Das überschüssige Chlor, welches entweicht, wird über Kalk geleitet oder in Natronlauge aufgefangen. Die verwendete Salzsäure zieht man zum Schluß ab und kann sie öfters wieder zu neuen Ansätzen benutzt werden.The excess chlorine that escapes is passed over lime or collected in caustic soda. The hydrochloric acid used is drawn off at the end and it can often be used again for new approaches.
Beispiel. ioo kg gerösteter und gemahlener Sch-,verspat werden mit 2 bis 3 Prozent gemahlenem Braunstein gut gemischt. Die Mischung wird dann in etwa 5o kg rohe konzentrierte Salzsäure eingetragen und darauf mit Dampf so lange erhitzt; bis völlige Entfärbung eingetreten ist.Example. 100 kg of roasted and ground Sch-, spar with Mix 2 to 3 percent of ground brownstone well. The mixture is then roughly 50 kg of crude concentrated hydrochloric acid added and then heated with steam for so long; until complete discoloration has occurred.
Man läßt absitzen, zieht die Säure vom Spat, wäscht diesen bis zur neutralen Reaktion mit Wasser aus und trocknet.It is allowed to settle, the acid is removed from the spatula, it is washed up to neutral reaction with water and dries.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE31782D DE432675C (en) | 1924-12-25 | 1924-12-25 | Process for cleaning and bleaching barite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE31782D DE432675C (en) | 1924-12-25 | 1924-12-25 | Process for cleaning and bleaching barite |
Publications (1)
Publication Number | Publication Date |
---|---|
DE432675C true DE432675C (en) | 1926-08-07 |
Family
ID=7075263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEE31782D Expired DE432675C (en) | 1924-12-25 | 1924-12-25 | Process for cleaning and bleaching barite |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE432675C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2943205A1 (en) * | 1978-10-30 | 1980-05-08 | Supra Ab | PIGMENT TREATMENT METHODS |
-
1924
- 1924-12-25 DE DEE31782D patent/DE432675C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2943205A1 (en) * | 1978-10-30 | 1980-05-08 | Supra Ab | PIGMENT TREATMENT METHODS |
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