DE723060C - Manufacture of blue pigments - Google Patents

Manufacture of blue pigments

Info

Publication number
DE723060C
DE723060C DEK138952D DEK0138952D DE723060C DE 723060 C DE723060 C DE 723060C DE K138952 D DEK138952 D DE K138952D DE K0138952 D DEK0138952 D DE K0138952D DE 723060 C DE723060 C DE 723060C
Authority
DE
Germany
Prior art keywords
manufacture
blue pigments
barium
added
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
DEK138952D
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.)
Kali Chemie AG
Original Assignee
Kali Chemie AG
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 Kali Chemie AG filed Critical Kali Chemie AG
Priority to DEK138952D priority Critical patent/DE723060C/en
Application granted granted Critical
Publication of DE723060C publication Critical patent/DE723060C/en
Expired legal-status Critical Current

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
    • 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
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Description

Herstellung blauer Pigmente Nach dem Verfahren des Patents 719639 stellt man blaue Pigmente her, indem man durch Glühen einer Mischung von Mangandioxyd und Bariumntrat in Gegenwart oder unter Bildung von Bariumsulfat zunächst eine Fritte herstellt, die durch Behandeln mit Wasser und Säure von löslichen. Bariumverbindungen befreit wird.Production of blue pigments According to the method of patent 719639 blue pigments are produced by glowing a mixture of manganese dioxide and barium infusion in the presence or with the formation of barium sulfate initially a frit manufactures soluble by treating with water and acid. Barium compounds is released.

Es ist dabei angegeben, rlaß es vorteilhafter ist, die Fritten mit Säuren, wie Salzsäure oder Salpetersäure, zu behandeln anstatt mit Schwefelsäure, weil im letzten Fall durch die gleichzeitige Anwesenheit von Ba- und S O¢-ionen Bariumsulfatausgefällt wird, das sich dem Pigment beimengt und dessen Farbkonzentration herabsetzt.It is stated that it is more advantageous to use the fries Treating acids such as hydrochloric acid or nitric acid instead of sulfuric acid, because in the latter case by the simultaneous presence of Ba and S O ¢ ions Barium sulfate is precipitated, which is added to the pigment and its color concentration belittles.

Es hat sich, nun gezeigt, daß man bei der Behandlung mit Säuren, wie Salzsäure oder Salpetersäure, -durch Zusatz von Natriumnitrit, Wasserstoffperoxyd oder Bariumperoxyd eine noch größere Farbtiefe der Pigmente erzielen kann, deren Intensität -eb,Qnfalls nicht durch mitausgefälltes Bariumsulfat vermindert ist. Die auf diese Weise hergestellten Pigmente neigen auch nicht, wie dies beim .Arbeiten nach dem Verfahren des Hauptpatents bisweilen beobachtet wurde, zur Änderung des Farbtons in ein grünliches Blau. Ausführungsbeispiele z. Eine Mischung aus 76,8,g Blanc fixe, 5,9 Mangandioxyd und I3 I g Bariumnitrat wurde in .einem Muffelofen i Stunde auf jetwa 700° erhitzt. Das Glühprodukt wurde in Wasser suspendiert. Der Suspension wurden 5 g Natriumnitrit zugesetzt, darauf 32 g Salzsäure vom spez. Gewicht i, i 9. Nach denn. völligen Zerfallen der Fritte wurde filtriert und ausgewaschen. Das erhaltene Pigment war von rein blauer Farbe.It has now been shown that when treating with acids such as hydrochloric acid or nitric acid, by adding sodium nitrite, hydrogen peroxide or barium peroxide, an even greater depth of color can be achieved in the pigments, the intensity of which is not reduced by co-precipitated barium sulfate . The pigments produced in this way also do not tend, as has sometimes been observed when working according to the process of the main patent, to change the hue to a greenish blue. Embodiments z. A mixture of 76.8 g of Blanc fixe, 5.9 of manganese dioxide and 13 l g of barium nitrate was heated in a muffle furnace to about 700 ° for one hour. The glow product was suspended in water. 5 g of sodium nitrite were added to the suspension, then 32 g of hydrochloric acid of spec. Weight i, i 9. After then. complete disintegration of the frit was filtered and washed. The pigment obtained was pure blue in color.

2. Die gleiche Fritte wie in Beispiel i wurde in Wasser suspendiert und mit Salzsäure versetzt. Vor dem Filtrieren wurden der Suspension des Pigments zog 3o%iges Wasserstoffperoxyd zugesetzt. Alsdann wurde filtriert. Das Waschwasser wurde mit geringen Mengen Wasserstoffperoxyd versetzt. Das erhaltene Pigment war von rein blauer Farbe und farbkräftiger ,als ein nachdem Verfahren des Hauptpatents erhaltenes Pigment.2. The same frit as in Example i was suspended in water and mixed with hydrochloric acid. Before filtering, the suspension of the pigment drew 30% hydrogen peroxide added. It was then filtered. The wash water small amounts of hydrogen peroxide were added. The pigment obtained was of a pure blue color and stronger in color than one after the process of the main patent obtained pigment.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung blauer Pigmentes nach Patent 7 19 639, dadurch gekennzeichnet, daß den mit Salzsäure oder Salpetersäure zu behandelnden Fritten Alkalinitrit, Wasserstoffperoxyd und/oder Bariumperoxyd zugesetzt wird.Claim: A process for the production of blue pigment according to 7 1 9 639, characterized in that the nitric acid is added with hydrochloric acid or frits alkali nitrite, hydrogen peroxide and / or barium peroxide to be treated.
DEK138952D 1935-08-14 1935-08-14 Manufacture of blue pigments Expired DE723060C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK138952D DE723060C (en) 1935-08-14 1935-08-14 Manufacture of blue pigments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK138952D DE723060C (en) 1935-08-14 1935-08-14 Manufacture of blue pigments

Publications (1)

Publication Number Publication Date
DE723060C true DE723060C (en) 1942-07-28

Family

ID=7249267

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK138952D Expired DE723060C (en) 1935-08-14 1935-08-14 Manufacture of blue pigments

Country Status (1)

Country Link
DE (1) DE723060C (en)

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