AT35420B - Process for the preparation of a red dye. - Google Patents

Process for the preparation of a red dye.

Info

Publication number
AT35420B
AT35420B AT35420DA AT35420B AT 35420 B AT35420 B AT 35420B AT 35420D A AT35420D A AT 35420DA AT 35420 B AT35420 B AT 35420B
Authority
AT
Austria
Prior art keywords
preparation
red dye
dye
oxy
water
Prior art date
Application number
Other languages
German (de)
Original Assignee
Kalle & Co 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
Priority claimed from DE1905194237D external-priority patent/DE194237C/de
Application filed by Kalle & Co Ag filed Critical Kalle & Co Ag
Application granted granted Critical
Publication of AT35420B publication Critical patent/AT35420B/en

Links

Description

  

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   Aufschäumen   nicht mehr zu beobachten. 



     4.   kg einer Paste von 20% Gehalt an 3-Oxy (1) thionaphten werden in 200 l Wasser linter Zusatz von etwa 12 kg Natronlauge   400 Bé   gelöst. Man versetzt nun mit einer Kalium- 
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   stich dabe   in kristallinischer'Form aus. Die Isolierung erfolgt in der üblichen Weise. 



   5. Zu einer wie bei Beispiel 4 bereiteten Lösung des 3-0xy   (l)   thionaphtens lässt man eine 
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 und   versetzt   mit Mineralsäure. Der Farbstoff scheidet sich dabei vollständig ab, er wird filtriert und ausgewaschen. 



   6. 75 einer Paste von 20% Gehalt an 3-0xy (1) thionaphten werden in 200 l Wasser eingetragen und mit 15 kg Natronlauge   400   Bé versetzt. Man leitet nun solange einen Luftstrom durch, bis noch Abscheidung des roten Farbstoffes erfolgt. Hierauf wird filtriert und gewaschen. 



   Verwendet man an Stelle der 3-Oxy(1)thionaphten-2-karbonsäure bezw. des   3-Oxy (1)-   thionaphtens ihre Sulfosäuren, so erhält man bei der Oxydation einen wasserlöslichen Farbstoff. 



   Man kann diesen aber auch in der Weise herstellen, dass man den getrockneten Farbstoff mit sulfierenden Mitteln behandelt. Die Sulfierungsmethode schliesst sich eng ail die Darstellung   der Indigosulfosäurc an ;   überhaupt erinnert der neue Farbsteff in seinen Eigenschaften an den Indigo, mit dem er auch in seiner Zusammensetzung eine gewisse Ähnlichkeit zeigt. Sie wird vermutlich durch folgende Formel wiedergegeben : 
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PATENT-ANSPRÜCHE : 1. Verfahren zur Darstellung eines roten Farbstoffes, dadurch gekennzeichnet, dass man 
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     4. kg of a paste containing 20% 3-oxy (1) thionaphtene are dissolved in 200 l of water with the addition of about 12 kg of caustic soda 400 Bé. One now adds a potassium
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   stand out in crystalline 'form. Isolation takes place in the usual way.



   5. To a solution of 3-0xy (l) thionaphthene prepared as in Example 4, one is allowed
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 and mixed with mineral acid. The dye separates out completely, it is filtered and washed out.



   6. 75 of a paste with a content of 20% 3-oxy (1) thionaphtene are added to 200 l of water and 15 kg of sodium hydroxide solution 400 Bé are added. A stream of air is now passed through until the red dye is still separated. It is then filtered and washed.



   Is used instead of 3-oxy (1) thionaphten-2-carboxylic acid or. of 3-oxy (1) thionaphthene has its sulfonic acids, a water-soluble dye is obtained on oxidation.



   However, this can also be produced by treating the dried dye with sulphurizing agents. The sulphonation method follows closely with the preparation of indigosulphonic acid; In general, the properties of the new Farbsteff are reminiscent of indigo, with which it also shows a certain similarity in its composition. It is probably represented by the following formula:
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PATENT CLAIMS: 1. Process for the preparation of a red dye, characterized in that one
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AT35420D 1905-05-08 1907-05-23 Process for the preparation of a red dye. AT35420B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1905194237D DE194237C (en) 1905-05-08

Publications (1)

Publication Number Publication Date
AT35420B true AT35420B (en) 1908-12-10

Family

ID=5743316

Family Applications (1)

Application Number Title Priority Date Filing Date
AT35420D AT35420B (en) 1905-05-08 1907-05-23 Process for the preparation of a red dye.

Country Status (1)

Country Link
AT (1) AT35420B (en)

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