DE1154214B - Process for the production of a white pigment - Google Patents

Process for the production of a white pigment

Info

Publication number
DE1154214B
DE1154214B DESCH30813A DESC030813A DE1154214B DE 1154214 B DE1154214 B DE 1154214B DE SCH30813 A DESCH30813 A DE SCH30813A DE SC030813 A DESC030813 A DE SC030813A DE 1154214 B DE1154214 B DE 1154214B
Authority
DE
Germany
Prior art keywords
production
white pigment
satin white
carbonic acid
carbonate
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
Application number
DESCH30813A
Other languages
German (de)
Inventor
Dr Erich Friedrich
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.)
Individual
Original Assignee
Individual
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
Priority to NL293266D priority Critical patent/NL293266A/xx
Application filed by Individual filed Critical Individual
Priority to DESCH30813A priority patent/DE1154214B/en
Publication of DE1154214B publication Critical patent/DE1154214B/en
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • C09C1/40—Compounds of aluminium
    • C09C1/402—Satin white, modifications thereof, e.g. carbonated or silicated; Calcium sulfoaluminates; Mixtures thereof, e.g. with calcium carbonate or kaolin

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

Verfahren zur Herstellung eines weißen Pigments Die Erfindung betrifft die Herstellung eines neuen Weißpigments, das vornehmlich in der Papierfabrikation Verwendung findet. Es wird durch Umsetzung von Aluminiumsulfat mit Kalkhydrat und anschließendes Einleiten von Kohlensäure gewonnen. Das neue Pigment ist demnach ein Satinweißkarbonat und hat die vorteilhaften Eigenschaften von Calciumkarbonatpräzipitat und Satinweiß in sich vereint. Die röntgenmikroskopischen Aufnahmen zeigen, daß das erfindungsgemäß hergestellte Satinweißkarbonat von feinstkristalliner Natur ist.Process for the preparation of a white pigment The invention relates to the production of a new white pigment, which is primarily used in paper manufacture Is used. It is made by reacting aluminum sulfate with hydrated lime and subsequent introduction of carbonic acid obtained. The new pigment is accordingly a satin white carbonate and has the beneficial properties of calcium carbonate precipitate and satin white united in itself. The X-ray micrographs show that the satin white carbonate of the finest crystalline nature produced according to the invention is.

Überdies erwiesen sich die mit dem neuen Pigment behandelten Papiere bei der Prüfung auf Rupfwiderstand solchen mit Satinweiß beschichteten überlegen. Einer der wesentlichsten Vorteile des Satinweißkarbonats gegenüber den bisher bekannten Satinweißpigmenten ist darin zu sehen, daß es auch in getrocknetem Zustand keine Veränderung seiner Vorteile erleidet und so beliebig gelagert und befördert werden kann, z. B. - da es auch vollkommen luftunempfindlich ist - in Papiersäcken.In addition, the papers treated with the new pigment turned out to be When tested for resistance to picking, it is superior to those coated with satin white. One of the main advantages of satin white carbonate over the previously known Satin white pigments can be seen in the fact that there are none even when dried Changes in its advantages and so can be stored and transported at will can e.g. B. - since it is also completely insensitive to air - in paper sacks.

Man hat bereits auch Satinweiß entwässert, um es trocken verwerten zu können. Abgesehen davon, daß dieses Satinweiß in seiner Verwendung nicht die bereits angeführten Vorteile des erfindungsgemäß hergestellten Satinweißkarbonates aufweist, muß es nach dem Zusammenfügen mit anderen Stoffen, unter anderem Leim und Alkali, in einer Kugelmühle einer intensiven Mahlung unterworfen werden.Satin white has already been dehydrated so that it can be used dry to be able to. Apart from the fact that this satin white in its use is not the already mentioned advantages of the satin white carbonate produced according to the invention it has to be assembled with other materials, including glue and alkali, are subjected to intensive grinding in a ball mill.

Es wurde auch bereits ein Weißpigment für Papierstreichfarben so hergestellt, daß man eine Lösung von Magnesiumsulfat mit Kalkmilch fällt, in das Gemisch Kohlensäure einleitet und das gebildete saure Magnesiumkarbonat in neutrales Karbonat umwandelt. Da dieses Produkt jedoch verhältnismäßig grobkristallinisch ist, kommt es schon aus diesem Grund nicht annähernd an das erfindungsgemäße Satinweißkarbonat heran.A white pigment for paper coating colors has also been produced in such a way that that a solution of magnesium sulphate with milk of lime falls into the mixture of carbonic acid initiates and converts the acidic magnesium carbonate formed into neutral carbonate. However, since this product is relatively coarsely crystalline, it comes for this reason does not come close to the inventive satin white carbonate.

