DE250092C - - Google Patents
Info
- Publication number
- DE250092C DE250092C DENDAT250092D DE250092DA DE250092C DE 250092 C DE250092 C DE 250092C DE NDAT250092 D DENDAT250092 D DE NDAT250092D DE 250092D A DE250092D A DE 250092DA DE 250092 C DE250092 C DE 250092C
- Authority
- DE
- Germany
- Prior art keywords
- melt
- natural
- barium sulfate
- sulfate
- water
- 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.)
- Active
Links
- TZCXTZWJZNENPQ-UHFFFAOYSA-L Barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- -1 sodium sulphate Chemical class 0.000 claims 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 229910052601 baryte Inorganic materials 0.000 description 2
- 239000010428 baryte Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- CJDPJFRMHVXWPT-UHFFFAOYSA-N Barium sulfide Chemical compound [S-2].[Ba+2] CJDPJFRMHVXWPT-UHFFFAOYSA-N 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005445 natural product Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Die Erfindung betrifft ein Verfahren zur Gewinnung eines feinverteilten reinen Bariumsulfats von hoher Deckkraft aus natürlichem Bariumsulfat.The invention relates to a method for obtaining a finely divided pure barium sulfate with high coverage made from natural barium sulfate.
Farbkörper aus natürlichem Bariumsulfat, Schwerspat werden gewöhnlich durch zwei verschiedene Verfahren gewonnen.Color bodies made from natural barium sulfate, barite are usually mixed by two won various procedures.
Das eine dieser Verfahren besteht darin, den natürlichen Stoff auf mechanischem WegeOne of these methods is to mechanically remove the natural substance
ίο so fein als möglich zu pulvern und dann entweder zu sichten oder in Wasser zuίο and then powder as finely as possible either to be sifted or in water too
. schwemmen, um die feinsten Pulverteilchen zu sammeln, worauf sie gereinigt, getrocknet und in diesem Zustande verkauft werden.. float to collect the finest powder particles, after which they are cleaned, dried and be sold in this condition.
Indessen haben die geschwemmten Baryte, obwohl sie einen genügenden Grad von Weiße besitzen, verhältnismäßig keine gute Deckkraft. However, the barytes washed up, although of a sufficient degree of whiteness have relatively poor coverage.
Nach dem zweiten Verfahren wird das natürliche Mineral zunächst durch Erhitzen mit Kohle o. dgl. in Bariumsulfid übergeführt, gereinigt, gelöst und mit einer Natriumsulfatlösung gefällt. Nach dem Reinigen und teilweisen oder völligen Trennen vom Wasser zwecks Verpackung in feuchtem oder trockenem Zustande ergibt sich als Endprodukt Blanc fixe von bekannter Handelsbeschaffenheit. According to the second method, the natural mineral is first used by heating it Charcoal or the like converted into barium sulfide, cleaned, dissolved and treated with a sodium sulfate solution pleases. After cleaning and partial or total separation from the water for packaging in a moist or dry place Condition results from the end product Blanc fixe of known commercial properties.
Dieses Verfahren hat indessen den Nachteil, daß das Blanc fixe, welches nach dem Fällen getrocknet ist, eine harte, krustige Masse bildet, die ein ferneres Vermählen erfordert. Aus diesem Grunde wird es gewöhnlich in feuchtem Zustand als breiige Masse von ungefähr 30 Prozent Wassergehalt verkauft. Diese ist zur unmittelbaren Mischung mit Öl nicht geeignet.However, this method has the disadvantage that the Blanc fixe, which after the Felling has dried, forms a hard, crusty mass which requires further grinding. For this reason, it is usually sold in a moist state as a mushy mass with about 30 percent water content. This is not suitable for direct mixing with oil.
Obwohl Blanc fixe auf dem Markt den besten Barytfarbkörper bildet, besitzt es nichtsdestoweniger Nachteile, sowohl hinsichtlich der Deckfähigkeit als der Herstellungskosten.Although blanc fixe is the best barite pigment on the market, it is none the less Disadvantages, both in terms of hiding power and manufacturing costs.
Das vorliegende Verfahren zur Gewinnung von Bariumsulfat besteht darin, daß ein Alkalisulfat, ζ. Β. Natriumsulfat, mit natürlichem Bariumsulfat geschmolzen wird, bis letzteres in der Schmelze vollkommen gelöst ist, ohne daß eine chemische Umsetzung, wie bei dem bekannten, mit Natriumchlorid als Schmelzmittel arbeitenden Verfahren eintritt. Auch hat das Bariumsulfat beim Kühlen der geschmolzenen Lösung, die zweckmäßig vor dem Auflösen geschieht, keine so starke Neigung zum Wiederauskristallisieren in grober Form. Das Bariumsulfat fällt nach dem Lösen der Schmelze in Wasser, welches vorteilhaft durch allmähliches Eintragen erfolgt, direkt als feines, auch nach dem Trocknen keine harten Krusten bildendes Pulver aus, das zur vollständigen Entfernung des Alkalisulfats noch mit Wasser gekocht wird. Das Alkalisulfat kann natürlich in üblicher Weise aus der Lösung wiedergewonnen werden. Etwa im Bariumsulfat noch vorhandene, färbende Verunreinigungen werden durch Behandeln mit geringen Säuremengen entfernt. Beim Schmelzen nimmt man zweckmäßig einen kleinen Überschuß an Alkalisulfat, da die Schmelze dann gleichmäßiger wird,The present process for the production of barium sulfate is that an alkali sulfate, ζ. Β. Sodium sulfate, is melted with natural barium sulfate until the latter is completely dissolved in the melt is without a chemical reaction, as in the case of the known, with sodium chloride as Flux operating process occurs. Also has the barium sulfate when cooling the molten solution, which is expediently done before dissolving, does not have such a strong tendency to recrystallize in coarse form. The barium sulfate falls after dissolving the melt in water, which is advantageous by gradually adding it directly as a fine powder that does not form hard crusts even after drying, which is boiled with water to completely remove the alkali sulfate. That Alkali sulfate can of course be recovered from the solution in a conventional manner. Approximately Coloring impurities still present in the barium sulfate are removed by treatment with small amounts of acid removed. When melting it is advisable to take a small one Excess of alkali sulphate, as the melt then becomes more uniform,
Claims (1)
Verfahren zur Herstellung eines Farbkörpers aus natürlichem Bariumsulfat, dadurch gekennzeichnet, daß natürliches Bariumsulfat mit Alkalisulfaten, wie Natriumsulfat, geschmolzen, die Schmelze zweckmäßig gekühlt und darauf das Bariumsulfat durch Lösen der Schmelze in Wasser im Zustande äußerst feiner Zefteilung abgeschieden wird.Patent claim:
Process for the production of a color body from natural barium sulphate, characterized in that natural barium sulphate is melted with alkali sulphates such as sodium sulphate, the melt is advantageously cooled and the barium sulphate is then deposited by dissolving the melt in water in a state of extremely fine powder division.
Publications (1)
Publication Number | Publication Date |
---|---|
DE250092C true DE250092C (en) |
Family
ID=508654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT250092D Active DE250092C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE250092C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1063304B (en) * | 1956-07-02 | 1959-08-13 | Bayer Ag | Process for the production of inorganic pigments |
-
0
- DE DENDAT250092D patent/DE250092C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1063304B (en) * | 1956-07-02 | 1959-08-13 | Bayer Ag | Process for the production of inorganic pigments |
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