DE676802C - Production of poorly soluble zinc yellow - Google Patents

Production of poorly soluble zinc yellow

Info

Publication number
DE676802C
DE676802C DEK143239D DEK0143239D DE676802C DE 676802 C DE676802 C DE 676802C DE K143239 D DEK143239 D DE K143239D DE K0143239 D DEK0143239 D DE K0143239D DE 676802 C DE676802 C DE 676802C
Authority
DE
Germany
Prior art keywords
zinc yellow
production
poorly soluble
soluble zinc
yellow
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
DEK143239D
Other languages
German (de)
Inventor
Dr Georg Heintz
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 DEK143239D priority Critical patent/DE676802C/en
Application granted granted Critical
Publication of DE676802C publication Critical patent/DE676802C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09CTREATMENT 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
    • C09C1/00Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/04Compounds of zinc
    • C09C1/08Zinc chromate

Description

Herstellung von schwer löslichem Zinkgelb Die nach den bekannten Verfahren gewonnenen Zinkgelbe stellen Zinkehromate dar, die als Metallkomponente neben Zink noch Kalium enthalten. (gegenüber den Bleichromaten besitzen die Zink-gelbe die unerwünscht-e Eigenschaft, daß sie ziemlich leicht wasserlöslich sind. - Durch diese leichte Löslichkeit wird u.a. auch die Lichtechtheit ungünstig beeinflußt, so daß die Zinkgelbe, für viele Zwecke nicht ve#rwendet werden können.Production of sparingly soluble zinc yellow The zinc yellows obtained using the known processes are zinc tomatoes that contain potassium as a metal component in addition to zinc. (opposite the lead chromates zinc Yellow have the undesirable-e property that they are quite readily soluble in water -. This slight solubility and lightfastness is adversely affected, among others, so that the zinc yellow, not ve for many purposes # can be rwendet.

Es wurde nun gefunden, daß man die Lüslichkeit des Zinkgelbs in Wasser weitgehend herabsetzen kann, wenn man auf das Zinkgielb Bariumwolframat niederschlägt, indem man zur wässerigen Suspension' eines Zinkgelbs unter Rühren erst eine Bariumsalzlüsiung und daini eine Wolframatlösung oder beide Lösungen gleichzeitig zufließen läßt, wonach der Niederschlag abgetrennt und getrocknet wird. Die vorher stark gelb gefärbte Lösung wird durch diese Nachbehandlung entfärbt. Gibt man dagegen nur eine der beiden Fällungskomponenten oder erst die Wolframatlösung Z, und dann die Bariumsalzlösung hinzu, so bleibt die Lösung gefärbt.It has now been found that the solubility of zinc yellow in water can be largely reduced if barium tungstate is deposited on the zinc yellow by first adding a barium salt solution and then a tungstate solution or both solutions to the aqueous suspension of a zinc yellow while stirring the precipitate is separated off and dried. The previously strongly yellow colored solution is decolorized by this post-treatment. If, on the other hand, only one of the two precipitation components is added or the tungstate solution Z first and then the barium salt solution are added, the solution remains colored.

Ausf ührungsbeispiel Z> 5og eines handelsüblichen Zixikgelbs werden in iooog Wasser suspendiert. Man fügt 12,5 g Bariurachlorid, gelöst in i oo g Wasser, hinzu und läßt innerhalb etwa io Minuten unter -ständigem Rühren 16,5 g Natrium.-wolframat, gelöst in 2oo g Wasser, hinzufließen. Man rührt noch eiwa io Minuten, filtriert ab und trocknet in der üblichen Weise.Embodiment Z> 5og of a commercially available Zixik yellow are suspended in 10000 water. 1.2 g of bariurachloride, dissolved in 100 g of water, are added and 16.5 g of sodium tungstate, dissolved in 200 g of water, are allowed to flow in over about 10 minutes with constant stirring. The mixture is stirred for about 10 minutes, filtered off and dried in the usual way.

Claims (1)

PATE-NTANSPRUCII -. Verfahren zur Herstellung von schwer löslichem Zinkgelb, dadurch gekennzeichnet, daß man zur wässeriggen Suspension eines Zinkgelbs unter Rühren erst eine Barium,salzlösung -und dann eine Wolframatlösung oder beide Lösungen gleichzeitig zufließen läßt, wonach. der Niederschlag abgetrennt und getrocknet wird.PATE-NTANSPRUCII -. Process for the production of poorly soluble Zinc yellow, characterized in that the aqueous suspension of a zinc yellow While stirring, first a barium, salt solution - and then a tungstate solution or both Solutions flow in at the same time, after which. the precipitate separated off and dried will.
DEK143239D 1936-08-07 1936-08-07 Production of poorly soluble zinc yellow Expired DE676802C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK143239D DE676802C (en) 1936-08-07 1936-08-07 Production of poorly soluble zinc yellow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK143239D DE676802C (en) 1936-08-07 1936-08-07 Production of poorly soluble zinc yellow

Publications (1)

Publication Number Publication Date
DE676802C true DE676802C (en) 1939-06-12

Family

ID=7250371

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK143239D Expired DE676802C (en) 1936-08-07 1936-08-07 Production of poorly soluble zinc yellow

Country Status (1)

Country Link
DE (1) DE676802C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1059596B (en) * 1952-04-24 1959-06-18 Lithopone Kontor G M B H Process for the production of pigments

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1059596B (en) * 1952-04-24 1959-06-18 Lithopone Kontor G M B H Process for the production of pigments

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