DE643893C - Process for the preparation of pigments containing lead chromate - Google Patents

Process for the preparation of pigments containing lead chromate

Info

Publication number
DE643893C
DE643893C DEK138715D DEK0138715D DE643893C DE 643893 C DE643893 C DE 643893C DE K138715 D DEK138715 D DE K138715D DE K0138715 D DEK0138715 D DE K0138715D DE 643893 C DE643893 C DE 643893C
Authority
DE
Germany
Prior art keywords
parts
lead
lead chromate
preparation
pigments
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
DEK138715D
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 DEK138715D priority Critical patent/DE643893C/en
Application granted granted Critical
Publication of DE643893C publication Critical patent/DE643893C/en
Expired legal-status Critical Current

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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
    • C09C1/14—Compounds of lead
    • C09C1/20—Lead chromate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Description

Verfahren zur Herstellung von Bleichromat enthaltenden Pigmenten Bleichromat enthaltende Pigmente werden nach den bekannten Verfahren in der Weise hergestellt, daß man die Bleichromatpigmente aus Lösungen, die die zu ihrer Bildung erforderlichen Reaktionskomponenten enthalten, ausfällt, von der Lösung trennt und nach Auswaschen bei niederen Temperaturen trocknet.Process for the preparation of pigments containing lead chromate. Lead chromate pigments containing are prepared according to the known processes in such a way that that the lead chromate pigments from solutions which are necessary for their formation Containing reaction components, precipitates, separates from the solution and after washing out dries at low temperatures.

Es wurde nun gefunden, daß man gelbe bis blaugrüne Bleichromat enthaltende Pigmente erhalten kann, wenn man die zur Bildung der Bleichromat enthaltenden Pigmente erforderlichen Reaktionskomponenten zusammen mit Borsäure auf höhere Temperaturen erhitzt. Man geht zweckmäßig von schwer löslichen Bleiverbindungen, wie Bleisulfat, Bleiweiß, Bleicarbonat, Bleifluorid usw., und Alkali- oder Erdalkalichromaten bzw. Bichromaten aus, mischt die Reaktionskomponenten mit Borsäure und erhitzt auf Temperaturen von etwa 55o bis 65o`-', gegebenenfalls unter Zusatz von Salzen, wie Natriumsulfat, als Flußmittel. Nach dem Erhitzen werden die löslichen Bestandteile aus dem Reaktionsprodukt herausgewaschen, wobei es vorteilhaft ist, dem Waschwasser so viel Säure zuzusetzen, daß es nach dem Herauslösen der löslichen Bestandteile neutral bis schwach sauer reagiert. Nach dem Filtrieren und gegebenenfalls Trocknen erhält man je nach Art und Mengenverhältnissen der Reaktionskomponenten und der Borsäure und der angewandten Temperatur Pigmente von Gelb, Blaugrün bis Grün.It has now been found that yellow to blue-green lead chromate is contained Pigments can be obtained if the pigments used to form the lead chromate are used necessary reaction components together with boric acid to higher temperatures heated. It is advisable to use lead compounds that are difficult to dissolve, such as lead sulfate, White lead, lead carbonate, lead fluoride etc., and alkali or alkaline earth chromates or Bichromates, mixes the reaction components with boric acid and heats to temperatures from about 55o to 65o`- ', if necessary with the addition of salts such as sodium sulfate, as a flux. After heating, the solubles are released from the reaction product washed out, whereby it is advantageous to add enough acid to the washing water, that it is neutral to slightly acidic after the soluble components have been dissolved out reacted. After filtering and, if necessary, drying, depending on the species and proportions of the reaction components and the boric acid and the applied Temperature pigments from yellow, blue-green to green.

Ausführungsbeispiele i. Eine Mischung von 2¢,2q.Teilen Bleisulfat, 6,o Teilen Natriumbichromat und 16,2 Teilen Borsäure wurde i Stunde auf 55o° erhitzt. Nach der Erhitzung wurden die löslichen Bestandteile aus der Schmelze mit heißem Wasser herausgelöst. Dem Waschwasser war so viel Schwefelsäure zugesetzt worden, daß es nach dem Herauslösen der Salze neutral war. Es wurde ein blaugrünes Pigment erhalten.Embodiments i. A mixture of 2 ¢, 2q. Parts of lead sulfate, 6.0 parts of sodium dichromate and 16.2 parts of boric acid were heated to 550 ° for one hour. After heating, the solubles were melted with hot Dissolved water. So much sulfuric acid had been added to the wash water that it was neutral after the salts were dissolved out. It became a blue-green pigment obtain.

