DE1005940B - Process for the production of an extremely finely divided, precipitated mixture of calcium compounds consisting essentially of calcium carbonate - Google Patents
Process for the production of an extremely finely divided, precipitated mixture of calcium compounds consisting essentially of calcium carbonateInfo
- Publication number
- DE1005940B DE1005940B DEC10984A DEC0010984A DE1005940B DE 1005940 B DE1005940 B DE 1005940B DE C10984 A DEC10984 A DE C10984A DE C0010984 A DEC0010984 A DE C0010984A DE 1005940 B DE1005940 B DE 1005940B
- Authority
- DE
- Germany
- Prior art keywords
- calcium
- production
- calcium carbonate
- consisting essentially
- finely divided
- 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.)
- Pending
Links
Classifications
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- 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
- C09C1/021—Calcium carbonates
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- 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
- C01F11/18—Carbonates
- C01F11/182—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds
- C01F11/183—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds the additive being an organic compound
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/10—Solid density
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Dental Preparations (AREA)
Description
Verfahren zur Herstellung eines extrem feinteiligen, gefällten, im wesentlichen aus Calciumcarbonat bestehenden Gemisches von Calciumverbindungen Gegenstand der Hauptpatentanmeldung C 9649 IVa/12m ist ein Verfahren zur Herstellung eines extrem feinteiligen, gefällten, im wesentlichen aus Calciumcarbonat bestehenden Gemisches von Calciumverbindungen durch Umsetzung von Lösungen eines Calciumsalzes mit Carbonaten der Alkalien bzw. des Ammoniums im p,1-Bereich von 8 bis 12 durch Vermischen, welches dadurch gekennzeichnet ist, daß man die Stabilisierung der entstandenen Gallerte durch Zusatz von Salzen komplexbildender, mehrbasischer organischer Oxysäuren, beispielsweise Citraten oder Tartraten, oder Salzen komplexbildender polymerer Phosphorsäuren, beispielsweise Tripolyphosphaten oder Hexametaphosphaten oder deren Gemischen, vornimmt.Process for the production of an extremely fine, precipitated, im a substantial mixture of calcium compounds consisting of calcium carbonate of the main patent application C 9649 IVa / 12m is a process for the production of a extremely finely divided, precipitated, consisting essentially of calcium carbonate Mixture of calcium compounds by reacting solutions of a calcium salt with carbonates of alkalis or ammonium in the p.1 range from 8 to 12 Mixing, which is characterized in that one stabilizes the resulting Jelly by adding salts of complexing, polybasic organic oxyacids, for example citrates or tartrates, or salts of complexing polymeric phosphoric acids, for example tripolyphosphates or hexametaphosphates or mixtures thereof.
Durch gleichzeitigen Zusatz eines löslichen Fluorides oder Silicofluorides kann die Menge- des zuzusetzenden Komplexbildners bis auf die Hälfte der erforderlichen Menge herabgesetzt werden.By adding a soluble fluoride or silicon fluoride at the same time The amount of complexing agent to be added can be up to half that required Amount to be reduced.
Weiter hat es sich als vorteilhaft erwiesen, dem Reaktionsgemisch bestimmte organische, polare Substanzen, wie z. B. die Amine, Amide oder Sulfamide langkettiger, gesättigter oder ungesättigter Fettsäuren oder ein- bzw. mehrwertige, langkettige Alkohole oder langkettige Aldehyde oder Ketone, zuzusetzen.It has also proven advantageous to add the reaction mixture certain organic, polar substances, such as. B. the amines, amides or sulfamides long-chain, saturated or unsaturated fatty acids or mono- or polyvalent, long-chain alcohols or long-chain aldehydes or ketones.
Es wurde nun gefunden, daß vorteilhaft dem Reaktionsgemisch noch zusätzlich langkettige, gesättigte bzw. ungesättigte Fettsäuren und/oder deren Salze zugesetzt werden.It has now been found that the reaction mixture is also advantageous long-chain, saturated or unsaturated fatty acids and / or their salts are added will.
Aus der deutschen Patentschrift 573 435 ist der Zusatz einer geringfügigen Menge eines oberflächenaktiven Stoffes, z. B. Galle oder Fettsäure, zu Düngemitteln bekannt. Demgegenüber werden bei dem Verfahren nicht Fettsäuren allein., sondern ausschließlich diese in Verbindung mit den in der Hauptpatentanmeldung C 9649IVa/12m genannten Salzen, von Oxysäuren, Polyphosphaten bzw. Hexametaphosphaten und Fluoriden bzw. Silicofluariden in wesentlich größerer Menge zugesetzt.From the German patent specification 573 435 the addition of a minor one Amount of surfactant, e.g. B. bile or fatty acid, to fertilizers known. In contrast, the process does not use fatty acids alone., But exclusively this in connection with the in the main patent application C 9649IVa / 12m named salts, of oxy acids, polyphosphates or hexametaphosphates and fluorides or Silicofluariden added in much larger amounts.
