DE432675C - Process for cleaning and bleaching barite - Google Patents

Process for cleaning and bleaching barite

Info

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
Application number
DEE31782D
Other languages
German (de)
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.)
HANSA PHOSPHAT U MINERAL MUEHL
Original Assignee
HANSA PHOSPHAT U MINERAL MUEHL
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 HANSA PHOSPHAT U MINERAL MUEHL filed Critical HANSA PHOSPHAT U MINERAL MUEHL
Priority to DEE31782D priority Critical patent/DE432675C/en
Application granted granted Critical
Publication of DE432675C publication Critical patent/DE432675C/en
Expired legal-status Critical Current

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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)

PATENTANSPRÜCHE: i. Verfahren zur Reinigung und Bleichung von Schwerspat, dadurch gekennzeichnet, daß der gemahlene Spat bei Gegenwart von Wasser mit Chlor zweckmäßig im Entstehungszustand behandelt wird. PATENT CLAIMS: i. Process for the purification and bleaching of barite, characterized in that the ground spar is expediently treated with chlorine in the presence of water in the state in which it is formed. 2. Ausführungsform des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß der Spat mit geringen Mengen Braunstein vermischt, in Salzsäure eingetragen, erhitzt und sodann ausgewaschen wird.2nd embodiment of the A method according to claim i, characterized in that the spar with small amounts Brownstone mixed, added to hydrochloric acid, heated and then washed out will.
DEE31782D 1924-12-25 1924-12-25 Process for cleaning and bleaching barite Expired DE432675C (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2943205A1 (en) * 1978-10-30 1980-05-08 Supra Ab PIGMENT TREATMENT METHODS

Cited By (1)

* Cited by examiner, † Cited by third party
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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