DE491350C - Process for the production of pure, white and finely divided barium or calcium sulfate - Google Patents
Process for the production of pure, white and finely divided barium or calcium sulfateInfo
- Publication number
- DE491350C DE491350C DEL67447D DEL0067447D DE491350C DE 491350 C DE491350 C DE 491350C DE L67447 D DEL67447 D DE L67447D DE L0067447 D DEL0067447 D DE L0067447D DE 491350 C DE491350 C DE 491350C
- Authority
- DE
- Germany
- Prior art keywords
- melt
- modification
- barium
- alkaline earth
- pure
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/027—Barium sulfates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/025—Calcium sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Verfahren zur Herstellung von reinem, weißem und fein verteiltem Barium- oder Calciumsulfat Gegenstand der vorliegenden Erfindung ist eine weitere Ausbildung des Verfahrens zur Herstellung von reinem, weißem und fein verteiltem Barium- oder Calciumsulfat nach Patent .485 007.Process for the production of pure, white and finely divided barium or calcium sulfate The present invention is a further embodiment of the process for the production of pure, white and finely divided barium or Calcium sulfate according to patent .485 007.
Es hat sich nämlich ergeben, daß an Stelle von Luft auch andere Sauerstoff enthaltende oder für sich oder in Mischung mit Wasserdampf oxydierend wirkende Gase oder Gasgemische, welche bei der Sauerstoffabgabe in Verbindungen übergehen, welche in der Schmelze auf Bariumsulfat nicht einwirken, zur Oxydation der Alkalichlorid-Bariumsulfat- bzw. Calciumsulfatschmelze verwendet werden können.It has been found that instead of air, other oxygen containing gases or gases that have an oxidizing effect on their own or in a mixture with water vapor or gas mixtures which convert into compounds when oxygen is released, which Do not act on barium sulphate in the melt, to oxidize the alkali metal chloride barium sulphate or calcium sulphate melt can be used.
Weiterhin hat sich gezeigt, daB an Stelle basischer Zuschläge bei gewöhnlicher Temperatur neutrale Verbindungen zur Anwendung kommen können, die, beispielsweise wie Barium- oder Calciumcarbonat oder die Nitrate der Erdalkalien, bei höherer Temperatur unter Zersetzung in basische Verbindungen, wie Erdalkalioxyde, übergehen, die in der Schmelze auf Bariumsulfat nicht einwirken.It has also been shown that instead of basic additives, normal temperature neutral compounds can be used, which, for example like barium or calcium carbonate or the nitrates of alkaline earths, at higher temperatures with decomposition into basic compounds such as alkaline earth oxides, which do not act on barium sulfate in the melt.
Die Vorreinigung der Alkalichlorid-, Barium- bzw. Calciumsulfatschmelze durch Klärerlassen und die Weiterbehandlung der Schmelze durch Einwirkung von oxydierenden Agenzien mit oder ohne Zugabe von bass scher oder sauren Zuschlägen braucht nicht immer getrennt vor sich zu gehen. Besonders bei reineren Ausgangsmaterialien können beide Arbeiten gemeinsam in einem Herdraum ausgeführt werden.The pre-cleaning of the alkali chloride, barium or calcium sulphate melt by allowing clarification and further treatment of the melt through the action of oxidizing agents Agents with or without the addition of bass or acidic additives are not needed to always go on separately. Especially with purer raw materials you can both work can be carried out together in one hearth.
Das Verfahren kann auch so durchgeführt werden, daB beide Rohstoffe gemeinsam oder wenigstens das schmelzbare Salz auf einem Tafelgewölbe eingeschmolzen «-erden. Die urschmelzbaren Verunreinigungen bleiben dann auf dem Tafelgewölbe liegen und können in gewissen Zeitabschnitten entfernt werden, während die so vorgereinigte Schmelze in den eigentlichen wannenförmigen Herdraum abläuft, in dein sie dann in einem Arbeitsgang durch oxydierende Agenzien unter Zugabe von sauren oder basischen Zuschlägen und Klärerlassen .weitergereinigt wird. Enthält der zur Verwendung kommende Schwerspat nicht allzuviel Gangart, so genügt es, Steinsalz allein auf dem Tafelgewölbe einzuschmelzen und den vorteilhaft vorgewärmtenSchwerspat in das in dein Herdraum sich ansammelnde geschmolzene Salz einzutragen.The process can also be carried out in such a way that both raw materials together or at least melted the fusible salt on a vaulted table "-earth. The fusible impurities then remain on the vaulted table and can be removed in certain periods of time while the pre-cleaned one Melt runs off into the actual tub-shaped hearth space, into your then in an operation using oxidizing agents with the addition of acidic or basic agents Surcharges and clarifications. Is further purified. Contains the one to be used Barite not too much gait, so it is enough, rock salt alone on the vaulted table to melt and the advantageously preheated barite in the in your oven to enter the accumulated molten salt.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL67447D DE491350C (en) | 1926-12-11 | 1926-12-11 | Process for the production of pure, white and finely divided barium or calcium sulfate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL67447D DE491350C (en) | 1926-12-11 | 1926-12-11 | Process for the production of pure, white and finely divided barium or calcium sulfate |
Publications (1)
Publication Number | Publication Date |
---|---|
DE491350C true DE491350C (en) | 1930-02-08 |
Family
ID=7281850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL67447D Expired DE491350C (en) | 1926-12-11 | 1926-12-11 | Process for the production of pure, white and finely divided barium or calcium sulfate |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE491350C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2440386A1 (en) * | 1978-10-30 | 1980-05-30 | Supra Ab | PROCESS FOR THE PURIFICATION AND BLEACHING OF PIGMENTS |
-
1926
- 1926-12-11 DE DEL67447D patent/DE491350C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2440386A1 (en) * | 1978-10-30 | 1980-05-30 | Supra Ab | PROCESS FOR THE PURIFICATION AND BLEACHING OF PIGMENTS |
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