Entsprechend der vorliegenden Erfindung wird grießfreie Kalkmilch mit Aluminiumsulfat, entweder in festem Zustand oder in Wasser gelöst, versetzt. Hierbei tritt eine wesentliche Verdickung der Kalkmilch auf, durch Bildung des Satinweißkomplexes der hypothetischen Formel 3 Ca0 - A1.,03 - 3 CaS04 31 H.,0. Durch diese Flüssigkeit wird Kohlensäure, gegebenenfalls mit Luft geleitet, bis das Gemisch schwach alkalisch reagiert. Anschließend wird filtriert, getrocknet und gemahlen.According to the present invention, semolina is made milk of lime with aluminum sulfate, either in the solid state or dissolved in water, added. A significant thickening of the milk of lime occurs as a result of the formation of the satin white complex of the hypothetical formula 3 Ca0 - A1., 03 - 3 CaS04 31 H., 0. Through this liquid carbonic acid is passed, optionally with air, until the mixture is weakly alkaline reacted. It is then filtered, dried and ground.

Beispiel 3 m3 Kalkmilch mit einem Gehalt von 110 g Ca0 pro Liter werden unter Rühren mit 100 kg Aluminiumsulfat, fest oder in Wasser gelöst, versetzt. Anschließend wird in das Reaktionsgemisch ein Kohlensäure-Luft-Gemisch mit etwa 300/a C02 eingeleitet, bis die Flüssigkeit gegen Phenolphthalein nur noch schwach alkalisch reagiert. Danach wird filtriert, getrocknet und gemahlen.Example 3 m 3 of milk of lime with a content of 110 g Ca0 per liter are mixed with 100 kg aluminum sulfate, solid or dissolved in water, with stirring. A carbonic acid-air mixture with about 300 / a CO 2 is then introduced into the reaction mixture until the liquid only reacts slightly alkaline to phenolphthalein. It is then filtered, dried and ground.

Claims (3)

PATENTANSPRÜCHE: 1. Verfahren zur Herstellung eines weißen Pigmentes durch Fällung von Kalkmilch mit Aluminiumsulfat, dadurch gekennzeichnet, daß man nach der Fällung in das Fällungsgemisch Kohlensäure einleitet. PATENT CLAIMS: 1. Process for the production of a white pigment by precipitation of milk of lime with aluminum sulfate, characterized in that one introduces carbonic acid into the precipitation mixture after the precipitation. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man Kohlensäure bis zu einem pH-Wert von 8 bis 9 einleitet. 2. Procedure according to Claim 1, characterized in that carbonic acid up to a pH of 8 to 9 introduces. 3. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß man ein Kohlensäure-Luft-Gemisch einleitet.3. The method according to claim 1 and 2, characterized in that a mixture of carbonic acid and air is introduced.
DESCH30813A 1962-01-10 1962-01-10 Process for the production of a white pigment Pending DE1154214B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL293266D NL293266A (en) 1962-01-10
DESCH30813A DE1154214B (en) 1962-01-10 1962-01-10 Process for the production of a white pigment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH30813A DE1154214B (en) 1962-01-10 1962-01-10 Process for the production of a white pigment

Publications (1)

Publication Number Publication Date
DE1154214B true DE1154214B (en) 1963-09-12

Family

ID=7431876

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH30813A Pending DE1154214B (en) 1962-01-10 1962-01-10 Process for the production of a white pigment

Country Status (2)

Country Link
DE (1) DE1154214B (en)
NL (1) NL293266A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19611454A1 (en) * 1996-03-22 1997-09-25 Rethmann Lippewerk Recycling G Mineral filler and building material additive based on calcium aluminum sulfate and their manufacture and use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19611454A1 (en) * 1996-03-22 1997-09-25 Rethmann Lippewerk Recycling G Mineral filler and building material additive based on calcium aluminum sulfate and their manufacture and use

Also Published As

Publication number Publication date
NL293266A (en)

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