In dem Patent 958 830 wird vorgeschlagen, natürliches Calciumcarrbonat in Gegenwart synthetischer oder natürlicher Fettsäuren in Mengen vom, 0,1 bis 40 % bei mindestens 80° zu mahlen, und zwar zu dem Zweck, die Ca1ciumcarbonatteilchen mit einem Überzug zwecks Vermeidung des Zusammenbackens zu versehen. Demgegenüber werden beim vorliegenden Verfahren die Fettsäuren dem Reaktionsgemisch zusätzlich zu den in der Hauptpatentanmeldung C 9649 IVa/ 12m genannten Salzen von Oxysäwren, Polyphosphaten bzw. Hexametaphosphaten und Fluo.riden bzw. Silicofluoriden zugesetzt, wobei offenbar eine chemische Umsetzung stattfindet. Beispiel Einer Lösung, die im Liter 175 g wasserfreie Soda, 17 g Natriumtripolyphosphat, 5 g Natriumsilicofluorid, 2 g Natriumstearat und 170 ml konzentrierte Ammoniaklauge enthält, wird eine in bezug auf die Sodamenge etwa äquivalente Calciumchloridlösung bei gewöhnlicher Temperatur und gutem Durchmischen zugegeben. Um eine völlige Durchmischung zu erzielen, wird die Rührung noch einige Minuten nach der Umsetzung fortgesetzt. Das erhaltene Reaktionsprodukt kann sofort filtriert, mit Wasser gewaschen, getrocknet und zerkleinert werden. Das so gewonnene Calciumcarbonat hat ein Schüttgewicht von etwa 60 g/1 und Teilchengröße von 20 bis 50 m#t.The patent 958 830 suggests natural calcium carbonate in the presence of synthetic or natural fatty acids in amounts from 0.1 to 40 % to grind at least 80 ° for the purpose of grinding the calcium carbonate particles to be provided with a coating to avoid caking. In contrast in the present process, the fatty acids are added to the reaction mixture to the salts of oxysäwren mentioned in the main patent application C 9649 IVa / 12m, Polyphosphates or hexametaphosphates and fluorides or silicofluorides added, a chemical reaction apparently taking place. Example of a solution that 175 g anhydrous soda, 17 g sodium tripolyphosphate, 5 g sodium silicofluoride per liter, Contains 2 g of sodium stearate and 170 ml of concentrated ammonia solution, an in Approximately equivalent calcium chloride solution based on the amount of soda at ordinary temperature and mixed well. In order to achieve complete mixing, the stirring continued for a few minutes after the reaction. The obtained reaction product can be filtered immediately, washed with water, dried and crushed. The calcium carbonate obtained in this way has a bulk density of about 60 g / l and particle size from 20 to 50 m # t.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC10984A DE1005940B (en) | 1955-03-26 | 1955-03-26 | Process for the production of an extremely finely divided, precipitated mixture of calcium compounds consisting essentially of calcium carbonate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC10984A DE1005940B (en) | 1955-03-26 | 1955-03-26 | Process for the production of an extremely finely divided, precipitated mixture of calcium compounds consisting essentially of calcium carbonate |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1005940B true DE1005940B (en) | 1957-04-11 |
Family
ID=7014879
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC10984A Pending DE1005940B (en) | 1955-03-26 | 1955-03-26 | Process for the production of an extremely finely divided, precipitated mixture of calcium compounds consisting essentially of calcium carbonate |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1005940B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010022936A2 (en) * | 2008-08-29 | 2010-03-04 | Baerlocher Gmbh | Process for preparing a mixture comprising at least one inorganic solid and at least one fatty acid salt, mixtures prepared correspondingly and use thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE573435C (en) * | 1931-03-20 | 1933-04-01 | J Traube Dr | Procedure to increase the yield from soil |
DE958830C (en) * | 1951-12-21 | 1957-02-28 | Blanc Omya Sa Du | Process for the treatment of natural calcium carbonates |
-
1955
- 1955-03-26 DE DEC10984A patent/DE1005940B/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE573435C (en) * | 1931-03-20 | 1933-04-01 | J Traube Dr | Procedure to increase the yield from soil |
DE958830C (en) * | 1951-12-21 | 1957-02-28 | Blanc Omya Sa Du | Process for the treatment of natural calcium carbonates |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010022936A2 (en) * | 2008-08-29 | 2010-03-04 | Baerlocher Gmbh | Process for preparing a mixture comprising at least one inorganic solid and at least one fatty acid salt, mixtures prepared correspondingly and use thereof |
WO2010022936A3 (en) * | 2008-08-29 | 2010-05-06 | Baerlocher Gmbh | Process for preparing a mixture comprising at least one inorganic solid and at least one fatty acid salt, mixtures prepared correspondingly and use thereof |
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