CH191439A - Process for the preparation of a chromium-containing dye. - Google Patents

Process for the preparation of a chromium-containing dye.

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Publication number
CH191439A
CH191439A CH191439DA CH191439A CH 191439 A CH191439 A CH 191439A CH 191439D A CH191439D A CH 191439DA CH 191439 A CH191439 A CH 191439A
Authority
CH
Switzerland
Prior art keywords
dye
chromium
amino
preparation
water
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 CH191439A publication Critical patent/CH191439A/en

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Description

  

  Verfahren zur Darstellung eines     ehromhaltigen    Farbstoffes.    Gegenstand des     vorliegenden,    Patentes ist  ein Verfahren zur Darstellung eines     chrom-          haltigen    Farbstoffes, welches .dadurch ge  kennzeichnet ist,     dass    man den Farbstoff,  der erhältlich     ist,    wenn mau     4-Amino-1    .

       8-          naphthalsäureanhydrid    mit Schwefelsäure  monohydrat     sulfiert    und die so     erhaltene            Sulfosäure    mit     2-Ogy-3-amino-5-sulfo-l-          benzoesäure    in Gegenwart von Wasser     und          Natriumbisulfit    erhitzt, mit chromabgeben  den Mitteln behandelt.  



  <I>Beispiel:</I>  50     Gewichsteile    des     Farbstoffes    folgender       Konstitution     
EMI0001.0020     
    (der dadurch erhältlich     ist,        da.ss    man     4-Amino-          1.8-naphthalsäureanliydrid    mit     Schwefel-          säuremonohyd#rat        sulfiert    und die so erhal-         tene        Sulfosäure    mit     2-Ogy-3-amino-5-sulfo-          1-benzoesäure    in     Gegenwart-    von- Wasser und       

  Natriumbisulfit    erhitzt) werden in 500 Ge-           wichtsteilen    Wasser bei     schwach        kongosaurer          Reaktion    suspendiert; dazu gibt man eine  Lösung von     Chromformiat    (entsprechend 16       Cxewichtsteilen    Chromoxyd) und hält einige  Stunden im     .Sieden.    Nach und nach geht der  Farbstoff     unter    Bildung seiner Chromver  bindung in Lösung. Nach Beendigung der  Reaktion wird der Farbstoff in üblicher  Weise isoliert, abgesaugt und getrocknet. Er       stellt    ein in Wasser     leicht    lösliches, ,gelbes  Pulver dar und ergibt z.

   B. auf Wolle nach  der für chromhaltige Farbstoffe üblichen  Färbemethode     grünstichig    .gelbe, egale Fär  bungen von guter Wasch-,     Walk-,    Schweiss-,  Seewasser- und     Lichtechtheit.  



  Process for the preparation of a dye containing Ehrom The subject of the present patent is a process for the preparation of a chromium-containing dye, which is characterized by the fact that the dye that is obtainable when 4-amino-1.

       8-naphthalic anhydride sulfated with sulfuric acid monohydrate and the sulfonic acid thus obtained is heated with 2-Ogy-3-amino-5-sulfo-1-benzoic acid in the presence of water and sodium bisulfite, treated with chromium-releasing agents.



  <I> Example: </I> 50 parts by weight of the dye of the following constitution
EMI0001.0020
    (which can be obtained by sulfating 4-amino-1,8-naphthalic anhydride with sulfuric acid monohydrate and the sulfonic acid thus obtained with 2-Ogy-3-amino-5-sulfo-1-benzoic acid in the presence of- water and

  Sodium bisulfite heated) are suspended in 500 parts by weight of water with a weak Congo acid reaction; a solution of chromium formate (corresponding to 16 parts by weight of chromium oxide) is added and it is boiled for a few hours. Gradually, the dye goes into solution to form its chromium compound. After the reaction has ended, the dye is isolated, filtered off with suction and dried in the usual way. It is an easily soluble in water, yellow powder and z.

   B. on wool according to the dyeing method customary for chromium-containing dyes .gelbe, level dyeings of good washing, milled, perspiration, seawater and lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines chrom haltigen Farbstoffes, dadurch gekennzeich net, .dass man :den Farbstoff, der erhältlich ist, wenn man 4-Amino-1. S-naphthalsäure- anhydrid mit Schwefelsäuremonohydrat sul- fiert und die so erhaltene Sulfosäure mit 2-Oxy-.3-amino-5-sulfo-l-benzoesäure in Ge genwart von Wasser und Natriumbisulfit erhitzt, mit ohromabgebenden Mitteln be handelt. PATENT CLAIM: A process for the preparation of a chromium-containing dye, characterized in that one: the dye that is obtainable when using 4-amino-1. S-naphthalic anhydride sulphated with sulfuric acid monohydrate and the sulphonic acid obtained in this way is heated with 2-oxy-.3-amino-5-sulpho-1-benzoic acid in the presence of water and sodium bisulphite, treated with ear-donating agents. Der so erhaltene Farbstoff ist ein in Wasser leicht lösliches gelbes Pulver und ergibt auf Wolle grünstichig gelbe, egale Färbungen von ,guten Echtheitseigenschaften. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man ,den Farbstoff in wässri,ger Suspension bei schwach kongo saurer Reaktion mit Chromformiat einige Stunden zum Sieden erhitzt. The dye obtained in this way is a yellow powder which is readily soluble in water and, on wool, produces greenish yellow, level dyeings with good fastness properties. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that the dye is heated to boiling for a few hours in aqueous suspension in a weakly Congo acidic reaction with chromium formate.
CH191439D 1934-10-11 1935-10-08 Process for the preparation of a chromium-containing dye. CH191439A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE191439X 1934-10-11
CH187695T 1935-10-08

Publications (1)

Publication Number Publication Date
CH191439A true CH191439A (en) 1937-06-15

Family

ID=25721568

Family Applications (1)

Application Number Title Priority Date Filing Date
CH191439D CH191439A (en) 1934-10-11 1935-10-08 Process for the preparation of a chromium-containing dye.

Country Status (1)

Country Link
CH (1) CH191439A (en)

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