CH150307A - Process for the preparation of a chromium-containing dye. - Google Patents

Process for the preparation of a chromium-containing dye.

Info

Publication number
CH150307A
CH150307A CH150307DA CH150307A CH 150307 A CH150307 A CH 150307A CH 150307D A CH150307D A CH 150307DA CH 150307 A CH150307 A CH 150307A
Authority
CH
Switzerland
Prior art keywords
chromium
dye
preparation
containing dye
acid
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 CH150307A publication Critical patent/CH150307A/en

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  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Description

  

  Verfahren zur Darstellung eines     chromhaltigen        Farbstoffes.       Es wurde gefunden, dass     mau    einen wert  vollen chromhaltigen     Farbstoff    erhält, wenn  man den aus     diazotierter        p-Aminosulfosali-          cylsäure    und     Resorcin    erhältlichen     Azofarb-          stoff    mit Verbindungen des dreiwertigen  Chroms behandelt.

   Diese     Behandlung    kann  beispielsweise durch Erhitzen auf dem Was  serbad oder durch Kochen unter     Rückfluss-          kühlung        mit    Lösungen von     Chromiformiat,          -acetat    oder     -fluorid        etc.    durchgeführt wer  den. Die erhaltene     Chromverbihdung    des  Farbstoffes gibt     besonders    auf Leder schöne,  volle,     gleichmässige    Braunfärbungen, die sehr  gut lichtecht sind.

      <I>Beispiel:</I>  35     Gewichtsteile        des        Azofarbstoffes     aus     diazotierter    p -     Aminosulfo:salicylsäure     (OH :     COOH    :     NHZ    :     S03H    = 1 : 2 : 4 : 6)  und     Resorcin    werden mit 500 Teilen     Wasser     und etwa 43 Teilen     einer    zirka 24%     CrA     enthaltenden     Chromoxydhydratpaste    und 20    Teilen 85%iger     Ameisensäure    zirka 1 bis  2     Stunden    lang bei 80-100   C erhitzt;

   da  nach     isoliert    man den Farbstoff durch Ein  dampfen der Lösung oder durch     Aussalzen.     Man erhält ein bräunliches Pulver, das sich  in konzentrierter Schwefelsäure mit oranger  Farbe löst und auf Leder ein :gleichmässiges,  besonders volles, schönes, sehr lichtechtes  Braun liefert.



  Process for the preparation of a chromium-containing dye. It has been found that a valuable chromium-containing dye is obtained if the azo dye obtainable from diazotized p-aminosulfosalicylic acid and resorcinol is treated with compounds of trivalent chromium.

   This treatment can be carried out, for example, by heating on the water bath or by refluxing with solutions of chromiformate, acetate or fluoride etc. The chromium compound obtained in the dye gives beautiful, full, even brown colorations, particularly on leather, which are very lightfast.

      <I> Example: </I> 35 parts by weight of the azo dye from diazotized p-aminosulfo: salicylic acid (OH: COOH: NHZ: S03H = 1: 2: 4: 6) and resorcinol are mixed with 500 parts of water and about 43 parts of an approx Chromium oxide hydrate paste containing 24% CrA and 20 parts of 85% formic acid heated at 80-100 C for about 1 to 2 hours;

   because after you isolate the dye by evaporating the solution or by salting out. A brownish powder is obtained which dissolves in concentrated sulfuric acid with an orange color and gives a uniform, particularly full, beautiful, very lightfast brown on leather.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eine, chrom- haltiges Farbstoffes, dadurch gekennzeichnet. dass man den aus diazotierter p-Aminosulfo- salieylsäure von der Formel EMI0001.0044 und Resorcin erhältlichen Azofarbstoff mit Verbindungen des dreiwertigen Chroms be handelt. Der Farbstoff ist ein bräunliches Pulver, das sich-in konzentrierter Schwefelsäure mit oranger Farbe löst und auf Leder ein gleich mässiges, besonders volles, schönes, sehr licht echtes Braun liefert. PATENT CLAIM: Process for the production of a chromium-containing dye, characterized. that one of diazotized p-aminosulfosalylic acid of the formula EMI0001.0044 and resorcinol available azo dye with compounds of trivalent chromium be. The dye is a brownish powder that dissolves in concentrated sulfuric acid with an orange color and gives leather an even, particularly full, beautiful, very light, real brown.
CH150307D 1929-11-18 1930-10-14 Process for the preparation of a chromium-containing dye. CH150307A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE150307X 1929-11-18

Publications (1)

Publication Number Publication Date
CH150307A true CH150307A (en) 1931-10-31

Family

ID=5673830

Family Applications (1)

Application Number Title Priority Date Filing Date
CH150307D CH150307A (en) 1929-11-18 1930-10-14 Process for the preparation of a chromium-containing dye.

Country Status (1)

Country Link
CH (1) CH150307A (en)

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