2. Eine Mischung von 2o,72 Teilen Bleiweiß, 11,36 Teilen Natriumsulfat, wasserfrei, 6,o Teilen Natriumbichromat und 2o Teilen Borsäure wurde i Stunde auf 6oo" erhitzt. Nach der Erhitzung wurden die löslichen Bestandteile mit angesäuertem Wasser herausgelöst. Es wurde ein dunkles Gelb erhalten.2. A mixture of 20.72 parts of white lead, 11.36 parts of sodium sulfate, anhydrous, 6.0 parts of sodium dichromate and 20 parts of boric acid were added for 1 hour 600 "heated. After the heating, the soluble ingredients were acidified with Dissolved water. A dark yellow was obtained.

3. 2¢,2¢ Teile Bleisulfat, i 5 Teile Bariumchromat (statt Bariumchromat können auch die entsprechenden Mengen Bariumhydroxyd oder Bariumsalz und Alkalichromat bzw. Bichromat genommen werden 'i und 3o Teile Borsäure wurden t Stunde auf 6oo" erhitzt. Nach dem Erhitzen wurden die löslichen Be-:'. standteile herausgelöst. Es wurde ein helilW Blaugrün erhalten. -.1. Eine Mischung von 14,7 Teilen Blei=.. iluorid, 5, r S Teilen Bleiweiß, 6.o Teilen Nätriumbichromat und 2o,o Teilen Borsäure wurden. wie vorstehend beschrieben, behandelt. Es wurde ein dunkles Gelb erhalten.3. 2 ¢, 2 ¢ parts of lead sulfate, i 5 parts of barium chromate (instead of barium chromate, the corresponding amounts of barium hydroxide or barium salt and alkali chromate or bichromate can be used '1 and 30 parts of boric acid were heated to 600 "for 1 hour the soluble constituents dissolved out. A light blue-green was obtained. -.1. A mixture of 1 4.7 parts of lead, 5, 50 parts of white lead, 6.o parts of sodium dichromate and 2o, o Parts of boric acid were treated as described above and a dark yellow was obtained.

Claims (1)

PATFNTANsPtzucfi: Verfahren zur Herstellung von Bleichromat enthaltenden Pigmenten, dadurch gekennzeichnet, dal3 man die zur Bildung der Bleichromat enthaltenden Pigmente >erforderlichen Reaktionskomponenten unter Zusatz von Borsäure auf höhere Temperaturen erhitzt, worauf man die wasserlöslichen Bestandteile aus dem Reaktionsprodukt mit Wasser, gegebenenfalls unter Zusatz von Säure, herauslangt.PATFNTANsPtzucfi: Process for the production of lead chromate containing Pigments, characterized in that those used to form the lead chromate are used Pigments> required reaction components with the addition of boric acid to higher Temperatures heated, whereupon the water-soluble constituents from the reaction product with water, optionally with the addition of acid.
DEK138715D 1935-07-25 1935-07-25 Process for the preparation of pigments containing lead chromate Expired DE643893C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK138715D DE643893C (en) 1935-07-25 1935-07-25 Process for the preparation of pigments containing lead chromate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK138715D DE643893C (en) 1935-07-25 1935-07-25 Process for the preparation of pigments containing lead chromate

Publications (1)

Publication Number Publication Date
DE643893C true DE643893C (en) 1937-05-05

Family

ID=7249208

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK138715D Expired DE643893C (en) 1935-07-25 1935-07-25 Process for the preparation of pigments containing lead chromate

Country Status (1)

Country Link
DE (1) DE643893C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549582A1 (en) * 1974-11-06 1976-05-13 Du Pont CHROME YELLOW PIGMENT WITH IMPROVED THERMAL RESISTANCE
DE2549508A1 (en) * 1974-11-06 1976-05-13 Du Pont MOLYBDATE ORANGE PIGMENTS WITH IMPROVED THERMAL RESISTANCE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549582A1 (en) * 1974-11-06 1976-05-13 Du Pont CHROME YELLOW PIGMENT WITH IMPROVED THERMAL RESISTANCE
DE2549508A1 (en) * 1974-11-06 1976-05-13 Du Pont MOLYBDATE ORANGE PIGMENTS WITH IMPROVED THERMAL RESISTANCE

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