CH166095A - Process for the production of an easily soluble, basic dye. - Google Patents

Process for the production of an easily soluble, basic dye.

Info

Publication number
CH166095A
CH166095A CH166095DA CH166095A CH 166095 A CH166095 A CH 166095A CH 166095D A CH166095D A CH 166095DA CH 166095 A CH166095 A CH 166095A
Authority
CH
Switzerland
Prior art keywords
production
basic dye
easily soluble
phosphoric acid
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH166095A publication Critical patent/CH166095A/en

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Description

  

  Verfahren zur Herstellung eines leicht löslichen, basischen Farbstoffes.    Gemäss dem in dem Hauptpatent     Nr.163009     beschriebenen Verfahren lässt sich die Wasser  löslichkeit des Farbstoffes     Viktoriablau    R ganz  wesentlich erhöhen, wenn man diesen Handels  farbstoff durch Behandlung mit Phosphorsäure  in das phosphorsaure Salz verwandelt.  



  Wie nun weiter gefunden wurde, lässt  sich der basische Farbstoff     Tetramethyldi-          aminodiphena7,thioniumchlorid        (Methylenblau)     in der gleichen Weise in einen sehr leicht  wasserlöslichen Farbstoff überführen. Das       Farbstoffsalz    zeigt die gleichen Vorteile, die  im Hauptpatent für den aus     Viktoriablau    R  hergestellten Farbstoff beschrieben sind.  



  <I>Beispiel:</I>  32 Teile des Farbstoffes     Tetramethyldi-          aminodiphenazthioniumchlorid        (Methylenblau)     werden in 300 Teilen Wasser, 15 Teilen  Phosphorsäure 85     o/oiger    Stärke und 6 Teilen       Natriumphosphat    unter Rühren langsam zum  Sieden     erhitzt.    Dann filtriert man von etwa  igen geringen     Unreinigkeiten    ab, lässt er-    kalten und salzt den Farbstoff mit     Alkali-          phosphat    aus. Man erhält so ein hervorragend  lösliches, prachtvoll kristallisierendes     Farb-          salz.  



  Process for the production of an easily soluble, basic dye. According to the process described in the main patent No. 163009, the water solubility of the Viktoriablau R dye can be increased significantly if this commercial dye is converted into the phosphoric acid salt by treatment with phosphoric acid.



  As has now been found further, the basic dye tetramethyldiaminodiphena7, thionium chloride (methylene blue) can be converted into a very easily water-soluble dye in the same way. The dye salt shows the same advantages that are described in the main patent for the dye made from ViktoriablauR.



  <I> Example: </I> 32 parts of the dye tetramethyldi- aminodiphenazthionium chloride (methylene blue) are slowly heated to boiling with stirring in 300 parts of water, 15 parts of 85% strength phosphoric acid and 6 parts of sodium phosphate. Then any minor impurities are filtered off, allowed to cool and the dye is salted out with alkali phosphate. In this way, an extremely soluble, splendidly crystallizing colored salt is obtained.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines leicht löslichen, basischen Farbstoffes, dadurch ge kennzeichnet, dass man Tetramethyldiamino- diphenazthioniumchlorid in wässeriger Lösung mit Phosphorsäure behandelt; das erhaltene phosphorsaure Salz ist erheblich leichter lös lich als das Ausgangmaterial. UNTERANSPRUCH: Verfahren gemäss Patentanspruch, dadurch gekennzeichnet, dass man die Behandlung mit Phosphorsäure in Gegenwart von Alkaliphos- phat vornimmt. PATENT CLAIM: Process for the production of a readily soluble, basic dye, characterized in that tetramethyldiamino diphenazthionium chloride is treated in aqueous solution with phosphoric acid; the phosphoric acid salt obtained is considerably more easily soluble than the starting material. SUBCLAIM: Process according to patent claim, characterized in that the treatment with phosphoric acid is carried out in the presence of alkali metal phosphate.
CH166095D 1931-06-06 1932-05-18 Process for the production of an easily soluble, basic dye. CH166095A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE166095X 1931-06-06
CH163009T 1932-05-18

Publications (1)

Publication Number Publication Date
CH166095A true CH166095A (en) 1933-12-15

Family

ID=25717688

Family Applications (1)

Application Number Title Priority Date Filing Date
CH166095D CH166095A (en) 1931-06-06 1932-05-18 Process for the production of an easily soluble, basic dye.

Country Status (1)

Country Link
CH (1) CH166095A (en)

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